New Holland TN75FA Manuel utilisateur

TN75FA – TN85FA – TN95FA TRACTORS

SERVICE MANUAL

SECTIONS

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T E C H N I C A L S U P P O R T

SECTION 10 -- ENGINE -- CHAPTER 1 31

603.54.451.00 -- 01 -- 2004

Op. 10 001 10

ENGINE Removal--Installation

DANGER

Lift and handle all heavy parts using suitable lifting

equipment.

Make sure that assemblies or parts are supported by

means of suitable slings and hooks. Check that no

one is in the vicinity of the load to be lifted.

CAUTION

Always use appropriate tools to align fixing holes.

NEVER USE FINGERS OR HANDS.

1. Remove the cab following the instructions in

Section 90 Chapter 1.

2. Drain the oil from the rear transmission--gearbox

housing.

3. Unscrew the clamps and disconnect the fuel re-

turn hose (1) to the tank (2) and the fuel supply

pump inlet hose.

25659

4. Remove the retaining bolts and detach the rear

guard (1).

25643

5. Position bracket 380001613 (1) and secure it to

the engine and axle.

25544

32 SECTION 10 -- ENGINE -- CHAPTER 1

603.54.451.00 -- 01 -- 2004

6. Unscrew the two rear nuts (1) retaining the front

guard. 1

25644

7. Position a hydraulic jack under the front guard.

Unscrew the bolts (3) securing the brackets (1

and 2) and the screw retaining the bottom pivot

pin (4). Extract this pin and remove the above--

mentioned bracket (2).

25547

234

8. Extract the two rear screws and lower the hy-

draulic jack. Retrieve the guard (1) and bracket

(2). 12

25645

9. Remove the circlip (2) and move the rear sleeve

forwards (1). 1 2

25646

SECTION 10 -- ENGINE -- CHAPTER 1 33

603.54.451.00 -- 01 -- 2004

10. Remove the circlip (2) and move the front sleeve

forwards (1).

25647

1 2

11. Unscrew the bolts retaining the bearing support

(1) to the clutch housing and retrieve the drive

shaft together with the support.

25648

12. Disconnect the service control valve supply pipe

(1) and the front differential locking control pipe

(2).

25660

13. Disconnect the service brake control pipe (1) and

trailer brake valve control pipe (2). 1

25661

34 SECTION 10 -- ENGINE -- CHAPTER 1

603.54.451.00 -- 01 -- 2004

14. Remove the drain plug (1) and retrieve the diesel

in a suitable container.

25629

15. Disconnect the trailer brake control pipe (1) and

the pipe (2) connecting the auxiliary control

valves to the lift control valve.

16. Unscrew the clamp and disconnect the hydraulic

pump inlet pipe (1).

25662

17. Loosen the clamp and detach the sleeve (1) from

the relevant pipe, which you should then detach

from the front tank and remove.

25630

18. Unscrew the relevant clamps, detach the ther-

mostarter connections and remove the sleeve

(1) coupling the air filter to the intake manifold. 1

25663

SECTION 10 -- ENGINE -- CHAPTER 1 35

603.54.451.00 -- 01 -- 2004

19. Detach the sleeves (1 and 3) from the radiator

and unscrew the bracket (2) securing the radiator

to the engine.

20. Place a fixed stand under the engine, taking care

not to dent the oil sump plating.

25664

21. Connect a nylon rope (2) to the axle support and

to the hoist. Tension the rope and detach the

union (1) from the front hydraulic pump.

25665

22. Remove the retaining bolts (1) from both of them

and detach the axle support.

25666

23. Remove the bolts, retaining clamps and exhaust

silencer assembly (1). 1

25667

36 SECTION 10 -- ENGINE -- CHAPTER 1

603.54.451.00 -- 01 -- 2004

24. Loosen the clamp (3), unscrew the retaining

bolts (1) and remove the vapour recirculation de-

vice (2).

