An accessory drive has been provided at the rear of the
Remove the drive coupling.
engine to accommodate the gear driven hydraulic pump.
The drive for the pump is made up of an accessory
Place a clean, lintless cloth in the flywheel
drive plate and drive coupling. The accessory drive
housing opening, underneath the accessory drive plate,
plate is bolted to the balance shaft gear. The hydraulic
to prevent bolts from accidentally falling into the gear
pump is bolted to the flywheel housing and driven by the
Then remove the four bolts attaching the
drive coupling which is splined to the accessory drive
accessory drive plate and remove the plate.
Remove Accessory Drive
Clean the accessory drive parts with clean fuel oil and
Remove the hydraulic pump accessory drive as follows:
dry them with compressed air. Examine the gear teeth
of the drive shaft, drive coupling or drive plate for wear.
Remove any external piping or connections to the
If worn excessively, replace with new parts.
Install Accessory Drive
Remove the five bolts and lock washers attaching
the pump to the flywheel housing. Pull the pump
Remove the old gasket material from the flywheel
straight out from the flywheel housing.
housing. Use care so that no gasket material falls into
the gear train compartment.
Fig. 1. Typical Components of Accessory Drive For Direct-Driven Accessories