ENCLOSURE AS 1364793 - Caterpillar

Required Tools
Illustration 1 g02571852
Tooling (A) 198-4240 Digital Pressure Indicator Gp
Table 3
Tool Item Qty Part Number Description
A 198-4240 Digital Pressure Indicator Gp
A1 1 198-4234 Indicator
A2 2 198-4239 Pressure Sensor 41,368 kPa (6,000 psi)
A3 1 198-4236 Extension Cable Machine Preparation
Position the machine on level ground and stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release".
Illustration 2 g02143242
Pump compartment
(1) Pressure tap (delivery pressure for drive pump)
(2) Pressure tap (delivery pressure for idler pump)
(3) Pressure tap (power shift pressure)
Attach a 41,368 kPa (6,000 psi) pressure sensor to pressure tap (1) and (2).
Illustration 3 g02143866
Pilot manifold
(4) Solenoid valve for swing parking brake
(5) Connector
Disconnect connector (5) from the solenoid valve for swing parking brake (4).Test Procedure
Start the engine.
Place the machine controls at the following settings:
Engine speed dial "10"
AEC switch OFFRefer 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).
Place the hydraulic activation control lever in the UNLOCKED position.
Move the swing control lever slowly and ensure that the swing parking brake is activated properly.
Illustration 4 g02144062
Swing motors (top view)
(6) Right swing motor
(7) Left swing motor
(8) Relief valve (right swing)
(9) Locknut
(10) Adjustment plug
(11) Adjustment plug
(12) Locknut
(13) Relief valve (left swing)
(14) Relief valve (left swing)
(15) Locknut
(16) Adjustment plug
(17) Adjustment plug
(18) Locknut
(19) Relief valve (right swing)Right Swing Motor
Note: A temporary setting of the relief valve pressures for the left swing motor is required to see the relief valve pressures of the right swing motor.
Loosen locknut (15) on the left swing motor. Turn adjustment plug (16) by 90 degrees clockwise.
Tighten locknut (15) to a torque of 118 10 N m (87 7 lb ft).
Loosen locknut (18) on the left swing motor. Turn adjustment plug (17) by 90 degrees clockwise.
Tighten locknut (18) to a torque of 118 10 N m (87 7 lb ft).
Slowly move the swing control lever for a full SWING RIGHT operation and check the pressure for relief valve (8) at pressure tap (2).
Return the swing control lever to the NEUTRAL position.
To adjust the swing relief valve, loosen locknut (9) on the right swing motor. Turn adjustment plug (10) until the pressure gauge reading at pressure tap (2) is within the specification.
Tighten locknut (9) to a torque of 118 10 N m (87 7 lb ft).
Slowly move the swing control lever for a full SWING LEFT operation and check the pressure for relief valve (13) at pressure tap (2).
Return the swing control lever to the NEUTRAL position.
Loosen locknut (12) on the right swing motor. Turn adjustment plug (11) until pressure gauge reading at pressure tap (2) is within the specification.
Tighten locknut (12) to a torque of 118 10 N m (87 7 lb ft).Note: Turning adjustment plugs (10) and (11) clockwise increases the pressure. Turning adjustment plugs (10) and (11) counterclockwise decreases the pressure.Note: Always make final pressure adjustment on the pressure rise.Left Swing Motor
Note: After the adjustment of the right swing