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87034098

5/03

2003 NEW HOLLAND NORTH AMERICA, INC.

Printed In U.S.A.

TN55, TN65, TN70, TN75

REPAIR MANUAL

COMPLETE CONTENTS

SECTION 00 - GENERAL

2

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SECTION 10 - ENGINE

2

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SECTION 18 - CLUTCH

3

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SECTION 21 - TRANSMISSIONS

3

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SECTION 23 - DRIVE LINES

5

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SECTION 25 - FRONT AXLE MECHANICAL TRANSMISSION

6

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SECTION 27 - REAR MECHANICAL TRANSMISSION

6

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SECTION 31 - MECHANICAL POWER TAKE-OFF

7

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SECTION 33 - BRAKING SYSTEM

8

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SECTION 35 - HYDRAULIC SYSTEM

8

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SECTION 41 - STEERING

10

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SECTION 44 - AXLES AND WHEELS

11

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SECTION 55 - ELECTRICAL SYSTEM

11

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SECTION 90 - PLATFORM, CAB, BODYWORK

15

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The following pages are the collation of the contents pages from each section and
chapter of the TN55, TN65, TN70, TN75 Repair manual. Complete Repair part #
87034092.

The sections used through out all New Holland product Repair manuals may not be
used for each product. Each Repair manual will be made up of one or several books.
Each book will be labeled as to which sections are in the overall Repair manual and
which sections are in each book. The sections listed above are the sections utilized for
the TN55, TN65, TN70, TN75 Tractors.

Summary of Contents for TN55

Page 1: ...ERING 10 SECTION 44 AXLES AND WHEELS 11 SECTION 55 ELECTRICAL SYSTEM 11 SECTION 90 PLATFORM CAB BODYWORK 15 The following pages are the collation of the contents pages from each section and chapter of the TN55 TN65 TN70 TN75 Repair manual Complete Repair part 87034092 The sections used through out all New Holland product Repair manuals may not be used for each product Each Repair manual will be ma...

Page 2: ...lant Pump and Alternator Drive Belt Tension adjustment 72 10 101 53 Valve guides Replacement 73 10 101 60 Injector holder casing Replacement 76 10 102 70 Front engine oil seal Removal Installation 78 10 106 12 Valve clearance adjustment 80 10 126 10 Fuel tank Removal Installation 82 10 218 30 Engine injectors Removal Installation 84 10 246 14 Bosch injection pump Removal Installation timing and ai...

Page 3: ...87034094 Chapter 1 Mechanical Transmission 8 x 8 16 16 Synchro Command and 8 x 8 Non Synchronized Transmissions CONTENTS Section Description Page 21 000 Main data 1 Torque settings 2 Special Tools 4 Cross sectional views 8 Description and operation 14 Troubleshooting 14 21 118 10 Rear Transmission Gearbox Removal Installation 21 118 12 16 21 118 85 Rear Transmission Gearbox Disassembly Assembly 23...

Page 4: ...scription of systems ECM and CDU 28 Automatic self diagnosis ECM 29 ECM First start up 30 Diagnosis during operation 31 Calibration and diagnostic unit CDU 32 Power shuttle fault code priority 33 Fault codes indication 36 Calibration and diagnostics unit use 37 HH menu access 38 H1 Clutches A and B calibration error codes 40 H2 Clutches A and B calibration values display 45 H3 System configuration...

Page 5: ...iring diagram 276 SECTION 23 DRIVE LINES BOOK 3 87034095 Chapter 1 Drive Lines CONTENTS Section Description Page 23 000 Main data 1 Torque settings 2 Cross sectional views 3 Description operation and hydraulic diagrams 7 Troubleshooting 7 23 101 26 Transmission shafts and guard Disassembly Assembly 8 23 101 40 Drive gear housing assembly Removal Installation 9 23 202 50 Drive gear housing assembly...

Page 6: ...s and Bearings Removal Replacement Installation 22 25 100 38 Bevel Drive and Front Axle Differential Axle Housing Disassembly Assembly 25 25 102 20 Front Axle Bevel Drive Overhaul 30 Bevel Drive Adjustments 33 25 102 24 Front Axle Differential Overhaul 40 25 102 27 Front Axle Differential with LIM Slip Unit Overhaul 41 44 511 80 Leading Drive Wheels Toe in Check 43 SECTION 27 REAR MECHANICAL TRANS...

