New Holland TN55D/TN55S/TN65D/TN65S/TN70D/TN70S/TN75D/TN75S Tractors OEM Service & Repair Manual

PRINT NO. 603.54.351.01 1 st Service Manual Update models TN55D/S, TN65D/S, TN75D/S -- Print no. 603.54.351.00 IMPORTANT NOTES These pages replace the corresponding pages in the Manual of models TN55D/S, TN65D/S, TN75D/S -- preface pages 1 and 2. -- contents, pages 3, 4, 5, 6, 7, 8, 9 and 10. -- Section 00, pages 5 and 6. -- Section 10, Chapter 1, pages 1, 2, 3, 4, 5, 6, 15, 16, 19, 20, 21, 22, 65, 66, 81, 82, 83 and 84. -- Section 18, Chapter 1, pages 1, 2, 3, 4, 5, 6, 11, 12, 13, 14, 15 and 16. -- Section 21, Chapter 1, pages 29 and 30. -- Section 21, Chapter 3, pages 1, 2, 9, 10, 25, 26, 27, 28, 29, 30, 31, 32, 33 and 34. -- Section 23, Chapter 1, pages 1, 2, 3, 4, 19 and 20. -- Section 25, Chapter 1, pages 1, 2, 7, 8, 13, 14, 41 and 42. -- Section 25, Chapter 2, pages 1, 2, 5, 6, 7, 8, 29, 30, 39 and 40. -- Section 27, Chapter 1, pages 1, 2, 3, 4, 21 and 22. -- Section 31, Chapter 1, pages 1, 2, 3 and 4. -- Section 33, Chapter 1, pages 3 and 4. -- Section 35, Chapter 1, pages 17, 18, 19, 20, 21, 22, 31, 32, 30 and 40. -- Section 35, Chapter 2, pages 1 and 2. -- Section 35, Chapter 4, pages 1, 2, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59 and 60. -- Section 41, Chapter 2, pages 5 and 6. -- Section 44, Chapter 1, pages 1 and 2. -- Section 55, Chapter 1, pages 11 and 12. IMPORTANT NOTES The following pages are newly issued: pages 11 and 12, index. pages 95 and 96, Chapter 1, Section 10. pages 25, 26, 27, 28, 29 and 30, Chapter 1, Section 18. pages 35 to 158, Chapter 3, Section 21. pages 21 to 70, Chapter 1, Section 23. pages 41, 42, 43 and 44, Chapter 2, Sec- tion 25. pages 61 to 148, Chapter 4, Section 35. pages 1 to 132, Chapter 6, Section 35. pages 17 to 26, Chapter 1, Section 55. pages 19 to 34, Chapter 2, Section 55. pages 13 and 14, Chapter 3, Section 55. pages 111 to 276, Chapter 6, Section 55. CNH ITALIA S.p.A. -- Viale delle Nazioni, 55 -- 41100 MODENA -- Italy SERVICE -- Technical Publications & Special Tools Print No. 603.54.351.01 -- 03 -- 2002 -- 400

TN55D --TN55S -- TN65D -- TN65S -- TN70D -- TN70S -- TN75D -- TN75STRACTORS SERVICE MANUAL CROSS--SECTIONAL VIEWS GENERAL GUIDELINES 00 ...................................................... ENGINE 10 ..................................................................... CLUTCH 18 ..................................................................... TRANSMISSIONS 21 ............................................................ DRIVE LINES 23 ................................................................ FRONT MECHANICAL TRANSMISSION 25 ........................................ REAR MECHANICAL TRANSMISSION 27 ......................................... POWER TAKE- OFF 31 .......................................................... BRAKES 33 ..................................................................... HYDRAULIC SYSTEMS 35 ....................................................... STEERING 41 ................................................................... AXLE AND WHEELS 44 .......................................................... CAB AIR CONDITIONING SYSTEM 50 ............................................ ELECTRICAL SYSTEM 55 ........................................................ PLATFORM, CAB, BODYWORK 90 ............................................... S E R V I C E

