4-2 Z Master Z400 Service Manual
4
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. During installation, lightly
lubricate all seals, O-rings and gaskets with
clean petroleum jelly prior to installation.
This procedure shows the LH Hydrostatic
Pump being removed. Use these same
procedures to remove the RH Hydrostatic
Pump.
1. Disconnect the negative battery cable from the
battery.
2. Using compressed air, clean the area around the
hydrostatic pump to make sure it is free from any dirt
and debris.
3. Remove the bolt, washer and nut located between
the ball joint and the control arm that retains the
tracking link rod to the hydro control arm (Fig. 149).
Fig 149 PICT-0082a
4. Drain the hydraulic oil from the hydraulic reservoir
tank.
5. Remove the hose clamp from the case drain
hydraulic hose, located on the top inside of the
hydrostatic pump (Fig. 150).
Note: Cap the hose and the tting to prevent entry
of dirt and debris.
Fig 150 PICT-0083a
6. Remove the pump suction hydraulic line, located on
the front of the hydrostatic pump (Fig. 151).
Fig 151 PICT-0084a
To Next Page
Loading...