FiatAllis 745, 745H wheel loaders service manual – PDF DOWNLOAD

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 FiatAllis 745, 745H wheel loaders service manual – PDF DOWNLOAD

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FiatAllis 745, 745H wheel loaders service manual – PDF DOWNLOAD

Language :English
Pages :290
Downloadable : Yes
File Type : PDF

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FiatAllis 745, 745H wheel loaders service manual – PDF DOWNLOAD

FOREWORD

• This service manual provides information, illustrations and tool require­ ments which service personnel should use when performing repair or maintenance operations for the transmission. This manual also provides information on the removal and replacement of the transmission.
• To assure best results and maintain original quality always use Fiat-Allis parts. Many equipment owners employ the dealers’ service department for all work other than routine lubrication, adjustments and minor service. This practice is encouraged, as our dealers are well informed and equipped to render factory approved service. This manual may not be reprinted or reproduced, either in whole or in part without written permission of Fiat-Allis.

TABLE OF CONTENTS:

FiatAllis 745, 745H wheel loaders service manual – PDF DOWNLOAD

Forward
Index
I General
II General Description
A Low-Range (F-1), Reverse Range (R) Gearing and Clutches
B High-Range (F-2) Clutch
C Output Transfer Gears, Shafts
1 Gears
2 Output Yokes
3 Parking Brake
4 Accessory Pump Mount
5 Oil Strainer
6 Main-Pressure Regulator, Selector Valves
7 Clutch Cutoff Valve
8 Operating Instructions (TT & TRT)
9 Lubrication, Converter Regulator Valves
10 Transmission, Converter Housing and Front Cover
D Data Specifications – Model TT 4420-1
m Description of Operation
A Operation
· B Torque Paths through Transmission (TT)
1 Functions
2 Cutaway illustrations
3 Torque Converter & Freewheel Clutch
4 Torque Path Through Converter to Forward and Reverse Sun Gear
a First Turbine
b Second Turbine
5 Neutral & Power Takeoff – Torque Path
6 Low-Range (F-1), First Turbine – Torque Path
7 High-Range (F-2), Second Turbine – Torque Path
8 Reverse Range (R), First Turbine – Torque Path
IV Preventive Maintenance
A General
1 Cleaning Breather
2 Cleaning Oil Strainer
3 Metal Particles In Oil
4 Oil Check
5 Frequency of Maintenance
6 Transmission Fluid (Symbol TF)
7 Change Oil
8 Filling Oil System
9 Pressures, Temperatures
10 S~lector Linkage
11 Parking Brake
B Transmission Stall Test
1 Purpose
2 Procedure
3 Results
V Trouble Shooting
A General
1 Low Main Pressure
2 Overheating
3 Low Clutch Apply Pressure
4 Aerated Oil (foaming)
5 Vehicle Will Not Travel
6 Vehicle Travels In Neutral When Engine is Accelerated
7 Clutch Cutoff Valve Ineffective
8 Vehicle Lacks Power and Acceleration at Low-Speed
VL General Overhaul
A General
B Tools, Equipment ~eeded
C Replacement Parts
D Careful Handling
E Cleaning, Inspection
1 General
2 Cleaning Parts
3 Cleaning Bearings
4 Keeping Bearings Clean
5 Inspecting Cast Parts, Machined Surfaces
6 Inspecting Bearings
7 Inspecting Bushings, Thrust Washers
8 Inspecting Oil Seals, Gaskets
9 Inspecting Gears
10 Inspecting Splined Parts
fl Inspecting Threaded Parts
12 Inspecting Snap Rings
13 Inspecting Springs
14 Inspecting Clutch Plates
vn Transmission Removal & Installation (TT & TRT)
vm
A Removal
B Installation
Disassembly
A Accessory Drive
B Oil Strainer Assembly
C Parking Brake, Front & Rear Yokes
D Control Valve Assembly
E Flex Disk & Converter Drive
F Torque Converter
G Oil Pump Assembly
H Torque Converter Housing
L Freewheel Clutch Assembly
J First Turbine Drive Gear
K Rear Cover, High-Range Clutch
L Low-Reverse-Range Clutches, Planetaries
M One-Piece Shaft Without Disconnect (TT only)
IX Rebuild of Subassemblies
A First & Second Turbine Assembly (Rebuild) TT & TRT
1 Disassembly
2 Assembly ,
B Torque Converter Pump Assembly· (Rebuild) TT & TRT
1 Disassembly
2 Assembly
C Charging Oil Pump Assembly (Rebuild) TT & TRT
1 Disassembly
2 Assembly
D Torque Converter Housing Assembly (Rebuild) TT & TRT
1 Disassembly
2 Assembly
E Turbine Driven Gears and Freewheel Assembly (Rebuild) (TT only)
1 Disassembly
2 Assembly
F High-Range Clutch Hub Assembly (Rebuild) TT only
1 Disassembly ~
/ 2 Assembly
G Torque Specifications – (TT only)
H High-Range Clutch Plate & Shaft Assembly (Rebuild) TT only
1 Disassembly
2 Assembly
L High-Range Clutch Drive Member Assembly (Rebuild) (TT only)
1 Disassembly
2 Assembly
J C
Clutch Piston Assemblies (Rebuild) TT & TRT
1 Disassembly
2 Assembly
K
0
Low-Range Planetary Carrier Assembly (Rebuild) TT only
1 Disassembly
2 Assembly
L Reverse & Low-Range Clutch Anchor (Rebuild) TT & TRT
1 Disassembly
2 Assembly
M Reverse-Range Planetary Carrier Assembly (Rebuild) TT & TRT
1 Disassembly
2 Assembly
N Transmission Housing (Rebuild) TT
1 Disassembly
2 Assembly
X Assembly of Transmission From Subassemblies
A General
1 One-Piece Shaft Without Disconnect (TT only)
2 Installation of Clutches, Planetaries
a Reverse-Low Range Clutches & Planetaries (TT only)
3 High-Range Clutch, Transfer Drive Gear (TT)
4 Installation of Turbine Gears, Freewheel Clutch (TT) Converter
Housing
a Turbine Gears, Freewheel Clutch
5 Torque Converter Housing (TT & TRT)
6 Installation of Converter Components, Input Drive (TT & TRT)
a Converter Components
b Input Drive Components (Direct Mount TT & TRT)
7 Installation of Exterfor Components (TT & TRT) ·
a Yokes, Parking Brake
b Oil strainer
c Control Valve Assembly
XL Wear Limits and Spring Data (TT only)
A Wear Limits – General
B Wear Limits Chart
C Spring Data
XII Transmission Control Valve (TT & TRT)
A Disassembly
B Assembly
XIII TRT Transmission Operation Description
A Forward, Reverse Gearing and Clutches
B High and Low-Range Gearing and Clutches
C Hydraulic System
1 Main-Pressure Regulator Valve
2 Converter-out, Cooler, Lubrication
3 Clutch Cutoff Valve
4 Manual Selector Valve
5 Trimmer Circuit
D Torque Paths Through Transmission
1 Functions
2 Cutaway Illustrations
3 Torque Paths
a Neutral and Power-takeoff
b Forward-1
c Forward-2
d Reverse-1
e Reverse-2
E Data Specifications – Model TRT 4420-1
F TRT Torque Specifications
XIV Disassembly TRT

