PANEL 1903683 - Caterpillar

Install a 40000 kPa (5800 psi) pressure gauge between hose (1) and the rotate valve.
Install tee (5) on the rotate valve.
Connect O-Ring seal (4) and hose (1) to tee (5) .
Install O-Ring seal (7) on fitting (6). Install fitting (6) in tee (5) .
Connect hose (3) and pressure gauge (2) to fitting (6) .
Start the engine.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Put the hydraulic activation control lever in the UNLOCKED position. Depress the switch for clockwise rotation or counterclockwise rotation.
Check the relief valve pressure setting on the pressure gauge.
Release the switch.
Adjust the pressure setting to the manufacturer's specification for the attachment that is being used.
Illustration 3 g00998213
Rotate control valve (8) Relief valve (9) Adjustment screw (10) Locknut
Loosen locknut (10) .
Turn adjustment screw (9) clockwise in order to increase the pressure. Turn adjustment screw (9) counterclockwise in order to decrease the pressure.
Tighten locknut (10) .
Stop the engine and place the hydraulic activation control lever in the LOCKED position.
Reconnect the hoses to the rotator motor.Adjustment of the Flow Rate
Note: The working relief pressure of the rotate control valve must be set to the correct specification before the flow rate can be tested.
Illustration 4 g00989726
(11) Hose (12) Hose (13) 6V-8398 O-Ring Seal (14) 8T-7968 Connector (15) 3D-2824 O-Ring Seal (16) 4C-9436 Flow meter (17) 4C-9623 Transducer (18) 4C-9438 Cable (19) 4C-9910 Flow meter
Disconnect hoses (11) and (12) from the rotator motor.
Install O-ring seals (13) and (15) on connectors (14). Install connectors (8) in each end of flow meter (16) .
Connect hoses (11) and (12) to flow meter (16) .
Connect transducer (17) to flow meter (16). Connect cable (18) to transducer (17) and flow meter (19) .
Illustration 5 g00998226
Rotate control valve (20) Locknut (21) Adjustment screw (22) Locknut (23) Adjustment screwNote: Machine configurations can vary. Verify that the lines for clockwise rotation and counterclockwise rotation are identified prior to adjusting the valve.
Start the engine.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Put the hydraulic activation control lever in the UNLOCKED position. Depress the switch for clockwise rotation.
Record the flow rate.Note: The flow rate is adjusted by restricting the return oil flow. Refer to Systems Operation, "Grapple Hydraulic System".
In order to adjust the flow for clockwise rotation, loosen locknut (20). Turn adjustment screw (21) in order to adjust the flow rate. Adjust the flow to the manufacturer's specifications.Note: Turn the adjustment screw clockwise in order to reduce the flow. Turn the adjustment screw counterclockwise in order to increase the flow.
Repeat Steps 5 through 9 using the switch for counterclockwise rotation in order to test the flow rate.
In order to adjust the