New holland t1570 tractor service repair manual

SERVICE MANUAL
Print No. 84205613A
T1560 / T1570
Compact Tractors
SERVICE
MANUAL
Print No. 84205613A
T1560
T1570
Compact
Tractors

SECTION 00 -- GENERAL -- CHAPTER 1 1
84205613A -- 07 -- 2009
SECTION 00 -- GENERAL INFORMATION
Chapter 1 -- General Information
CONTENTS
Section Description Page
Introduction 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International Symbols 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Dimensions 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Hardware Tightening Torques 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Bolt Torque Specifications 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 SECTION 00 -- GENERAL -- CHAPTER 1
84205613A -- 07 -- 2009
INTRODUCTION
This repair manual provides the technical
information needed to properly service the New
Holland T1560 and T1570 tractor. Use this manual in
conjunction with the operator’s manual for complete
operation, adjustment, and maintenance
information.
On New Holland equipment, left and right are
determined by standing behind the unit, looking in
the direction of travel.

84205613A -- 07 -- 2009
PLEASE READ CAREFULLY:
A PRODUCT IDENTIFICATION PLATE is located on
the left-hand side of the transmission housing. The
numbers on the plate are important in the event your
tractor should require future service. For your
convenience, have your dealer record these
numbers in the appropriate spaces below.
New Holland North America, Inc. is continually
striving to improve its products. We reserve the right
to change prices, specification, or equipment at any
time without notice.
T1560 & T1570 ID PLATE LOCATION
All data given in this book is subject to production
variations. Dimensions and weights are approximate
only, and the illustrations do not necessarily depict
tractors in standard condition. For exact information
about any particular tractor, please consult your New
Holland dealer.
1

10 SECTION 00 -- GENERAL -- CHAPTER 1
84205613A -- 07 -- 2009
GENERAL DIMENSIONS FOR T1560 & T1570
2
Model T1560/T1570
(A)—LENGTH: (3 pt. Horizontal)
4WD
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(B)— TO TOP OF ROPS:
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2825mm
2825mm
2425mm
2490mm
(C)-- MINIMUM GROUND CLEARANCE:
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
250mm
310mm

84205613A -- 07 -- 2009
GENERAL DIMENSIONS Contd: Model T1560/T1570
(D)—WIDTH: REAR AXLE:
Outside to Outside:
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1510mm (Narrow setting)
1387mm (Narrow setting)
(E)—WHEEL BASE:
FWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1600mm
(F)— FRONT WHEEL CENTRES:
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1100mm
1150mm
(G)— REAR WHEEL CENTRES:
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1390mm
1500mm
(H)— HEIGHT TO TOP OF STEERING WHEEL:
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag. Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1350mm
1415mm
WHEEL TREAD SETTINGS:
FRONT:
Agricultural:
FWD
9x3 Transmission . . . . . . . . . . . . . . . . . . . . . . . . .
HST Transmission . . . . . . . . . . . . . . . . . . . . . . . .
Turf:
FWD
9x3 Transmission . . . . . . . . . . . . . . . . . . . . . . . . .
REAR:
Agricultural:
FWD
9x3 Transmission . . . . . . . . . . . . . . . . . . . . . . . . .
Turf:
FWD
9x3 Transmission . . . . . . . . . . . . . . . . . . . . . . . . .
1100mm
1100mm
1150mm
1150mm
1070mm
1070mm
1120mm
1120mm
WEIGHT:
With ROPS & Ag Tyres:
FWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ag Tyres . . . . . . . . . . . . . . . . . . . . . . . . . .
Turf Tyres . . . . . . . . . . . . . . . . . . . . . . . . .
HST 9 x 3
1056 kg 1050 kg
2328 lbs 2315 lbs
1048 kg 1042 kg
2311 lbs 2298 lbs

