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Compact Loader
153
Thomas 153 Repair Manual
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2-7
2
TROUBLE SHOOTING 2.4
Symptom: Operates In One Direction Only
Symptom: System Response Sluggish
Inspect external
control linkage
Check charge
pressure
Inspect
motor
Inspect charge
relief valve
Inspect inlet
screen or filter
Replace pump
and motor
Inspect charge
pump
Repair or
replace
Repair or
replace
Repair or
replace
Replace
Repair or
replace
Repair or
replace
Defective
Defective
Defective
Defective
Defective
Low
Inspect system
relief valves
OK
OK
OK
OK
OK
OK
Clogged
67
69
Table of Contents
Safety Precautions
4
Personal Considerations
4
Machine Guards
4
Equipment Considerations
4
Hand Tools
5
Housekeeping
5
General Considerations
5
Solvents
5
Operational Considerations
6
Service Techniques
7
Service Safety
7
Pressure Testing
7
Hoses and Tubes
7
Quick - Tach
8
Bearings
8
Boom Supports
8
Table of Contents
9
Cylinder Head
10
Hydraulic Circuit
11
Hydraulic Layout
12
Auxiliary Circuit
12
Hydraulic Schematic
13
Hydraulic Specifications
14
General Information
15
Boom Support
16
Gear Pump 1.2
16
Marking the Parts
17
Lubrication of Moving Parts
17
Care of Surface Treatment
17
Cleanliness
17
Start up Procedure
30
Testing and Adjusting the Relief Valve Pressure
31
Control Valve 1.3
31
Control Valve Disassembly
34
Diagram Legend
34
Hydraulic Cylinders
46
General Information
46
Testing the Piston Seals
47
Lift Cylinder Replacement
48
Tilt Cylinder Replacement
49
For Tilt Cylinder Removal
49
Cylinder Disassembly
50
Cylinder Inspection
52
Cylinder Assembly
52
Hydraulic Oil Filter
54
Filter Replacement
54
Rear Door
54
Hydraulic Oil Cooler
55
Cooler Replacement
55
Adding Oil
56
Checking the Oil Level
56
Oil Reservoir
56
Servicing the Oil Reservoir
57
Trouble Shooting 1.8
58
Torque Chart 1.9
59
Conversion Factors
60
U.S. to Metric
60
Conversion Chart 1.10
60
Tandem Pump Parts Diagram
62
Hydrostatic Drive System
62
Hydrostatic Circuit and System Pressure Schematic
63
Hydrostatic Tandem Pump 137/153
64
Hydraulic Drive Motor
64
Reservoir
64
Specifications 2.2
64
General Information 2.3
66
Symptom: Neutral Difficult or Impossible to Find
67
Symptom: System Operating Hot
67
Trouble Shooting 2.4
67
Symptom: Operates in One Direction Only
68
Symptom: System Response Sluggish
68
System will Not Operate in Either Direction
69
System Diagnosing Steps and Special Tools
70
RH Side and Bottom View
71
Gauge Information
71
Pressure Tests 2.5
71
Towing Procedure
72
Contamination Types
73
Flushing the Hydraulic System 2.7
73
Cleaning the System
74
Start-Up Procedure 2.8
76
Throttle
76
Gear Pump Replacement
77
Tandem Pump Replacement
78
Tandem Case Drain Hose
78
Restraint Bar
81
Sauer Danfoss Series 40 / M35 Rear Pump
82
Tandem Pump Parts Diagram
82
Rear Pump Diagram C1881 Index
83
Sauer Danfoss Series 40 / M35 Front Pump
84
Front Pump Diagram C2007 Index
85
Pump Diagram C2875 Index
87
Drive Motor
88
Parts Illustration
96
Hydraulic Fittings
114
Tandem Pump
114
Torque Specifications
114
Final Drive
115
Trouble Shooting
115
Maintenance
116
Specifications
116
Adding Oil
117
Changing the Oil
117
Checking the Oil
117
Lubrication 3.2
117
Checking the Drive Chain
118
Drive Chain 3.3
118
Adjusting the Drive Chain
119
Adjusting
120
Chain Removal
120
Chain Installation
121
Chain Tightener Removal
122
Inspection
122
Chain Tightener Installation
123
Drive Motor Sprocket 3.5
124
Replacement
124
Axle Assembly 3.6
125
Axle Removal
126
Inspection
127
Axle Installation
128
Axle Stud Replacement
131
Trouble Shooting 3.7
132
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Thomas 153 Specifications
General
Brand
Thomas
Model
153
Category
Compact Loader
Language
English
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