2. Take care to assure the surfaces are clean and free of any foreign material or paint prior to installingthe auxiliary pad.C CautionDo not allow the force of the cylinder block spring and swashplate leveler springs to separate the endcap from the pump housing. Gasket damage and external leakage may result.Auxiliary pad components (typical)J70J60J50J80E101 084EEndcap screwScrew torqueSee appropriate table for wrench size and torqueReassembly1. 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 thehousing. Torque per the accompanying table.Torque endcap screws in a criss-cross patternEnd cap screw torqueFrame size Torque030 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 pumpThe following procedure shows how to remove and install a charge pump.Removal1. For pumps with an auxiliary mounting pad, refer to the Auxiliary Pad instructions.C CautionOn earlier production frame size 75 pumps with twin ports, secure the endcap to the pump housingwith a clamp to avoid gasket damage.2. Remove the six screws (H80) holding the charge pump cover retainer (H70).Service Manual Series 90 PumpsMinor repair52 520L0818 • Rev 0101 • August 2015