84
A Rear Cover 85
B Low-Range Clutch and Transfer Drive Gear 85
C High-Range Clutch 86
D Removal of Forward, High-Range and Reverse Planetaries, Piston
Housing and Associated Parts , 87
1 Forward and High-Range Planetaries 87
2 Forward and High-Range Piston Housing and Pistons 87
3 Forward Clutch Plates, Ring Gear and High-Range Planetary 87
4 Forward Planetary, Reverse Ring Gear and Sun Gear 88
5 Forward and Reverse Clutch Plates, Clutch Anchor and Reverse
Planetary 88
6 Two-Piece Shaft with Disconnect (TRT only) 89
7 Low-Range Clutch Hub 90
a Disassembly 90
b Assembly 91
8 High-Range Clutch Anchor Assembly 91
a Disassembly 91
b Assembly 91
9 High-Range Planetary Carrier Assembly 91
a Disassembly 91
b Assembly 91
10 Forward Planetary Carrier Assembly 91
a Disassembly 91
b Assembly 93
11 Reverse Planetary Carrier Assembly 93
a Disassembly 93
b Assembly 93
XV Assembly of Transmission From Subassemblies
1 Installation of Reverse, Forward and High-Range Planetaries, Pistons,
and Clutches 95
a Reverse Piston, Clutch and Planetary · 95
b Installation of Forward and High-Range Planetaries · 95
c Forward Clutch, Forward and High-Range Piston Housing and High-
Range Clutch 96
2 Installation of Low-Range Clutch, Transfer Drive Gear and Rear Cover 100
a Low-Range Clutch 100
3 Rear Cover 102
XVI TRT – Wear Limits and Spring Data
A Wear Limits
B Spring Data
XVII Decimal and Metric Equivalents of Fractions of an Inch
103
104
February 196’7 SERVICE

S.M 25/3/2025