PLATE AS 3669870 - Caterpillar

Do not turn the steering wheel when the engine is running and a low pressure gauge has been installed in the steering circuit. If the steering wheel is turned, the pressure of the oil to the steering cylinders will be too high for a low pressure gauge.
Start the engine and operate the engine at low idle. Check the pressure readings on the two pressure gauges.
The difference between the pressure in the right cylinder and the pressure in the left cylinder cannot exceed 35 kPa (5 psi). If the pressure is out of tolerance, complete the following procedure.
Remove cover (3) from steering control valve (2) .
Add shims (5) if the pressure for a left turn is higher than the pressure for a right turn. Remove shims (5) if the pressure for a left turn is lower than the pressure for a right turn.
Install cover (3) to steering control valve (2) .
Purge the steering system.Steering System Pressure
Table 4
Tools Needed    
Qty     Part Number     Description    
1     4C-4892     Hydraulic Test Fitting Gp    
1     8T-0854     Pressure Gauge    
1     8T-0860     Pressure Gauge    
Move the machine to a level, hard surface. Shut off the engine and engage the parking brake.
Illustration 6 g00812332
(6) Test Port for the Steering Pump
Remove the dust cap from test port (6) of the steering pump. Attach 8T-0854 Pressure Gauge to the test port (6) .
Do not turn the steering wheel when the engine is running and a low pressure gauge has been installed in the steering circuit. If the steering wheel is turned, the pressure of the oil to the steering cylinders will be too high for a low pressure gauge.
Illustration 7 g00378123
(2) Steering control valve (3) Cover (4) Spacers (5) Shims
Start the engine and operate the engine at high idle. The pressure gauge should now read 740 75 kPa (107 11 psi). If the pressure reading is within tolerance, continue to Step 4. If the pressure reading is out of tolerance, stop the machine and shut off the engine. Complete the following procedure.
Remove cover (3) from steering control valve (2) .
Add spacers (4) in order to increase the pressure. Remove spacers (4) in order to decrease the pressure.
Install cover (3) to steering control valve (2) .
Purge the steering system.
Repeat Step 3.
Remove 8T-0854 Pressure Gauge and install 8T-0860 Pressure Gauge to test port (6) on the steering pump.
Illustration 8 g00814283
Bottom View of the Steering Control Valve
Remove the dust cap from test port (7) of the steering control valve. Attach 8T-0854 Pressure Gauge to test port (7) of the steering control valve.
Start the engine and operate the engine at high idle. Raise the bowl and release the brakes.
Turn the machine toward the left until the left turn stops hit. Continue steering to the left. Take the readings from both of the pressure gauges. Subtract the reading at the steering control valve from the reading at the steering pump. The difference should read 15688 518 kPa