2. 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., 1st Update 603.54.511.01; 2nd Update 603.54.511.02; 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 HOLLAND
constantly improves its product range, some information may be out of date subsequent to modifications im-
plemented 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 re-
sponsible 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 dam-
age 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 Manufac-
turer.
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 CNH 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
Product Support -- Technical Information
Print No. 603.54.511.00 -- 03 -- 2006
13. SECTION 00 -- GENERAL GUIDELINES -- CHAPTER 1 1
603.54.511.00 -- 03 -- 2006
GENERAL INSTRUCTIONS
IMPORTANT NOTICE
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 re-
sponsible for any eventual injury or damage to property.
SHIMMING
For each adjustment operation, select adjusting shims and measure individually using a micrometer, then add
up the recorded values. Do not rely on measuring the entire shimming set, which may be incorrect, or the rated
value indicated for each shim.
ROTATING SHAFT SEALS
For correct rotating shaft seal installation, proceed as follows:
-- before assembly, allow the seal to soak in the oil it will be sealing for at least thirty minutes;
-- thoroughly clean the shaft and check that the working surface on the shaft is not damaged;
-- position the sealing lip facing the fluid; with hydrodynamic lips, take into consideration the shaft rotation direc-
tion and position 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 it is perpendicular to the seat; once settled, make sure that it makes con-
tact with the thrust element, if required;
-- to prevent damaging the seal lip on the shaft, position a protective guard during installation operations.
“O--RING” SEALS
Lubricate the O--RING seals before inserting them in the seats, this will prevent them from overturning and twist-
ing, which would jeopardise sealing efficiency.
SEALING COMPOUNDS
Apply one of the following sealing compounds on the mating surfaces marked with an X: RTV SILMATE, RHO-
DORSIL CAF 1 or LOCTITE PLASTIC GASKET.
Before applying the sealing compound, prepare the surfaces as follows:
-- remove any incrustations using a wire brush;
-- thoroughly de--grease the surfaces using one of the following cleaning agents: trichlorethylene, petrol or a
water and soda solution.
14. 2 SECTION 00 -- GENERAL GUIDELINES -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
BEARINGS
When installing bearings it is advised to:
-- heat the bearings to 80 ÷ 90 °C before fitting on the shafts;
-- allow the bearings to cool before installing them.
SPRING PINS
When fitting split socket spring pins, ensure that the pin notch is positioned in the direction of the force required
to stress the pin.
Spiral spring pins do not require special positioning.
SPARE PARTS
Use solely genuine parts, which guarantee the same quality, duration and safety as the original parts as they
are identical to the ones fitted during production.
Only genuine parts can offer this guarantee.
When ordering spare parts, always provide the following information:
-- tractor model (commercial name) and frame number;
-- engine type and number;
-- part number of the ordered part, which can be found in the “Microfiches” or the “Spare Parts Catalogue”, used
for order processing.
TOOLS
The tools that NEW HOLLAND offer and illustrate in this manual are:
-- specifically researched and designed for use with NEW HOLLAND vehicles;
-- essential for reliable repair operations;
-- accurately built and rigorously tested so as 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.
IMPORTANT NOTES
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 seen from the driving position with the
vehicle in the normal direction of movement.
MOVING THE TRACTOR WITH THE BATTERY REMOVED
External power supply cables should only be connected to the respective positive and negative cable terminals,
using efficient clamps that guarantee adequate and secure contact.
Disconnect all services (lights, windshield wipers, etc.) before starting the vehicle.
If the vehicle electrical system requires checking, carry out operations with the power supply connected. Once
checking is completed, disconnect all services and switch off the power supply before disconnecting the cables.
19. 14 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
MIF1096A
1
View of TL70A tractor engines of 53 kW (70 HP) and TL80A of 60 kW (80 HP)
20. SECTION 10 -- ENGINE -- CHAPTER 1 15
603.54.511.00 -- 03 -- 2006
MIF1097A
model TL90A
2
View of TL90A tractor engines of 67 kW (90 HP) and TL100A of 73.5 kW (100 HP)
21. 16 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
MIF1098A
Oil path under pressure
Oil return path under gravity
3
Lubrication diagram for engines mod. TL90A and TL100A
Forced--circulation lubrication is accomplished by the
following components:
-- oil pump, housed at the front of the crankcase,
driven by the grooved bushing keyed onto the
shank of the crankshaft;
-- water / oil cooler, housed in the crankcase;
-- oil pressure control valve incorporated in the
cooler assembly;
-- by--pass valve to cut off clogged oil filter, incorpo-
rated in the cooler assembly;
-- cartridge oil filter.
NOTE: Engines mod. TL70A and TL80A do not have
a turbocharger lubrication circuit.