SECTION 10 -- ENGINE -- CHAPTER 1 1
84205613A -- 07 -- 2009
SECTION 10 -- ENGINE
Chapter 1 -- Engine
CONTENTS
Specifications 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Bolt Torque Specifications 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Bolt Torque Specifications 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Fuel System Bolt Torque Specifications 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compression Test and Tools 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of Operation -- Engine 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Valve Train Components 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Block Assembly 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overhaul -- Engine 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injector and Glow Plug 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Switch 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Sending Switch and Alternator 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan, Water Pump, and External Oil Tube 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Cover 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rocker Arm Shaft and Support Bracket 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Tappet 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Shutoff Solenoid 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Gear Cover 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Gears and Camshaft 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Sump 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Suction Pipe and Strainer 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 SECTION 10 -- ENGINE -- CHAPTER 1
84205613A -- 07 -- 2009
Connecting Rods, Bearings, Pistons, and Rings 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backplate and Oil Seal 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft and Main Bearings 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Seats 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valves 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Guides 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Springs 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Replacement 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rocker Arms 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Push Rods 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Block 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pistons 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly and Inspection 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Piston Rings 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rods 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rod Bearing Oil Clearance Check 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pistons, Rings, and Connecting Rod 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Bearing and Thrust Washer 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Inspection 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Bearing (Bushing) 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Bearing and Thrust Washer 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Port Block 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

84205613A -- 07 -- 2009
Timing Gear 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Gear Housing 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Oil Seal and Steering Pump Seal 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft and Bearing Holder 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Oil Seal and Backplate 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pistons and Connecting Rods 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Suction Pipe and Suction Strainer 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Sump 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft and Camshaft Gear 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Idler Gear, Oil Pump, and Injection Timing 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Gear Cover 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Pulley 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injection Pump 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Steering Pump 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Gasket Selection 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Clearance Adjustment 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Cover 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Pump and Cooling Fan 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Oil Tube 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glow Plug and Connector 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

84205613A -- 07 -- 2009
Fuel Injector 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Piping 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternator and Temperature Sender Switch 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Manifold 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of Operation -- Engine Lubrication System 60. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Filter 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Construction and Function 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pump 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation and Adjustment 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil Pressure Check 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Relief Valve 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Consumption 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of Operation -- Cooling System 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Cap 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Pump 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling Fan 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overhaul -- Cooling System 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Pump 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separating the Tractor 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine/Clutch Housing 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

84205613A -- 07 -- 2009
SPECIFICATIONS
GENERAL T1560 T1570
Gross Engine in Kw(Hp) 22.4 (30) 24.6 (33)
PTO in Kw(Hp)
w/9 x 3
w/HST
17.7 (23.7)
17.2 (23.1)
26.0 (34.8)
19.0 (25.5)
Engine Model N843 N843
Number of Cylinders 3 3
Bore x Stroke in mm 84 x 90 84 x 90
Displacement in Litres 1.496 1.496
Compression Ratio 22.2:1 22.2:1
Rated Speed in rpm 2800 2800
Muffler Location Under Hood Under Hood
Firing Order 1-2-3 1-2-3
Low Idle Speed in rpm 1000 -- 1100 1000 -- 1100
High Idle Speed in rpm 3000 3000
Cylinder Arrangement In-line Vertical In-line Vertical
Valve Arrangement Overhead Overhead
CYLINDER BLOCK
Bore Standard in mm 84 - 84.019 84 - 84.019
Bore Maximum in mm 84.2 84.2
Head Surface Warp Standard in mm 0.05 0.05
Head Surface Warp Maximum in mm 0.12 0.12
CYLINDER HEAD
Head Warp in mm
Standard
Maximum
0.05
0.12
0.05
0.12
Valve Seat Width in mm
Standard Intake
Exhaust
Maximum
1.66 - 1.87
1.66 -- 1.73
2.5
1.66 - 1.87
1.66 -- 1.73
2.5
Valve Seat Face Angle 45_ 45_
Valve Seat Sink in mm
Standard
Maximum
0.85 - 1.15
1.8
0.85 - 1.15
1.8

84205613A -- 07 -- 2009
PISTON T1560 T1570
Diameter in mm
Standard
Minimum
83.948 - 83.963
83.7
83.948 - 83.963
83.7
Bore Clearance in mm
Standard
Maximum
0.038 - 0.072
0.25
0.038 - 0.072
0.25
Piston Pin Bore in mm
Standard
Maximum
27.999 - 28.005
(1.10231 - 1.1026)
28.02 (1.1031)
27.999 - 28.005
(1.10231 - 1.1025)
28.02 (1.1031)
Piston Pin Clearances in mm (in.)
Standard
Maximum
--0.001 +0.007
0.02
--0.001 +0.007
0.02
PISTON PIN
Diameter in mm
Standard
Maximum
27.996 - 28.0
27.98
27.996 - 28.0
27.98
Pin-to-Bushing Clearance in mm
Standard
Maximum
0.01 - 0.025
0.08
0.01 - 0.025
0.08
PISTON RING END GAP
1st Compression in mm
Standard
Maximum
0.2 - 0.35
1.0
0.2 - 0.35
1.0
2nd Compression in mm
Standard
Maximum
0.20 - 0.40
1.0
0.20 - 0.40
1.0
Oil Ring in mm
Standard
Maximum
0.20 - 0.40
1.0
0.20 - 0.8
1.0

