2. Take care to assure the surfaces are clean and free of any foreign material or paint prior to installing
the auxiliary pad.
Caution
Do not allow the force of the cylinder block spring and swashplate leveler springs to separate the end
cap from the pump housing. Gasket damage and external leakage may result.
Auxiliary pad components (typical)
J70
J60
J50
J80
E101 084E
Endcap screw
Screw torque
See appropriate table for wrench size and torque
Reassembly
1. Lubricate and install O-ring (J50) on end cap pilot.
2. Install the auxiliary mounting pad (J60) on rear of endcap.
3. Install four large screws (J80) and new washers (J70) through the mounting pad and end cap into the
housing. Torque per the accompanying table.
Torque endcap screws in a criss-cross pattern
End cap screw torque
Frame size Torque
030 58 N•m [43 lbf•ft]
042 75 N•m [55 lbf•ft]
055 122 N•m [90 lbf•ft]
075 – 130 298 N•m [220 lbf•ft]
180 – 250 580 N•m [429 lbf•ft]
Charge pump
The following procedure shows how to remove and install a charge pump.
Removal
1. For pumps with an auxiliary mounting pad, refer to the Auxiliary Pad instructions.
Caution
On earlier production frame size 75 pumps with twin ports, secure the endcap to the pump housing
with a clamp to avoid gasket damage.
2. Remove the six screws (H80) holding the charge pump cover retainer (H70).
Service Manual
Series 90 Pumps
Minor repair
52 520L0818 • Rev 0101 • August 2015
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