Transmission Oil Pump
Show/hide table
Illustration 1 | g00274490 |
The pump is a one-section gear type pump.
Rotation is counterclockwise when the rotation is viewed from the drive end. For bench testing, use SAE 10W oil that is at 49°C (120°F).
Rotate the pump by hand. The pump must rotate freely.
Pump Output
- Minimum output ... 90.5 L/min (24 US gpm)
- Pump speed ... 1800 rpm
- Pressure ... 2750 kPa (400 psi)
- Pump speed ... 1800 rpm
(1) Clearance between the gears and the cover ... 0.089 ± 0.028 mm (.0035 ± .0011 inch)
(2) Bearings and Shafts
- Bore of the bearings ... 41.283 ± 0.008 mm (1.6253 ± .0003 inch)
- Diameter of shafts ... 41.232 ± 0.005 mm (1.6233 ± .0002 inch)
Show/hide table
Illustration 2 | g00274491 |
Body (3) |
Show/hide table
Illustration 3 | g00274492 |
Cover (4) |
Note: Install the bearings into the bores so that the bearings are 1.5 ± 0.5 mm (.06 ± .02 inch) below the surface. Install the bearings so that the bearing joints are 30 ± 15° from the centerlines of the shafts, as shown.
Caterpillar Information System:
Cold Weather Recommendations for All Caterpillar Machines Tire Inflation Information
Cold Weather Recommendations for All Caterpillar Machines Battery Information
793B Off-Highway Truck Air System and Brakes Pressure Switch (Brake Air)
793B Off-Highway Truck Air System and Brakes Temperature Switch (Brake Oil)
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Temperature Sender (Torque Converter Oil)
793B Off-Highway Truck Air System and Brakes Temperature Sender (Brake Oil)
561M Pipelayer Engine Starting
793B Off-Highway Truck Air System and Brakes Pressure Switch (Service Brake and Retarder)
793B Off-Highway Truck Air System and Brakes Traction Control Valve
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Hydraulic Tank and Filter
3408B and 3408C Industrial and Marine Engines Engine Oil Pump
793B Off-Highway Truck Air System and Brakes Control Valve (Hoist)
824G , 825G and 826G Landfill Compactor Differential and Final Drive Oil Sample - Obtain
793B Off-Highway Truck Air System and Brakes Pressure Sensor (Brake Air)
793B Off-Highway Truck Air System and Brakes Pressure Switch (Rear Brake Oil Cooling Filter)
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Service Brake Control
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Oil Filter (Power Train)
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Transmission Control Valve
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Dump Valve (Transmission)
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Speed Sensor (Transmission Output)
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Selector and Pressure Control Valve (Transmission)
793B Off-Highway Truck Steering System Temperature Switch (Steering Oil)
793B Off-Highway Truck Steering System Auxiliary Drive
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Solenoid Valve (Transmission Clutch)