84205613A -- 07 -- 2009
PISTON RING COMPRESSION RING TO
GROOVE SIDE CLEARANCE
T1560 T1570
1st Compression in mm
Standard
Maximum
0.07 - 0.11
0.25
0.07 - 0.11
0.25
2nd Compression in mm
Standard
Maximum
0.04 - 0.08
0.25
0.04 - 0.08
0.25
Oil Ring in mm (in.)
Standard
Maximum
0.02 - 0.06
0.15
0.02 - 0.06
0.15
PISTON RING WIDTH
1st Compression in mm 2.0 2.0
2nd Compression in mm 1.5 1.5
Oil Ring in mm 4.0 4.0
CONNECTING ROD
Rod Twist in mm
Standard
Maximum
< 0.08
> 0.2
< 0.08
> 0.2
Rod Bend in mm
Standard
Maximum
< 0.05
> 0.15
< 0.05
> 0.15
Rod Side Play in mm
Standard
Maximum
0.1 - 0.3
0.7
0.1 - 0.3
0.7
Crankshaft Bearing Clearance in mm
Standard
Maximum
0.035 -- 0.085
0.2
0.035 -- 0.085
0.2

84205613A -- 07 -- 2009
CRANKSHAFT T1560 T1570
Journal Diameter in mm
Standard
Minimum
67.957 - 67.97
67.9
67.957 - 67.97
67.9
Crankpin Diameter in mm
Standard
Minimum
51.964 - 51.975
51.9
51.964 - 51.975
51.9
Runout in mm
Standard
Maximum
< 0.03
> 0.06
< 0.03
> 0.06
End Play in mm
Standard
Minimum
0.1 - 0.4
0.5
0.1 - 0.4
0.5
Thrust Washer Thickness in mm
Standard
Maximum
2.95 - 3.0
2.8
2.95 - 3.0
2.8
CAMSHAFT
Cam Height - Valve mm
Standard
Minimum
34.441 -- 34.5076
34.1
34.441 -- 34.5076
34.1
Bend in mm
Standard
Maximum
< 0.03
> 0.1
< 0.03
> 0.1
Cam Height - Fuel mm
Standard
Minimum
42.99 -- 43.01
42.8
42.99 -- 43.01
42.8
VALVES
Stem Diameter - Intake in mm
Standard
Minimum
6.955 - 6.97
6.89
6.95 - 6.97
6.89
Stem Diameter - Exhaust in mm
Standard
Minimum
6.94 - 6.955
6.84
6.94 - 6.955
6.84
Guide Clearance - Intake in mm
Standard
Maximum
0.03 - 0.06
> 0.2
0.03 - 0.06
> 0.2
Guide Clearance-Exhaust in mm
Standard
Maximum
0.05 - 0.075
> 0.25
0.05- 0.075
> 0.25
Valve Margin in mm
Standard
Allowable Limit
0.775 - 1.075
0.5
0.775 - 1.075
0.5

