Service Manual

4-2 Z Master Z597 Diesel Service Manual

HYDRAULIC SYSTEM

Hydrostatic Pump Removal

Note: Cleanliness is a key factor in a successful

repair of any hydrostatic system. Thoroughly

clean all exposed surfaces prior to any type

of maintenance. Cleaning all parts by using

a solvent wash and air drying is usually

adequate. As with any precision equipment,

all parts must be kept free of foreign material

and chemicals. Protect all exposed sealing

areas and open cavities from damage and

foreign material.

Upon removal, all seals, O-rings, and gaskets

should be replaced. Lightly lubricate all

seals, O-Rings and gaskets with clean

petroleum jelly prior to installation.

This procedure is showing the LH Hydrostatic Pump

being removed. Use these same procedures to remove

the RH Hydrostatic Pump.

1. Disconnect the negative and positive battery cables.

Remove the battery from the unit.

2. Using compressed air, clean the area around the

hydrostatic pump. Perform additional cleaning as

needed to make sure it is free from any dirt and

debris.

3. Remove the two knobs located on the engine access

panel assembly. Remove both engine belt shield

and the engine access panel (Fig. 121).

Fig 121 DSC-2071

4. Using a 3/8” drive ratchet, insert the drive end into

the square hole in the pump belt tensioner arm.

Relieve the tension on the hydrostatic pump v-belt

and remove the belt (Fig. 122).

Fig 122 DSC-2073

5 Remove the bolt and nut retaining the hydro pump

control linkage to the hydro control arm (Fig. 123).

Fig 123 DSC-2081