MUFFLER AS 3817156 - Caterpillar

Illustration 1 g02697239
Table 2
Torque Specification    
Item     Part     Torque    
(6)     Relief Valve (right swing)    
177 18 N m (131 13 lb ft)    
(7)     Locknut    
80 8 N m (60 6 lb ft)    
(9)     Relief Valve (left swing)    
177 18 N m (131 13 lb ft)    
(10)     Locknut    
80 8 N m (60 6 lb ft)    Introduction
Two relief valves are located in the head of the swing motor. These relief valves limit the pressure in the left and right swing circuits to the swing relief valve settings. The following procedure will determine if the swing relief valves are out of adjustment.Required Tools
Illustration 2 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 1     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 3 g02559336
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 (2) .
Illustration 4 g02569317
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.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
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.
Place the hydraulic activation control lever in the UNLOCKED position.
Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
Illustration 5 g02569637
Swing motor (6) Relief valve (right swing) (7) Locknut (8) Adjustment plug (9) Relief valve (left swing) (10) Locknut (11) Adjustment plug
Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (9) at pressure tap (2) . The swing relief pressure should be 24550 1000 kPa (3561 145 psi).
Return the joystick to the NEUTRAL position.
Slowly move the swing joystick for a full SWING LEFT operation and check the pressure for relief valve (6) at pressure tap (2) . The swing relief pressure should be 24550 1000 kPa (3561 145 psi).
Return the joystick to the NEUTRAL position.Adjustment Procedure
In order to adjust the swing relief valve, loosen the locknut and turn the adjustment plug until the pressure reading at pressure tap (2) is within the specification.Note: Turning the adjustment plug clockwise increases the pressure. Turning the adjustment plug counterclockwise decreases the pressure.Note: Always make final pressure adjustments on pressure rise.
Tighten the locknut to