84205613A -- 07 -- 2009
VALVES Contd; T1560 T1570
Valve Clearance (Inlet/Exhaust) in mm 0.2 0.2
Valve Spring-Free Height in mm
Standard
Allowable Limit
35
33.5
35
33.5
Valve Spring-Sqareness in mm
Standard
Allowable Limit
< 1.2
2.0
< 1.2
2.0
Valve Spring-Compressed Height in mm
Standard @ 8.1 kg
Allowable Limit @ 7 kg
30.4
30.4
30.4
30.4
Valve Timing -- Intake
Open Before TDC
Close After BDC
13_
43_
13_
43_
Valve Timing -- Exhaust
Open Before TDC
Close After BDC
43_
13_
43_
13_
PUSH RODS
Length in mm
Diameter in mm
177.6--178.0
6.3
177.6--178.0
6.3
ROCKER ARM
Shaft Diameter in mm
Allowable Limit
14.95 -- 14.97
14.87
14.95 -- 14.97
14.87
Shaft to Rocker Clearance in mm
Standard
Allowable Limit
0.032 - 0.068
0.2
0.032 - 0.068
0.2
LUBRICATION SYSTEM
Relief Valve - Opening Pressure in Bar 2.4 - 3.4 2.4 - 3.4
Rotor to Vane Clearance in mm
Standard
Allowable Limit
0.1 -- 0.15
0.25
0.1 -- 0.15
0.25
Rotor to Cover Clearance in mm
Standard
Allowable Limit
0.1 -- 0.15
0.2
0.1 -- 0.15
0.2

84205613A -- 07 -- 2009
COOLING SYSTEM
Type of System Pressurized liquid w/recirculating by-pass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Pump:
Type Centrifugal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive V-belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Belt Deflection (tension) 5 to 10mm when. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 kg is applied
midway between pulleys
Fan Diameter 340 mm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat: T1560/T1570
Starts to Open 82°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fully Open 95°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Cap Pressure
Rating 0.9 bar (13 psi). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Ethylene glycol and water in a 50/50 mixture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacity 5.0 Litres. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

84205613A -- 07 -- 2009
OVERHAUL -- ENGINE
ENGINE
Preparation
1. Disconnect the battery leads (1) and battery hold
down bracket (2) to remove the battery.
2. Remove tractor hood and side panels.
1
2
5
3. Turn coolant tap bolt (1) counterclockwise to
drain fluid. Remove the radiator assembly. See
“Radiator Removal”, discussed later in this
section.
50014021
1
6
4. Remove the air cleaner assembly (1) along with
the air cleaner hoses.
36071920
1
7

84205613A -- 07 -- 2009
WARNING
Exhaust components may be extremely hot. Let
components cool before removing.
5. Remove the exhaust muffler (1) and tailpipe
assembly.
36071935
1
8
FUEL INJECTOR AND GLOW PLUG
Removal
1. Clean all dirt and oil from the injectors and
surrounding areas.
2. Disconnect the fuel lines (1) from the injectors
and cap all openings.
3. Remove the injector fuel leak-off line (2).
4. Remove the injector assemblies (3).
5. Remove the glow plug bus connector (4) and
remove the glow plugs (5).
1
5
3
76075708
2
4
5
9
OIL PRESSURE SWITCH
Removal
Remove the oil pressure switch (1).
1
10

84205613A -- 07 -- 2009
TEMPERATURE SENDING SWITCH
AND ALTERNATOR
Removal
1. Remove the temperature sending switch (1) from
the front of the cylinder head.
2. Loosen the alternator mounting bolts (2) and
remove the V-belt (3) from the drive pulley.
3. Disconnect the alternator wires from the back of
alternator (4).
4. Remove the alternator mounting bolts (2) and
remove the alternator.
1
3
2
4
2
11
FAN, WATER PUMP, AND EXTERNAL
OIL TUBE
Removal
1. Remove the fan and water pump assembly. See
“Fan Removal” and “Water Pump Removal”
discussed later in this section.
2. Remove the external oil transfer tube banjo bolt
(1) from the front of the cylinder head.
19988040
1
12
HEAD COVER
Removal
Remove the retaining bolts (1) cap nuts (2) and seal
washers (3) and remove the head cover (4) with
gasket (5).
36071922
1
2
3
4
5
13

84205613A -- 07 -- 2009
ROCKER ARM SHAFT AND SUPPORT
BRACKET
Removal
Remove the bolts (1) and nuts (2) remove the rocker
arm shaft and support bracket as an assembly (3)
and gasket (4).
NOTE: Alternately loosen the rocker support bolts a
turn at a time to prevent distorting the rocker shaft.
20043770
3
4
2
1
1
14
CYLINDER HEAD
Removal
NOTE: Keep all valve components in separately
marked containers for re-assembly in their original
location
1. Remove the valve stem caps (1) and push rods
(2).
2. Toremovethecylinderhead,remove thecylinder
head bolts (3) by alternately loosening a half turn
at a time to prevent warping the head.
1 2
3
15

