DRIVE GP-DIFFERENTIAL STEERING 1660666 - Caterpillar

Table 1
Effectivity and Adaptability of the New Relief Valve Group    
Model    Effectivity    Adaptability    
324D     S/N:EJC934-UP     S/N:EJC1-933    
S/N:SYM801-UP S/N:SYM1-800    
325D     S/N:GPB1083-UP     S/N:GPB1-1082    
S/N:PKE1172-UP S/N:PKE1-1171    
329D     S/N:XDB1-UP        
S/N:EBM1-UP    
S/N:SCY288-UP S/N:SCY1-287    
Illustration 1 g02079755
Procedure
Place the machine on flat, level ground.
Fully retract the stick cylinder rod and the variable adjustable boom cylinder rod. Adjust the position of the bucket so that the bucket is parallel to the ground. Lower the stub boom until the bucket is flat on the ground.
Stop the engine.
Release the pressure in the stub boom, the fore boom and the stick hydraulic circuits. Refer to Testing and Adjusting Manual, RENR9905, "Hydraulic system Pressure - Release" for the 324D, RENR7235for the 325D and 329D.
Remove the 255-5662 Relief Valve Gp that is marked with "38" from the 308-6964 Load Control Valve Gp. Replace the 255-5662 Relief Valve Gp with a 352-6816 Relief Valve Gp that is marked with "VDMN" or "38MN".
Tighten the 352-6816 Relief Valve Gp to a torque of 95 14 N m (70 10 lb ft).
Start the engine.
Slowly move the joystick in order to raise the stub boom and lift the bucket 1 m (3.28 ft) off the ground. Lower the bucket down to the ground with the use of the fore boom hydraulic circuit. Raise and lower the fore boom in this way for 10 cycles in order to purge the air.
Illustration 2 g02079894