INTRODUCTION -- This manual is divided into sections identified by two--figure numbers and each section has independent page numbering. For easy reference, these sections have the same numbers and names as the Repairs Rate Book sections. -- The different sections can easily be found by consulting the table of contents on the following pages. -- The document number of the manual and the edition/update dates are given at the bottom of each page. -- Pages updated in the future will be identified by the same document number followed by a two--figure update number (e.g.: 1 st Update 603.54.350.01; 2 nd Update 603.54.350.02; etc.) and by the corresponding issue date. These pages will be supplemented by a reprint of the updated contents page. -- The information contained in this manual was current on the date printed on each section. As NEW HOL- LAND constantly improves its product range, some information may be out of date subsequent to modifica- tions implemented for technical or commercial reasons, or to meet legal requirements in different countries. In the event of conflicting information, consult the NEW HOLLAND Sales and Service Departments. IMPORTANT WARNINGS -- All maintenance and repair work described in this manual must be performed exclusively by NEW HOLLAND service technicians, in strict accordance with the instructions given and using any specific tools necessary. -- Anyone performing the operations described herein without strictly following the instructions is personally responsible for any eventual injury or damage to property. -- The Manufacturer and all organisations belonging to the Manufacturers distribution network, including but not restricted to national, regional or local distributors, will accept no responsibility for personal injury or damage to property caused by abnormal function of parts and/or components not approved by the Manufacturer, including those used for maintenance and/or repair of the product manufactured or marketed by the Manu- facturer. In any case, the product manufactured or marketed by the Manufacturer is covered by no guarantee of any kind against personal injury or damage to property caused by abnormal function of parts and/or components not approved by the Manufacturer. TEXT AND ILLUSTRATIONS ARE THE PROPERTY OF NEW HOLLAND ITALIA S.p.A. No part of the text or illustrations may be reproduced PRINTED IN ITALY CNH ITALIA S.p.A. -- Viale delle Nazioni, 55 -- 41100 MODENA -- Italy SERVICE -- Technical Publications & Special Tools Print No. 603.54.351.01 -- 03 -- 2002 -- 400

CONTENTS 3 603.54.351.01 -- 03 -- 2002 CONTENTS Page Date 00 -- GENERAL GUIDELINES General instructions ..... 1--2 09--98 Safety regulations ....... 3--4 09--98 Safety regulations ....... 5 03--02 Consumables ........... 6 03--02 10 -- ENGINE Summary ............... 1 03--02 General specifications .... 2--3--4 03--02 Fuel system data ........ 5 03--02 Fuel system data ........ 12 09--98 Injection pump calibration and engine performance data ................... 6 03--02 Injection pump calibration and engine performance data ................... 7--8--9--10-- 11 09--98 Engine block data ....... 12 09--98 Crankshaft data ......... 13--14 09--98 Connecting rod data ..... 14 09--98 Piston data ............. 15 03--02 Timing gear data ........ 16 03--02 Timing gear data ........ 17 09--98 Cylinder head data ...... 18 09--98 Lubrication and cooling system data ............ 19 03--02 Tightening Torques ...... 20 03--02 Tools .................. 21--22 03--02 Cross--sectional views of engine ................. 23--24 09--98 Lubrication diagrams ..... 25 09--98 Engine cooling system diagram ................... 26 09--98 Troubleshooting ......... 27--28--29-- 30 09--98 Engine Removal -- Installa- tion .................... 31--32 09--98 Compression test ........ 33 09--98 Page Date Engine Disassembly -- As- sembly ................. 34--35--36-- 37--38--39-- 40--41--42-- 43--44--45-- 46--47--48-- 49--50 09--98 Checks and measure- ments -- cylinder block and liners .................. 51--52 09--98 Checks and measure- ments -- crankshaft, bearings and flywheel ........ 53--54--55-- 56 09--98 Checks and measure- ments -- connecting rods . 57 09--98 Checks and measure- ments -- pistons ......... 58--59--60 09--98 Checks and measure- ments -- camshaft, tappets and valves .............. 61--62--63 09--98 Checks and measure- ments -- cylinder head .... 64 09--98 Re--facing valve seats .... 65 03--02 Checks and measure- ments -- lubrication system 66 03--02 Checks and measure- ments -- lubrication system 67 09--98 Checks and measure- ments -- cooling system .. 68 09--98 Replacing valve guides . . . 69--70--71 09--98 Replacing injector sleeves and support ............. 72--73 09--98 Removal--Installation -- crankshaft front seal ..... 74--75 09--98 Valve clearance adjustment ................... 76--77 09--98 Removal--Installation -- in- jectors ................. 78--79 09--98 Removal -- Installation Bosch injection pump .... 80 09--98 Removal -- Installation Bosch injection pump .... 81--82 03--02 Bosch injection pump -- timing .................... 83--84 03--02