84205613A -- 07 -- 2009
VALVE TAPPET
Removal
Remove the valve tappets (1) from the machined
bore in the cylinder block.
1
16
FUEL SHUTOFF SOLENOID
Removal
Remove the wire connector and unscrew the fuel
shutoff solenoid (1).
1
76075708
17
TIMING GEAR COVER
Removal
1. Drain the engine crankcase oil.
2. Remove the crankshaft pulley.
3. Disconnect the throttle control rod at the injection
pump.
4. Loosen the four injection pump mounting bolts
(1) and raise the injection pump (2) enough to
remove the spring pin (3) and separate the
governor link from the control rack. Remove the
injection pump.
3
2
1
1
18

84205613A -- 07 -- 2009
5. Remove the adapter (1) and suction hose (2)
from the oil pump (3).
6. Remove the pressure tube (4) from the bottom of
the steering pump.
7. Remove the through bolts (5) and remove the
steering pump from the front cover. Cap the lines
and pump openings.
5
3
4
36071923
12
19
8. Remove retaining nut (1). Pull crankshaft pulley
(2) off of crankshaft (3).
2
1
3
36071924
20
9. Remove the retaining bolts (1) and lift the cover
(2) off the locating dowels. 1
2
21

84205613A -- 07 -- 2009
TIMING GEARS AND CAMSHAFT
Removal
1. Remove retaining ring (1) and remove the idler
gear (2) and oil pump assembly (3). 1
3
2
22
2. Remove the two bolts (1) securing the keeper
plate (2). One must be accessed using the
access hole (3) in the cam gear.
3. Slide the camshaft and gear out of the camshaft
bore.
1
3
2
23
OIL SUMP
Removal
1. Remove the oil sump retainer bolts (1).
2. Remove the oil sump and discard gasket (2).
1
2
24

84205613A -- 07 -- 2009
OIL SUCTION PIPE AND STRAINER
Removal
1. Remove the two retaining bolts (1).
2. Remove the oil strainer (2) and rotate the oil
suction pipe (3) out of its bore. Remove from the
front side of the block.
2
3
1
76075709
25
CONNECTING RODS, BEARINGS,
PISTONS, AND RINGS
Removal
1. Remove the two nuts (1) retaining the connecting
rod caps (2).
2. Remove the connecting rod caps and lower half
of connecting rod bearing.
3. If necessary, remove any ridge from the top of the
cylinder bores using a suitable ridge reamer.
2
76075710
1
26
4. Push the piston and connecting rod out of the
cylinder block.
5. Replace the connecting rod cap to the piston
assembly it was removed from. Keep together in
cylinder sequence.
27

84205613A -- 07 -- 2009
FLYWHEEL
Removal
1. Loosen the flywheel retaining bolts.
2. Using a brass drift and hammer, tap the end of
the crankshaft (1) to loosen the flywheel (2) from
the shaft.
12
28
BACKPLATE AND OIL SEAL
Removal
1. Remove the backplate retaining bolts and
remove the backplate.
2. Remove the rear oil seal (1).
1
29
CRANKSHAFT AND MAIN BEARINGS
Removal
1. Remove the crankshaft bearing holder retaining
bolts (1).
2. Slide the crankshaft and main bearing assembly
through the rear of the engine. 1
30

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84205613A -- 07 -- 2009
CYLINDER HEAD
Disassembly
1. Clean the cylinder head and remove any carbon
deposits from around the valve heads.
2. Use a valve spring compressor and remove the
valve spring retainer locks (1), spring (2) and
spring retainer (3) from each valve (4).
3. Remove the valves and place the valve
components together in separately marked
containers for reassembly in their original
position.
2
31
4
31
Inspection and Repair
1. Clean all carbon deposits from the combustion
chamber and valve ports using a wire brush and
scraper.
2. Clean all dirt and residue from the gasket surface
using care not to scratch or nick the machined
surface.
3. Clean the cylinder head in solvent and air dry.
4. Inspect the head for cracks or damage in the
following areas:
• Valve ports
• Valve seats (1)
• Prechamber (2)
• External cracks in the water jackets (3)
5. Inspect the gasket surfaces for scratches or
nicks, which could cause leakage.
6. Examine the core hole plugs for rust or signs of
leakage. If a plug shows signs of damaging rust
or leakage, replace all plugs in the head.
7. Inspect the prechamber for carbon deposits and
looseness. Remove any carbon deposits found.
If prechamber is found to be loose, cylinder head
may be warped.
1 3
2
32