Page 7: ... Assembly Removal Installation 27 120 20 25 27 120 34 Drive Wheel Shaft Removal Installation 27 27 120 32 Epicyclic Final Drive Removal Installation 29 SECTION 31 MECHANICAL POWER TAKE OFF BOOK 3 87034095 Chapter 1 Mechanical Power Take Off CONTENTS Section Description Page 31 000 Main data 1 Tools 3 Tightening torque 4 Cross sectional views 4 Description and operation 6 Troubleshooting 7 31 112 2...

Page 8: ...ol Travel adjustment 18 SECTION 35 HYDRAULIC SYSTEM BOOK 4 87034096 Chapter 1 Rear Mechanical Hydraulic Lift CONTENTS Operation Description Page 35 000 Main data 1 Torque settings 3 Tools 5 Cross sectional views 7 Description and operation 12 Troubleshooting 16 35 110 40 Lift internal controls Disassembly Assembly 18 Lift adjustments 22 35 110 08 Tie rod adjustments 28 Various adjustments 30 35 11...

Page 9: ...SYSTEM BOOK 4 87034096 Chapter 3 Trailer Brake Auxiliary Control Valve CONTENTS Operation Description Page 35 000 Description and operation 1 Cross sectional view 1 Troubleshooting 8 33 220 40 Trailer brake valve Removal Installation 11 SECTION 35 HYDRAULIC SYSTEM BOOK 4 87034096 Chapter 4 Non Stop Flow Gear Pump CONTENTS Operation Description Page 35 000 Main data 1 Torque settings Description an...

Page 10: ...Installation 10 41 204 34 Hydrostatic steering control valve removed Disassembly Assembly 15 41 204 38 Hydrostatic steering control valve Bench testing 30 SECTION 41 STEERING BOOK 4 87034096 Chapter 2 Non Stop Flow Gear Pump CONTENTS Operation Description Page 41 000 Main data 1 Torque settings Description and operation 2 Troubleshooting see Lift Chapter 1 Section 35 41 206 20 Power steering oil p...

Page 11: ... Troubleshooting 7 44 101 22 Front axle hub Removal Installation 8 44 101 30 Front axle Removal Installation 11 44 101 46 Stub axle Overhaul 14 44 511 80 Checking the alignment of the leading wheels 18 SECTION 55 ELECTRICAL SYSTEM BOOK 5 87034097 Chapter 1 Instruments CONTENTS Section Description Page 55 000 Analog instruments 2 Controls 4 Transmitters sensors and switches 6 ...

Page 12: ...5 201 50 Starter motor Removal Installation 6 55 201 54 Starter motor Disassembly Assembly 7 Bench tests 9 SECTION 55 ELECTRICAL SYSTEM BOOK 5 87034097 Chapter 3 Charging System CONTENTS Section Description Page 55 000 Technical information 1 Torque settings 1 Description and operation 2 System testing and troubleshooting 4 55 301 10 Alternator Removal Installation 9 55 301 12 Alternator Removed D...

Page 13: ...c wire colour code 5 General diagram Central part electrohydraulic 4WD version ISO version 6 General diagram Central part mechanical 4WD version ISO version 9 General diagram Front part ISO version 10 General diagram Rear part ISO version 13 Lighting circuit diagram ISO version 14 Electrohydraulic 4WD and brake lights circuit diagram 15 Mechanical 4WD and brake lights circuit diagram 16 Front corn...

Page 14: ...er shuttle versions 13 Starting circuit mechanical shuttle version 18 Starting circuit power shuttle version A Operator safety circuit description and operation B Operator safety circuit mechanical shuttle version C Operator safety circuit power shuttle version D Front lights circuit mechanical shuttle and power shuttle versions E Lighting circuit mechanical shuttle version F Lighting circuit powe...

