0005584 COVER Caterpillar parts COVER
Alternative (cross code) number:
Weight: 0.30 pounds 0 kg.
Part Number    Description    Quantity
1U-5796     Pressure Differential Gauge (Group)     1
Tools Needed from the 1U-5796 Pressure Differential Tool Gp
Tooling    Item    Part Number    Description    Qty
A     A1     177-7861     Hose As     1
A2 6V-4143     Quick Connect Coupler     4
A3 6V-3965     Fitting As     3
A4 6V-4144     Quick Connect Coupler     1
A5 8T-0861     Pressure Gauge
60000 kPa (8600 psi)     1
A6 8C-8431     Tee     1
A7 1U-5793     Pressure Differential Gauge Group     1
A8 6V-0484     O-Ring Adapter     1
A9 177-7861     Hose As     1    Test Procedure
Move the machine to a clear area that is level. Lower the implements to the ground. Stop the engine.
Assemble Tooling (A). Refer to Illustration 1 for the orientation of the parts. Refer to Table 2 for the required parts information.
Illustration 2 g00866485
Implement hydraulic pump (1) Pressure tap for the signal oil (2) Tap for the pump discharge pressure
Remove the floorplates. Attach hose (A1) to pressure tap (2). Attach hose (A9) to pressure tap (1) .
Make sure that the steering linkage is correctly adjusted. Refer to the test for low pressure standby in Testing and Adjusting, "Pump Discharge Pressure - Test" in this module.
Install the floorplates.
Place the main display in the operator station in Service Mode of operation in order to monitor the engine rpm.
Start the engine. Operate the engine at high idle. Refer to the Engine Information Plate or refer to the Fuel Settings and Related Information Microfiche. Record the engine rpm.
When the engine is still at high idle, move the bulldozer control lever to a midway position between the HOLD and FULL RAISE positions. While the bulldozer blade is being raised, read the pressure differential. Record the reading. The reading on the gauge is called the margin pressure. This pressure differential is the difference between the pump discharge pressure and the signal pressure from the control valve. The margin pressure should be 2100 100 kPa (305 15 psi). If the margin pressure is not correct, refer to Testing and Adjusting, "Pump Control Valve (Steering) - Adjust" for adjustment of the margin pressure and the pressure and flow compensator valve. When the margin pressure is adjusted, the setting should be in the range of 2100 100 kPa (305 15 psi).
Lower the bulldozer blade to the ground. Move all implement control levers to the HOLD position.
Release the parking brakes. Fully activate the service brakes. Position the tiller handle with the speed control in the NEUTRAL position and the direction control in the NEUTRAL position.
Keep the engine running at high idle. Move the tiller handle to the MID STEER RIGHT POSITION. The hydraulic system is now in a steer stall condition.Note: The machine must not move. If the machine moves, the brake