84205613A -- 07 -- 2009
8. Use a straight edge and a feeler gauge and
check the cylinder head for warp lengthwise,
crosswise, and diagonally.
33
VALVE SEATS
Examine the valve seats and surface the seat if
damaged. Valve seat grinding requires that the seat
be ground to the correct width and properly
positioned. A valve that extends too deep into the
combustion area will result in valve burning. If the
valve is recessed too deep into the head it will cause
a rapid build-up of carbon deposits.
1. Check the seat for surface defects. Use a 45°
stone if necessary to reface. Grind away only
enough material to provide a smooth even seat.
1
2
3
34
1. Correct Valve Seat Width and Location
2. Correct Valve Head Margin N843 0.7 - 1.0 mm
(0.027 - 0.039 in)
3. 45° Valve Seat Angle
2. Check the seat width. If necessary, use a 15°
stone to lower the seat contact point and use a
75° stone to raise the seat contact point.
NOTE: Refacing the seat should always be
coordinated with refacing of the valve to ensure a
compression tight fit.
150° 3
90° 1
30° 2
0.020 IN.
(0.5 MM)
MIN.
35
1. Seat angle - 45° Stone
2. Lower Seat Location - 15° Stone
3. Raise Seat Location - 75° Stone

84205613A -- 07 -- 2009
VALVES
1. Clean all deposits from the valves using a soft
wire brush. Inspect the condition of the valves
and discard any that are badly burned, cracked,
or bent.
2
1
6
5
4
3
36
1. Margin Too Thin Min. 0.5 mm (0.02 in)
2. Bent Valve
3. Pitting
4. Indented
5. Wear or Nicking
6. Burned
2. Using a micrometer, measure the valve stem at
points “A,” “B,” and “C.”
A B C
A B C
37
3. If inspection indicates that the valve may be
reused, the valve should be ground.
4. After grinding the valveand seat,checktoensure
the seat contacts the center of the valve face.
Using Prussian Blue, lightly coat the valve seat,
place the valve in position and rotate the valve
slightly while holding a light pressure against the
valve. If the blue is transferred to the center of the
valve face, the contact is correct.
1
2
38
1. 45° Angle Seat
2. Minimum Valve Margin

84205613A -- 07 -- 2009
5. If Prussian Blue is not available, mark the valve
face or seat, 1, with a soft lead pencil. Rotate the
valve slightly in the seat. The penciled lines will
be broken at the seat contact area.
1
39
VALVE GUIDES
Thoroughly clean the valve guides before attempting
to check internal wear.
1. Using a telescoping gauge and micrometer,
measure the valve guide bore at the top and
bottom wear points (1).
1
1
40
2. Determine the valve stem to valve guide
clearance (1) by subtracting the valve stem
diameter from the valve guide diameter. Replace
valves if the clearance (1) is more than 0.2 mm,
intake valves, or 0.25 mm, exhaust valves.
3. Replace the cylinder head if excessive clearance
is determined and the valves have met all
specified measurement requirements. See
“Specifications”.
1
41

84205613A -- 07 -- 2009
VALVE SPRINGS
Inspection and Replacement
1. Place the valve springs on a flat surface.
Measure the free length of the spring and
squareness. Replace springs that do not meet
the following specifications (all models):
Max. Out of Square Min. Free-Length
2.0 mm 33.5 mm
2. Place the springs in a suitable spring load tester
and measure the spring load rating. Replace
springs that do not meet the following
specifications (all models):
Standard Maximum
8.1 kg (17.86 lb)
at 30.4 mm
7 kg (15.43 lb)
at 30.4 mm
42
ROCKER ARMS
Inspection and Replacement
1. Thread an 8 mm bolt into the front end of the
rocker shaft and slowly withdraw the rocker shaft
while at the same time removing the rocker arms
and springs.
2. Inspect the rocker arms and shaft for wear or
damage. Check the adjusting screws for
damaged threads or excessive wear.
3. Check the valve stem contact area for pitting or
excessive wear. Slight wear patterns may be
removed using a fine grit oil stone.
20043773
5
4
3
2
3
43
1. Rocker Arm
2. Shims
3. Spring
4. Rocker Arm Shaft

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