Page 15: ...Fuses Relays Replacement 5 SECTION 90 PLATFORM CAB BODYWORK BOOK 5 87034097 Chapter 1 Bodywork CONTENTS Section Description Page 90 100 22 Hood opening Removal Installation 2 90 100 80 Protective grill Removal Installation 3 90 100 84 Hood guard Removal Installation 4 90 110 50 Dashboard Removal Installation 5 90 114 26 ROPS Roll Over Protection Structure Removal Installation 9 90 116 10 Right or ...

Page 16: ...16 ...

Page 17: ...tion the grooves so that they will deviate the fluid towards the inner side of the seal coat the sealing lip with a thin layer of lubricant use oil rather than grease and fill the gap between the sealing lip and the dust lip on double lip seals with grease insert the seal in its seat and press down using a flat punch do not tap the seal with a hammer or mallet whilst inserting the seal check that ...

Page 18: ...s to offer efficient and long lasting operation By using these tools Repair Personnel will benefit from operating in optimal technical conditions obtaining the best results saving time and effort working in safe conditions NOTE Wear limit values indicated for certain parts are recommended but not binding The terms front rear right hand and left hand when referred to different parts are intended as...

Page 19: ...wellery un buttoned or loose articles of clothing such as ties torn clothing scarves open jackets or shirts with open zips that may remain entangled in moving parts It is advised to wear approved safety clothing e g non slip footwear gloves safety goggles helmets etc 2 Do not carry out repair operations with someone sitting in the driver s seat unless the person is a trained technician who is assi...

Page 20: ...ear When carrying out checks with the engine run ning request the assistance of an operator in the driver s seat The operator must maintain visual contact with the service technician at all times If operating outside the workshop position the tractor on a flat surface and lock in position If working on a slope lock the tractor in position Move to a flat area as soon as is safely possible Damaged o...

Page 21: ...tem HYDRAULIC SYSTEMS A liquid leaking from a tiny hole may be almost invisible but at the same time be powerful enough to penetrate the skin Therefore NEVER USE HANDS TO CHECK FOR LEAKS but use a piece of cardboard or wood for this purpose If any liquid penetrates skin tissue call for medical aid immediately Failure to treat this condition with correct medical procedure may result inseri ous infe...

Page 22: ...ne Oil API SE CC 10W40 API CH 4 SS CCMC 04 UNI 20153 MIL L2104C ACEA E3 E5 Brake control circuit 0 7 0 18 0 5 0 13 AMBRA BRAKE LHM Mineral Brake Oil NH Brake Oil 86541699DS ISO 7308 Front axle axle case TN55 lateral final drives wi thout brakes each TN55 lateral final drives with brakes each TN65 TN70 and TN75 late ral final drives without bra kes each TN65 TN70 and TN75 late ral final drives with...

Page 23: ...ion adjustment 72 10 101 53 Valve guides Replacement 73 10 101 60 Injector holder casing Replacement 76 10 102 70 Front engine oil seal Removal Installation 78 10 106 12 Valve clearance adjustment 80 10 126 10 Fuel tank Removal Installation 82 10 218 30 Engine injectors Removal Installation 84 10 246 14 Bosch injection pump Removal Installation timing and air bleed check 86 10 254 44 Exhaust pipe ...

Page 24: ...s Hp TN 75 104 mm 4 09 inches Piston stroke 115 mm 4 53 inches Total displacement Hp TN 55 2931 cm3 0 77 gallons Hp TN 65 2931 cm3 0 77 gallons Hp TN 70 2931 cm3 0 77 gallons Hp TN 75 2931 cm3 0 77 gallons Compression ratio models TN 55 and TN 65 17 1 normal intake Compression ratio model TN 70 and TN 75 16 5 1 turbocharged Maximum power Hp TN 55 37 kW 50 HP Hp TN 65 44 kW 60 HP Hp TN 70 51 kW 70 ...

Page 25: ...alve opening pressure 3 5 bar 50 8 psi For further lubrication technical data See page 19 Cooling system water circulation Radiator on models TN 55 TN 65 3 row vertical pipes with copper fins Radiator on model TN 70 and TN 75 4 row vertical pipes with copper fins Fan attached to coolant pump pulley 6 blade steel exhauster fan Coolant pump centrifugal vane type Engine speed coolant pump speed ratio...

