New Holland TT45A Operating instructions

87655301 3/07
1st Printing
©2007 CNH America LLC
Printed In U.S.A.
TT45A, TT50A
REPAIR MANUAL
COMPLETE CONTENTS
SECTION 00 - GENERAL 2............................................
SECTION 10 - ENGINE 3..............................................
SECTION 18 - CLUTCHES 10...........................................
SECTION 21 - TRANSMISSION SYSTEM 11..............................
SECTION 27 - MECHANICAL REAR WHEEL DRIVE 13....................
SECTION 31 - POWER TAKE-OFF 15....................................
SECTION 33 - BRAKING SYSTEM 16....................................
SECTION 35 - HYDRAULIC SYSTEM 16..................................
SECTION 41 - STEERING SYSTEMS 19..................................
SECTION 44 - FRONT AXLE 20.........................................
SECTION 55 - ELECTRICAL SYSTEM 21.................................
SECTION 90 - BODYWORK 27..........................................
The following pages are the collation of the contents pages from each section and
chapter of the TT45A, TT50A Repair manual. Complete Repair part # 87655297.
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 TT45A, TT50A Tractors.

SECTION 10 -- ENGINE -- CHAPTER 1
10-25
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3
49
8
5
2
5
SEPARATING THE TRACTOR AT THE
CLUTCH HOUSING/ENGINE –
8x2TRANSMISSION
Disassembly
1. Disconnect the negative (--) battery cable, and
the positive (+) battery cable from the battery, 1.
2. Disconnect the headlight wiring harness, 2, and
remove the hood, 3.
3. If equipped, remove the remote loader control
valve, and all the connecting hydraulic tubes
from the right side loader tower.
4. Remove the LH and RH engine side covers, 4.
5. Remove the LH, RH and center rear hood
panels, 5.
6. Remove the steering wheel, 6.
7. Remove the instrument panel, 7, from the dash
housing. Disconnect all electrical connectors
from the instrument panel.
8. Remove the dash housing, 8, from the firewall.
Disconnect all electrical connectors from the
dash housing.
9. Disconnect electrical harness to the starter, 9.

SECTION 10 -- ENGINE -- CHAPTER 1
10-26
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15
14
12
11
6
10. Disconnect and remove the throttle cable from
the dash mounted throttle control lever, 10.
11. Disconnect and remove the throttle cable from
the foot control pedal, 11.
12. Drain fuel from fuel tank, 12, into a suitable
container. Remove fuel tank from firewall.
13. Remove the firewall, 13, from the tractor.
14. Disconnect all hydraulic tubes 14, to the
hydraulic pump, 15.

SECTION 10 -- ENGINE -- CHAPTER 1
10-27
15. Attach a chain sling to the two hoist eyes, 1.
16. Attach a suitable hoist to the chain sling.
NOTE: The hoist is used for supporting the engine
and axle assembly, not necessarily for lifting.
17. Roll a floor jack under the rear of the tractor, and
place under the clutch housing. Raise the jack
enough to support the drive train.
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7
18. Remove the buckle-up bolts, 1, and starter, 2,
that secure the engine, 3, to the clutch housing,
4.
NOTE: The hoist and/or floor jack may need to be
raised or lowered to allow for separation of the
engine and clutch housing.
19. Carefully roll the drive train away from the
engine, using the floor jack for support.
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8

SECTION 10 -- ENGINE -- CHAPTER 1
10-28
SEPARATING THE TRACTOR AT THE
ENGINE/FRAME
Removal
1. Use jack stands under the frame rails to support
the front frame/engine assembly.
WARNING
Make sure the front frame/engine assembly is
securely supported before removing the engine.
2. Remove the chain sling from the two hoist eyes
on the engine.
3. Drain the hydraulic fluid from the power steering
reservoir, 1, into a suitable container. Remove
the reservoir, 1, and mounting bracket from the
engine.
1
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4. Remove the air cleaner assembly, 1, from the
tractor.
5. Remove the muffler and tailpipe assembly, 2,
from engine.
6. Loosen the lower radiator hose, 3, and drain the
coolant into a suitable container.
7. Remove the lower, 3, and upper, 4, radiator
hoses.
8. Remove the radiator, 5, from the tractor.
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10