25668

1 2 3

25. Place a fixed stand under the clutch housing.

Connect a chain to the engine and hoist. Tension

the chain. Unscrew the bolts (1) securing the en-

gine to the clutch housing and remove the en-

gine.

26. Refit the engine taking the following into con-

sideration

CAUTION

Always use appropriate tools to align fixing holes.

NEVER USE FINGERS OR HANDS.

25669

-- Apply the torque settings listed on page 20.

-- Before refitting the engine to the clutch box care-

fully clean the mating surfaces and apply sealing

compound (0.0787 in. (2 mm) diameter), accord-

ing to the diagram shown Section 21, Chapter 1,

page 34.

-- Fit the engine on the clutch casing.

-- Fit the vapour recirculation device.

-- Fit the exhaust silencer assembly.

-- Refit the axle support to the engine and fit the

union on the front hydraulic pump.

-- Connect and secure the sleeves to the radiator.

Lock the bracket securing the radiator to the en-

gine.

-- Fit the sleeve connecting the air filter to the intake

manifold.

-- Fit the fuel tank connection piping.

-- Connect the hydraulic pump inlet piping and the

pipes governing the trailer brake and connecting

the auxiliary control valves to the lift.

-- Fit the fuel tank plug.

-- Connect the service brake and trailer brake valve

control pipes.

-- Connect the differential lock and service control

valve supply pipes.

-- Refit the drive shaft and relevant guards.

-- Remove bracket 380001613 securing the engine

and front axle.

-- Refit the fuel inlet and return pipes.

-- Screw the drain plugs onto the transmission

housing and onto the diesel tank and replenish

them (for the prescribed product and quantity,

see page 6 sect. 00).

-- Refit the cab following the instructions in Sec-

tion 90, Chapter 1.

SECTION 10 -- ENGINE -- CHAPTER 1 37

603.54.451.00 -- 01 -- 2004

Op. 10 001 54

ENGINE Disassembly -- Assembly

CAUTION

Handle all parts carefully.

Do not put your hands or fingers between parts.

Wear the prescribed safety clothing, including

goggles, gloves and safety footwear.

Proceed as follows.

1. Disconnect the pipe (1) from the seat of the ther-

mostatic valve, loosen the bolts securing the al-

ternator and remove the fan drive belt (2). 25670

2. Remove the retaining bolts and retrieve the fan

(1), spacer and driving pulley (2). Detach the re-

turn pipe (3) from the coolant pump.

25671

3. Take out the retaining bolts and remove the cool-

ant pump (1).

25672

4. Take out the retaining bolts and detach the cool-

ant pump support (1).

25673

38 SECTION 10 -- ENGINE -- CHAPTER 1

603.54.451.00 -- 01 -- 2004

5. Secure the bracket (1), series 380000313,tothe

engine and lock this on the rotary stand

380000301.

25674

6. Disconnect the pipes (1 and 2) from the crank-

case and from the hydraulic pump governing the

services.

25675

7. Disconnect the thermostarter supply pipe (1) and

the return pipe (2) from the thermostarter and

from the injectors.

25676

1 2

8. Unscrew the unions (2 and 3) from the injection

pump and from the fuel pump. Take out the re-

taining bolts and remove the fuel filter (1) to-

gether with the support and pipes.

25677

1 2

SECTION 10 -- ENGINE -- CHAPTER 1 39

603.54.451.00 -- 01 -- 2004

9. Unscrew the retaining bolts and remove the ther-

mostatic valve assembly (1). 1

25678

10. Unscrew the retaining bolts and remove the al-

ternator (1) together with the support (2).

25679

11. Unscrew the retaining bolts and remove the ex-

haust manifold (1).

12. Unscrew the engine oil filter (2).

25680

13. Disconnect the pipes (2) from the injection pump

and from the injectors.

14. Unscrew the retaining bolts and remove the inlet

manifold (1).

25681

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