4 CONTENTS 603.54.351.01 -- 03 -- 2002 Page Date Bosch injection pump -- air bleeding ................ 85 09--98 Exhaust pipe. Removal-- Refitting ................ 86 09--98 Removal--Refitting -- coolant pump ............... 87 09--98 Coolant pump overhaul . . . 88 09--98 Removal--Refitting -- ther- mostat valve ............ 89--90 09--98 Removal--Refitting -- radi- ator .................... 91--92--93-- 94 09--98 Injection pump calibration and engine performance data ................... 95--96 03--02 18 -- CLUTCH Main specifications ...... 1--2 03--02 Tightening Torques ...... 2 03--02 Tools .................. 2--3 03--02 Cross--sectional views ... 3--4 03--02 Troubleshooting ......... 5 03--02 Removal--Refitting-- clutch 6--11--12-- 13--14--15 03--02 Removal--Refitting -- clutch 7--8--9--10 09--98 Clutch Overhaul ......... 16 03--02 Clutch Overhaul ......... 17--18--19-- 20 09--98 Checks and measure- ments -- clutch .......... 21--22 09--98 Adjustments -- clutch disen- gagement lever ......... 22--23 09--98 Adjustments -- clutch pedal 24 09--98 PTO control adjustment .. 25 03--02 Sectional view of PTO clutch servo control ...... 26 03--02 Description and operation of PTO servo control ..... 27--28 03--02 PTO servo control adjustment ................... 29 03--02 PTO engaged switch adjustment ................ 30 03--02 Page Date 21 -- TRANSMISSIONS CHAPTER 1 -- Transmission and range gear (16x16) Main specifications ...... 1--2 09--98 Tightening Torques ...... 2--3 09--98 Tools .................. 4--5--6--7 09--98 Cross--sectional views ... 8--9--10--11 09--98 Description and Operation 12 09--98 Troubleshooting ......... 12--13 09--98 Removal--Refitting -- Rear transmission -- gearbox casing ................. 14--15--16-- 17--18--19-- 20 09--98 Disassembly--Assembly -- transmission--gearbox casing .................... 21--22--23-- 24--25--26-- 27--28 09--98 Gearbox driving and driven shafts clearance adjustment. .................. 29 03--02 Sealing compound applica- tion diagram ............ 30 03--02 Gearbox control lever. Re- moval--Refitting ......... 31 09--98 Range gear control lever. Removal--Refitting ....... 32 09--98 Shuttle control lever. Removal--Refitting ....... 33 09--98 Fuel tank. Removal-- Refitting ................ 34--35 09--98 CHAPTER 2 -- Mechanical transmission and splitter Main specifications ...... 1--2 09--98 Tightening Torques ...... 2 09--98 Tools .................. 2 09--98 Cross--sectional views ... 3--4--5 09--98 Description and Operation 6 09--98 Troubleshooting ......... 7 09--98 Splitter device and creeper unit casing, shafts and bearings disassembly .... 8--9--10 09--98