SECTION 10 -- ENGINE -- CHAPTER 1
10-29
9. Attach a chain sling to the two hoist eyes, 1.
10. Attach a suitable hoist to the chain sling, and
raise the engine enough to support the engine.
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11
11. Loosen and remove the engine mounting bolts,
1, on both sides of the frame.
12. Carefully lift the engine from the frame.
13. Attach the engine to a suitable engine stand.
14. With the engine securely attached to the engine
stand, remove the chain sling from the two
engine hoist eyes.
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12
Installation
1. Attach a chain sling to the two hoist eyes.
2. Attach a suitable hoist to the chain sling, and
raise the engine enough to support the engine.
3. Remove the engine from the engine stand.
4. Using a hoist, position the engine in the frame,
aligning the mounting holes in the frame with the
mounting holes in the engine.
5. Install the engine mounting bolts, 1, on both sides
of the frame. Tighten the mounting bolts to 139 –
175 N⋅m (102 – 129 ft-lb).
6. With the engine securely installed into the frame,
remove the chain sling from the two engine hoist
eyes.
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13

SECTION 10 -- ENGINE -- CHAPTER 1
10-30
7. Reinstall the radiator, 1, into the tractor.
8. Reinstall the lower, 2, and upper, 3, radiator
hoses.
9. 9. Fill the radiator, 1, with new coolant to the
proper level.
10. Reinstall the muffler and exhaust pipe, 4, onto
the exhaust manifold.
11. Reinstall the air cleaner assembly, 5, onto the
engine.
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4
5
3
14
12. Reinstall the power steering reservoir and
mounting bracket, 1, onto the engine. Reconnect
the hydraulic lines to the reservoir.
13. Refill the reservoir to the proper level with Ambra
Multi G 134.
1
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ATTACHING THE TRACTOR AT THE
CLUTCH HOUSING/ENGINE --
8x2TRANSMISSION
Assembly
WARNING
Do not use the buckle-up bolts to draw the drive
train together with the engine. Severe damage to
the drive train may result.
1. Attach a chain sling to the two hoist eyes, 1.
2. Attach a suitable hoist to the chain sling.
3. Carefully roll the drive train into alignment with
the engine. Align the splines on the 8 x 2 input
shaft with the clutch and the engine flywheel.
Rotate the engine fan to align the input shaft and
the clutch/flywheel. The floor jack or hoist may be
needed to raise or lower the engine to make
alignment possible.
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SECTION 10 -- ENGINE -- CHAPTER 1
10-31
4. Connect the clutch housing, 1, to the engine, 2,
and install the bucket-up bolts, 3.
5. Reinstall the starter, 4, and secure with the
retaining nuts. Connect the wiring harness, 5, to
the starter.
6. Tighten the buckle-up bolts, 3, in a criss--cross
pattern. Torque the M10 bolts and nuts to 68 N⋅m
(50 ft-lb) Torque the two M12 bolts to 81 N⋅m(60
ft-lb).
7. Remove the chain hoist and sling from the engine
hoist eyes. Remove the floor jack from under the
tractor. 86071895
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1
2
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SECTION 10 -- ENGINE -- CHAPTER 1
10-32
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2
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5
18
8. Reconnect all hydraulic tubes, 1, to the hydraulic
pump, 2.
9. Reattach the firewall, 3, to the tractor.
10. Reattach the fuel tank, 4, to the firewall.
Reconnect fuel lines to the fuel shut--off valve
and tank vent.
11. Reattach the throttle cable to the foot control
pedal, 5.
12. Reattach the throttle cable to the dash mounted
throttle control lever, 6.

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