Page 26: ...ith clogged filter indicator with centrifugal pre filter and automatic dust ejector Fuel supply pump double diaphragm Fuel filtering through wire filter in fuel supply pump and replaceable cartridge on delivery line to injection pump Minimum fuel flow rate with pump shaft rotating at 1600 rpm 100 litres hour 26 42 gallons hour Operated by eccentric cam on camshaft BOSCH injection pump distributor ...

Page 27: ...F 1150 L 766 Hp TN 70 VE 3 11 F 1150 L 764 2 Hp TN 75 VE 3 11 F 1150 L 764 Direction of rotation counter clockwise Injection order 1 2 3 Injectors BOSCH type 500307714 Nozzle holder type 4791124 Nozzle type DLLA 132S 1320 99469341 Number of nozzle orifices 5 Diameter of nozzle orifices 0 23 mm 0 01 inches Pressure setting 260 to 272 bar 3771 2 to 3945 2 psi Fuel delivery lines BOSCH pump type 9944...

Page 28: ... TDC mm Pump rotation viewed from drive side counter clockwise Injection order 1 2 3 2 ADVANCE REGULATOR STROKE Rpm 1200 Advance stroke mm 0 7 to 1 1 inches 0 03 to 0 04 3 FUEL SUPPLY PUMP PRESSURE Rpm 1200 Internal pressure bar 8 1 to 8 7 psi 117 5 to 126 2 4 FULL LOAD DELIVERY Rpm 700 Delivery per 1000 shots cm3 59 5 to 60 5 gal 0 0157 to 0 0159 Spread cm3 3 5 gal 0 000925 5 SPREAD GOVERNOR AT I...

Page 29: ...100 60 to 100 0 0158 to 0 0264 250 49 to 57 0 0129 to 0 0151 150 75 to 105 0 0198 to 0 0277 BENCH TEST PERFORMANCE DATA Test conditions Fixed advance before TDC cylinder No 1 in compression stroke see previous page Relative humidity 70o o 5 Engine without fan air filter and exhaust silencer Ambient temperature 25o 3o C 77o 37 4o F Atmospheric pressure 990 10 mbar 14 36 0 15 psi Specific gravity of...

Page 30: ...ift from TDC mm Pump rotation viewed from drive side counter clockwise Injection order 1 2 3 2 ADVANCE REGULATOR STROKE Rpm 1240 Advance stroke mm 0 4 to 1 4 inches 0 016 to 0 055 3 FUEL SUPPLY PUMP PRESSURE Rpm 1200 Internal pressure bar 7 7 to 8 9 psi 111 7 to 129 1 4 FULL LOAD DELIVERY Rpm 700 Delivery per 1000 shots cm3 64 1 to 69 1 gal 0 017 to 0 018 Spread cm3 3 5 gal 0 000925 5 SPREAD GOVER...

Page 31: ... per 1000 shots cm3 gallons 100 55 to 95 0 0145 to 0 0251 270 52 5 to 62 5 0 0139 to 0 0165 180 73 to 103 0 0193 to 0 0272 BENCH TEST PERFORMANCE DATA Test conditions Fixed advance before TDC cylinder No 1 in compression stroke see previous page Relative humidity 70o o 5 Engine without fan air filter and exhaust silencer Ambient temperature 25o 3o C 77o 37 4o F Atmospheric pressure 990 10 mbar 14 ...

Page 32: ...ROKE Rpm 900 Advance stroke mm 1 2 to 1 4 inches 0 047 to 0 055 3 FUEL SUPPLY PUMP PRESSURE Rpm 900 Internal pressure bar 6 8 to 7 4 psi 98 6 to 107 3 4 FULL LOAD DELIVERY WITH BOOSTER PRESSURE Rpm 700 LDA pressure kPa 100 Delivery per 1000 shots cm3 80 5 to 81 5 gal 0 0213 to 0 0215 Spread cm3 3 5 gal 0 000925 5 FULL LOAD DELIVERY WITHOUT BOOSTER PRESSURE Rpm 600 Portata per 1000 mandate cm3 73 5...