CONTENTS 5 603.54.351.01 -- 03 -- 2002 Page Date CHAPTER 3 -- PowerShuttle transmission with 2 Speed Power Shift Main specifications ...... 1--2 03--02 Tightening Torques ...... 3 09--98 Tools .................. 4--5--6 09--98 Cross--sectional views ... 7--8--9--11 09--98 Cross--sectional views ... 10 03--02 Clutch control pressure test 10 03--02 Description and Operation 12 09--98 Troubleshooting ......... 12 09--98 Disassembly--Assembly -- transmission--gearbox casing .................... 13--14 09--98 Disassembly--Reassembly -- Power Shuttle control valve .................. 15--16--17 09--98 Disassembly--Assembly -- accumulator ............ 18 09--98 Gearbox control valve sole- noid valve. Removal--Refit- ting .................... 19--20 09--98 Disassembly--Assembly -- clutch casing ............ 21--22--23-- 24 09--98 Disassembly--Assembly -- clutch casing ............ 25 03--02 Faults code decoding .... 26 03--02 Calibration .............. 27--28--29-- 30--31--32-- 33--34--35-- 36--37--38-- 39--40--41-- 42--43--44-- 45 03--02 First start--up procedure . . 46 03--02 Diagnostics ............. 47 to 148 03--02 Power Shuttle control unit input/output wiring diagram 150--151-- 152--153 03--02 Description and operation of the control unit ........ 154--155-- 156--157-- 157 03--02 Page Date CHAPTER 4 -- Mechanical transmission (8 + 8 NASO version) Main specifications ...... 1 09--98 Tightening Torques ...... 1 09--98 Tools .................. 1 09--98 Cross--sectional views ... 2--3--4 09--98 CHAPTER 4 -- PowerShuttle transmission (16 + 16 and 8 + 8 versions) Main specifications ...... 1 09--98 Tightening Torques ...... 2 09--98 Cross--sectional views ... 3--4--5--6 09--98 23 -- DRIVELINES Main specifications ...... 1 03--02 Tightening Torques ...... 2 03--02 Tools .................. 3--4 03--02 Cross--sectional views ... 5--6--7 09--98 Description and Operation 8--9 09--98 Troubleshooting ......... 9 09--98 Drive shafts and guard. Disassembly -- Assembly . 10--11--12 09--98 Removal--Refitting -- drive gear casing ............. 13--14 09--98 Disassembly--Assembly -- drive gear casing ........ 15--16--17-- 18 09--98 Faults code decoding .... 19 03--02 Calibration .............. 20--21--22-- 23--24--25-- 26--27 03--02 First start--up procedure . . 28 03--02 Diagnostics ............. 29 to 66 03--02 PTO control unit input/output wiring diagram ....... 68--69 03--02 25 -- FRONT MECHANICAL TRANSMIS- SION CHAPTER 1 -- Front mechanical transmission (super steer axle) Main specifications ...... 1--2 03--02 Main specifications ...... 3 09--98 Tightening Torques ...... 4--5--6 09--98

