Thomas 85 - SEAT AND SEAT BELT; SEAT BAR

9
Section 1 Hydraulic System
Hydraulic Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.1
Gear Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.2
Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3
Hydraulic Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4
Hydraulic Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5
Hydraulic Oil Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.7
Torque Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.8
Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.9
Section 2 Hydrostatic Drive System
Hydrostatic Drive Circuit ..................................................................2.1
Specifications.....................................................................................2.2
General Information...........................................................................2.3
Trouble Shooting ...............................................................................2.4
Pressure Tests.....................................................................................2.5
Towing Procedure ..............................................................................2.6
Flushing The Hydraulic System ........................................................2.7
Start - up Procedure ...........................................................................2.8
Gear Pump Replacement ...................................................................2.9
Tandem Pump Replacement ..............................................................2.10
Tandem Pump Parts Diagram ............................................................2.11
Drive Motor .......................................................................................2.12
Torque Specs......................................................................................2.13
Section 3 Final Drive
Specifications and Maintenance ........................................................3.1
Lubrication.........................................................................................3.2
Drive Chain........................................................................................3.3
Drive Motor Sprocket ........................................................................3.4
Axle Assembly...................................................................................3.5
Parking Brake ....................................................................................3.6
Trouble Shooting ...............................................................................3.7
Section 4 Controls
Steering ..............................................................................................4.1
Foot Pedals.........................................................................................4.2
Hand Controls ....................................................................................4.3
Throttle...............................................................................................4.4
Restraint Bar ......................................................................................4.5
Parking Brake ....................................................................................4.6
Trouble Shooting ...............................................................................4.7
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