22. SECTION 10 -- ENGINE -- CHAPTER 1 17
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MIF1099A
Coolant recirculating in the engine
Coolant entering the pump
4
Cooling system diagram
The forced circulation, closed--circuit engine cooling
system is composed of the following components:
-- a lubricating oil cooler;
-- a centrifugal coolant pump housed at the front of
the crankcase;
-- a thermostat valve governing coolant circulation.
23. 18 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
MIF1100A
5
Detail of cylinder head with valve seats fitted in engines mod. TL70A -- TL80A
1. Exhaust manifold
2. Intake manifold
3. Air heater
4. Fitted valve seats
5. Thermostat valve
6. Injector
24. SECTION 10 -- ENGINE -- CHAPTER 1 19
603.54.511.00 -- 03 -- 2006
MIF1101A
6
Detail of cylinder head with valve seats fitted in engines mod. TL90A -- TL100A
1. Exhaust manifold
2. Intake manifold
3. Air heater
4. Fitted valve seats
5. Thermostat valve
6. Injector
26. SECTION 10 -- ENGINE -- CHAPTER 1 25
603.54.511.00 -- 03 -- 2006
Op. 10 001 10
ENGINE R.I.
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 bonnet (1) as described in operation
9010022.
2. Disconnect the battery negative lead.
3. Drain the oil from the transmission--gearbox
housing. 8
4. Remove the three retaining bolts (1) and the
guard (2) on the right--hand side of the fan.
9
5. Detach the fitting (3) of the return pipe (2) for the
coolant from the cab heater radiator connected to
the underside of the coolant pump (1) and drain
off the engine coolant.
10
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28. 26 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
6. Remove the catch (2) and detach the toolbox (1).
11
7. Remove the split pins, retaining pin (3) and front
ballast (2) together with the support (1).
12
8. Unscrew the front central and rear retaining bolts
on the front axle shaft guard, then remove the
guard (1).
25038
1
13
9. Remove the circlip (2) and move the front sleeve
(1) in the direction indicated by the arrow until it
is released from the groove on the front axle.
25039
1 2
14
29. SECTION 10 -- ENGINE -- CHAPTER 1 27
603.54.511.00 -- 03 -- 2006
10. Remove the circlip (2) and move the rear sleeve
(1) in the direction indicated by the arrow until it
is released from the groove on the drive.
25040
1
2
15
11. Remove the propeller shaft central support (1)
retaining bolts and extract the shaft together with
the support.
1
25041
16
12. Remove the retaining bolts (1) of the draw pipe
(2) of the lift pump.
17
13. Detach the fitting (1) of the power steering/four--
wheel drive drain pipe on the left--hand side of the
engine.
18
30. 28 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
14. Detach the fitting (1) of the power steering/four--
wheel drive drain pipe on the right--hand side of
the engine.
19
15. Take out the bolt (1) retaining the bracket and the
power steering/four--wheel drive drain pipe on the
right--hand side of the engine (2).
20
16. Remove the two metal clamps (2) and the rigid
pipe (1) for drawing oil from the transmission via
the pumps of the lift and power steering.
21
17. Remove the fitting (1) of the delivery pipe of the
services pump on the right--hand side of the en-
gine.
22
31. SECTION 10 -- ENGINE -- CHAPTER 1 29
603.54.511.00 -- 03 -- 2006
18. Working on the left--hand side of the engine, take
out the retaining bolts (2) and detach the draw
pipe (1) of the lift pump.
23
19. Extract the plastic fasteners (2) and detach the
diesel recovery pipe (3) and delivery pipe (4) to
the diesel pump (1).
24
20. Disconnect the electrical connections (1) and (2)
between the cab and the engine.
25
21. Disconnect the electrical connection (1) between
the cab and the engine.
26
32. 30 SECTION 10 -- ENGINE -- CHAPTER 1
603.54.511.00 -- 03 -- 2006
22. Disconnect the two power steering oil delivery
and return hoses (1).
1
24879
27
23. Remove the four knobs (1) and take off the two
right-- and left--hand dashboard panels (2).
MDD2562A
1 2
28
24. Extract the differential lock pedal retaining pin
from the drive shaft (1), remove the pedal and
footboard (2).
25043
1
2
29
25. Remove the four plugs (1) in order to gain access
to the engine upper retaining bolts.
30
33. SECTION 10 -- ENGINE -- CHAPTER 1 31
603.54.511.00 -- 03 -- 2006
26. Remove the retaining clips (1) and detach the
flexible cables governing the hand throttle (5) and
pedal throttle (4).
27. Remove the retaining clip (3) and detach the
throttle control tie--rod (2) connected to the injec-
tion pump.
31
28. Detach the fitting (2) and the hose (1) delivering
power steering oil to the hydraulic cylinders
governing the front wheel steering.
32
29. Detach the clamp (1) and the cab heater delivery
pipe (2).
33
30. Detach the clamp (2) and the cab heater return
pipe (1).
34