6 CONTENTS 603.54.351.01 -- 03 -- 2002 Page Date Tools .................. 7--8 03--02 Tools .................. 9 09--98 Cross--sectional views ... 10--11--12-- 13 09--98 Description and Operation 13--14 03--02 Troubleshooting ......... 15 09--98 Removal--Refitting -- front axle ................... 16--17--18-- 19 09--98 Removal--Installation -- front axle bevel drive support and differential ...... 20--21--22-- 23 09--98 Overhaul -- front axle bevel drive ................... 24--25 09--98 Adjustments -- bevel drive 26--27--28-- 29--30--31 09--98 Overhaul -- front differential 32 09--98 Overhaul -- differential lock unit .................... 33--34--35 09--98 Disassembly--Assembly -- front epicyclic final drive with brake .............. 36--37--38-- 39 09--98 Disassembly--Assembly -- front epicyclic final drive . . 40--43 09--98 Disassembly--Assembly -- front epicyclic final drive . . 41--42 03--02 Disassembly--Assembly -- wheel hubs and steering knuckle ................ 44 09--98 Adjustments -- steering knuckle bearings ........ 45 09--98 Replacing steering knuckle pins and bearings ....... 46 09--98 CHAPTER 2 -- Front mechanical transmission Main specifications ...... 1--2 03--02 Main specifications ...... 3 09--98 Tightening Torques ...... 3--4 09--98 Tools .................. 5--6 03--02 Cross--sectional views ... 7--8 03--02 Description and Operation 8--9 09--98 Troubleshooting ......... 10 09--98 Page Date Removal--Refitting -- front axle ................... 11--12--13-- 14 09--98 Front axle. Disassembly -- Assembly .............. 15--16--17-- 18--19--20-- 21--22--23 09--98 Overhaul -- differential lock unit .................... 24--25 09--98 Replacing steering knuckle pins and bearings ....... 26 09--98 Adjustments -- steering knuckle bearings ........ 27--28 09--98 Adjustments -- bevel drive 29--30 03--02 Adjustments -- bevel drive 31--32--33-- 34--35 09--98 Overhaul -- front differential 36 09--98 LIM--SLIP self--locking differential ................ 37--38 09--98 Checking leading wheels alignment .............. 39 03--02 Disassembly--Assembly -- front epicyclic final drive . . 40--41 03--02 Disassembly--Assembly -- front epicyclic final drive with brake .............. 42--43--44 03--02 27 -- REAR MECHANICAL TRANSMISSION Main specifications ...... 1--2 03--02 Tightening Torques ...... 3--4 03--02 Tools .................. 5--6--7--8 09--98 Cross--sectional views ... 9--10 09--98 Description and Operation 11--12 09--98 Troubleshooting ......... 12--13 09--98 Disassembly--Assembly -- transmission--gearbox casing ................. 14--15--16-- 17--18--19 09--98 Adjustment -- differential lock engagement sleeve position ................ 20 09--98 Adjustments -- bevel drive 21--22 03--02 Adjustments -- bevel drive 23--24--25 09--98

CONTENTS 7 603.54.351.01 -- 03 -- 2002 Page Date Removal--Refitting -- side gear casing ......... 26--27--28-- 29 09--98 Disassembly--Assembly -- drive wheel shaft ........ 29--30--31 09--98 Disassembly--Assembly -- epicyclic reduction gear .. 31 09--98 31 -- POWERTAKE--OFF CHAPTER 1 -- Mechanical powertake--off Main specifications ...... 1--2--3 03--02 Tools .................. 3--4 03--02 Tightening Torques ...... 5--6 09--98 Cross--sectional views ... 7--8 09--98 Description and Operation 9--10--11 09--98 Troubleshooting ......... 11 09--98 Disassembly -- Assembly -- power take--off .......... 12--13--14-- 15 09--98 33 -- BRAKES Main specifications ...... 1--2 09--98 Tightening Torques ...... 2 09--98 Cross--sectional views ... 3--4 03--02 Cross--sectional views ... 5 09--98 Tools .................. 5--6 09--98 Description and Operation 6 09--98 Troubleshooting ......... 7--8 09--98 Removal--Refitting -- service brake .............. 9--10 09--98 Removal--Refitting -- service brake pump ......... 11--12--13-- 14 09--98 Adjustments -- service brake pedals travel ...... 15--16 09--98 Service brake circuit air bleeding ................ 16--17--18 09--98 Removal--Refitting -- parking brake ............... 19--20 09--98 Adjustments -- parking handbrake travel ........ 20 09--98 Page Date 35 -- HYDRAULIC SYSTEMS CHAPTER 1 -- Rearmechanical hydraulic lift Main specifications ...... 1--2--3 09--98 Tightening Torques ...... 3--4 09--98 Tools .................. 5--6 09--98 Cross--sectional views ... 7--8--9--10-- 11 09--98 Description and Operation 12--13--14-- 15 09--98 Troubleshooting ......... 16 09--98 Troubleshooting ......... 17 03--02 Lift internal controls. Disas- sembly -- Assembly ...... 18--19--20-- 21 03--02 Adjusting the lift ......... 22--31 03--02 Adjusting the lift ......... 23--24--25-- 26--27--28-- 29--30 09--98 Lift cylinder and arms shaft. Disassembly -- Assembly . 32 03--02 Lift cylinder and arms shaft. Disassembly -- Assembly . 33--34--35 09--98 Disassembly--Assembly -- lift control valve ......... 36--37--38 09--98 Disassembly--Assembly -- lift control valve ......... 39 03--02 Lift pressure relief valve . . 40 03--02 CHAPTER 2 -- Open centre system auxiliary control valves Main specifications ...... 2 03--02 Tools .................. 2 03--02 Tightening Torques ...... 2 03--02 Cross--sectional views ... 3--4--5 09--98 Description and Operation 5--6--7--8 09--98 Lift electronic control unit. Replacement ........... 9 09--98 Control valves. Disassem- bly -- Assembly .......... 10--11--12 09--98

