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Greensmaster 3150 Hydraulic SystemPage 4 -- 61
Piston Pump Removal (Fig. 42)
1. Park machine on a level surface, engage parking
brake, lower cutting units and stop engine. Remove key
from the ignition switch.
CAUTION
Before continuing further, read and become fa -
miliar with General Precautions for Removing
and Installing Hydraulic System Components.
2. Disconnect the traction control cable ball joint and
jam nuts from t he neutral arm (Fig. 43). Posit ion traction
cable away from the pump assembly.
CAUTION
The extension spring attached to the neutral arm
is under tension and may cause personal injury
during removal. Use caution when removing the
spring from the pump neutral arm.
3. Disconnect one end of the extension spring attached
to the neutral arm (Fig. 44).
4. Remove two (2) cap screws (item 10), flat washers
(item 9), coupling spacers (item 7) and lock nuts (item
6) that secure pump hub to rubber coupling (item 8).
5. Thoroughlyclean hydraulic hose ends andfittings on
gear and piston (traction) pumps to prevent hydraulic
system contamination.
6. Label all hydraulic hose connections on gear and
piston pumps for assembly purposes.
7. Clamp pump inlet hose (item 4) to prevent draining
the h ydraulic reservoir.
8. Loosen hose clamp and remove inlet hose from the
gear pump.
9. Disconnect hydraulic hoses from fittings on pump
assembly. Allow hoses to drain into a suitable container.
Plug hoses and fittings to prevent contamination.
CAUTION
Support the pump assembly when removing its
supporting fasteners to prevent it from falling
and causing personal injury.
10.Support pump assembly to prevent it from falling.
Figure 43
1. Piston pump
2. Traction cable
3. Jam nut (2 used)
4. Cable ball joint
2
1
4
3
1. Extension spring
2. Dampener hose
3. Spring bracket
4. Mount plate
5. Neutral arm
Figure 44
1
2
4
3
5
Figure 45
1. Piston pump case drain port
2. Gear pump suction port
2
1
Remove plugs
before installing
gear pump to
piston pump
Hydraulic
System