Greensmaster 3300/3400 Hydraulic SystemPage 5 -- 67
Piston Pump Removal (Fig. 44)
1. Parkmachineonalevelsurface,engagetheparking
brake, lower the cutting units and stop the engine. Re-
move key from the ignition switch.
CAUTION
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components in
this section.
2. Disconnect the traction control c able ball joint (item
20) from the pump lever. Loosen traction control cable
jam nuts that secure traction control cable to the cable
support. Position cable away from the pump assembly.
3. On machines with gasoline engine, remove two (2)
cap screws, coupling spacers and flange nuts that se-
cure pump hub to rubber coupling (Fig. 45).
4. Thoroughlycleanhydraulichoseendsandfittingson
gear and piston (traction) pumps to prevent hydraulic
system contamination.
5. Label all hydraulic hose connections on gear and
piston pumps for assembly purposes.
6. Clamp pump suction hose (item 9) to prevent drain-
ing the hydraulic reservoir.
7. Loosen hose clamp and remove suction hose from
the gear pump.
8. Disconnect hydraulic hoses from fittings on pump
assembly.Allowhosestodrainintoas uitablecontainer.
Plug hoses and fittings to prevent contamination.
CAUTION
Support the gear and piston pump assembly
when removing its supporting fasteners to pre-
vent it from falling and causing damage or per-
sonal injury.
9. Support pump assembly to prevent it from falling.
10.Remove two (2)cap screws(item23) andflat wash-
ers (item 24) that secure pump assembly to pump
mount.Separate pumpassembly fromthe pumpmount
and remove pump from machine.
11.If necessary, remove pump hub (Greensmaster
3300machinesshowninFigure45)orcoupling(Green-
smaster 3400 shown in Figure 46). Locate and retrieve
key from pump shaft.
12.Separategearpumpfromthepistonpump(seeGear
Pump Removal in this section).
IMPORTANT: If fittings are going to be removed
from piston pump, note position of fittings for as-
sembly purposes.
13.If fitting removal from piston pump is necessary,
markhydraulicfittingorientationtoallowcorrectassem-
bly. Remove hydraulic fittings and O--rings from piston
pump. Discard removed O--rings.
1. Piston pump
2. Cap screw (2 used)
3. Flat washer (2 used)
4. Coupling spacer (2 used)
5. Pump mount
6. Cap screw
7. Spacer
8. Flange nut (2 used)
9. Cap screw (2 used)
10. Pump hub
11. Key
12. Rubber coupling
Figure 45
7
3
8
1
10
9
2
5
6
4
GREENSMASTER 3300
11
27 to 33 ft--lb
(37to44N--m)
12
Loctite #242
1. Piston pump
2. Cap screw (2 used)
3. Flat washer (2 used)
4. Coupling
5. Cap screw
6. Spacer
7. Engine coupling flange
8. Bell housing
9. Key
Figure 46
GREENSMASTER 3400
3
1
4
2
7
6
5
8
9
27 to 33 ft--lb
(37to44N--m)
Loctite #242
Hydraulic
System
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