8 CONTENTS 603.54.351.01 -- 03 -- 2002 Page Date CHAPTER 3 -- Trailerbrakes auxiliary control valves Cross--sectional views ... 1 09--98 Description and Operation 1--2--3--4--5 --6--7 09--98 Troubleshooting ......... 8--9--10 09--98 Removal--Refitting -- trailer brake valve ............. 11 09--98 CHAPTER 4 -- Electronically controlled hydraulic lift Main specifications ...... 2--3 03--02 Tightening Torques ...... 4 09--98 Tools .................. 4--5--6 09--98 Cross--sectional views ... 7--8--9 09--98 Location of parts ........ 10--11 09--98 Description and Operation 12--13--14-- 15--16--17-- 18 09--98 Removal--Installation -- lift. 19--20--21-- 22--23 09--98 Draft sensor support. Removal--Refitting ....... 24 09--98 Replacement -- control unit 25 09--98 Lift arm potentiometer. Re- placement .............. 26--27 09--98 Replacement -- draft sensor .................... 28--29--30 09--98 Electronically controlled hydraulic lift. Disassembly -- Assembly ............. 31--32--33-- 34--35 09--98 Removal--Installation -- hydraulic control valve ...... 36 09--98 Hydraulic control valve. Disassembly -- Assembly . 37--38 09--98 Hydraulic control valve. Disassembly -- Assembly . 39 03--02 Lift calibration ........... 40--41 03--02 Connecting calibration in- strument 294084 to the lift diagnosis socket ........ 42 03--02 Faults code decoding .... 43 03--02 Page Date Electronic lift calibration .. 44--45--46-- 47--48--49-- 50--51--52-- 53--54--55-- 56 03--02 First start--up procedure . . 57 03--02 Diagnostics ............. 58 to 145 03--02 Electronic lift control unit input/output wiring diagram 146--147 03--02 CHAPTER 5 -- Non--stop flow gearpump Main specifications ...... 2--3 09--98 Diagrams ............... 3 09--98 Description and Operation 3 09--98 Disassembly--Assembly -- lift oil pump ............. 4 09--98 CHAPTER 6 -- Electronic lift and front Power Take--Off Main specifications of front lift ..................... 1--2--3 03--02 Tightening Torques ...... 3--4--5 03--02 Cross--sectional views of implement linkage ....... 6--7 03--02 Cross--sectional views of front PTO .............. 8--9--10 03--02 Description and Operation 11--12--13-- 14 03--02 Front lift hydraulic diagram 15 03--02 Front lift troubleshooting . . 16--17 03--02 Removal--Refitting -- Front power take--off transmission shaft ........... 18--19--20-- 21--22--23-- 24--25 03--02 Disassembly--Assembly -- Front PTO transmission shaft ................... 26 03--02 Front PTO casing cross-- sectional view ........... 27 03--02 Removal--Refitting -- Front PTO electromagnetic coupling ................ 28--29--30 03--02 Disassembly--Assembly -- Front PTO electromagnetic coupling ................ 31--32--33-- 34 03--02

New Holland TN55D/TN55S/TN65D/TN65S/TN70D/TN70S/TN75D/TN75S Tractors OEM Service & Repair Manual

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