Page 33: ...re kPa Delivery per 1000 shots cm3 gal 100 80 to 110 0 0211 to 0 0290 250 74 to 86 0 0195 to 0 0227 BENCH TEST PERFORMANCE DATA Test conditions Fixed advance before TDC cylinder No 1 in compression stroke see previous page Relative humidity 70o o 5 Engine without fan air filter and exhaust silencer Ambient temperature 25o C 77o F Atmospheric pressure 740 5 mbar 14 31 0 096 psi Specific gravity of ...

Page 34: ... to 0 075 3 FUEL SUPPLY PUMP PRESSURE Rpm 1220 LDA pressure kPa 100 Internal pressure bar 8 3 to 9 5 psi 120 4 to 137 8 4 FULL LOAD DELIVERY WITH BOOSTER PRESSURE Rpm 700 LDA pressure kPa 100 Delivery per 1000 shots cm3 88 to 93 gal 0 023 to 0 025 Spread cm3 3 5 gal 0 000925 5 FULL LOAD DELIVERY WITHOUT BOOSTER PRESSURE Rpm 500 LDA pressure kPa 0 Delivery per 1000 shots cm3 78 2 to 83 2 gal 0 021 ...

Page 35: ...to 125 0 0225 to 0 0330 250 71 to 91 0 0188 to 0 0240 160 100 to 130 0 0264 to 0 0343 BENCH TEST PERFORMANCE DATA Test conditions Fixed advance before TDC cylinder No 1 in compression stroke see previous page Relative humidity 70o o 5 Engine without fan air filter and exhaust silencer Ambient temperature 25o 3o C 77o 37 4o F Atmospheric pressure 990 10 mbar 14 36 0 15 psi Specific gravity of diese...

Page 36: ...Internal diameter of cylinder liners 104 000 to 104 024 4 0945 to 4 0954 1 External diameter of cylinder liners 107 020 to 107 050 4 2134 to 4 2146 Diameter of cylinder bores 106 850 to 106 900 4 2067 to 4 2087 Interference fit between cylinder liners and bores 0 120 to 0 200 0 0047 to 0 0079 Liner internal diameter oversizes 0 4 to 0 8 0 0157 to 0 0315 Liner external diameter oversizes 0 2 0 0079...

Page 37: ... to 0 0034 Wear limit endfloat 0 180 0 0071 Standard crankshaft thrust washer thickness 3 378 to 3 429 0 1330 to 0 1350 Thrust washer oversizes thickness 0 127 0 254 0 381 0 508 0 005 0 01 0 015 0 02 Width of main bearing including thrust washers 31 766 to 31 918 1 2506 to 1 2566 Width of corresponding crankshaft journal 32 000 to 32 100 1 2598 to 1 2638 Crankshaft assembly endfloat 0 082 to 0 334...

Page 38: ...otal gauge reading 0 04 0 0002 CONNECTING ROD DATA mm inches CONNECTING ROD DATA mm inches Connecting rods cast iron with oil way Diameter of small end bushing seat 41 846 to 41 884 1 6475 to 1 6490 Outside diameter of small end bushing 41 979 to 42 017 1 6527 to 1 6542 Interference between small end bushing and seat 0 095 to 0 171 0 0037 to 0 0067 Inside diameter of small end bushing measured aft...

Page 39: ...er 37 983 to 37 990 1 4954 to 1 4957 Diameter of gudgeon pin seat in piston 37 993 to 38 000 1 4958 to 1 4961 Gudgeon pin to seat clearance 0 003 to 0 017 0 0001 to 0 0007 Gudgeon pin to small end bearing clearance 0 014 to 0 031 0 0006 to 0 0012 Wear limit endfloat 0 06 0 0024 Maximum weight difference between pistons in same engine 20 grams 0 044 lb Piston ring groove clearance measured vertical...

Page 40: ...070 to 0 150 0 0028 to 0 0059 Inside diameter of camshaft bearings fitted and reamed front 51 080 to 51 130 2 0110 to 2 0130 centre 50 580 to 50 630 2 1604 to 2 1626 rear 50 080 to 50 130 2 1604 to 2 1626 Diameter of camshaft journals front 50 970 to 51 000 1 9913 to 2 0079 centre 50 470 to 50 500 1 9870 to 1 9882 rear 49 970 to 50 000 1 9673 to 1 9685 Clearance between camshaft journals and beari...

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