Greensmaster 3300/3400Hydraulic System Page 5 -- 68
Piston Pump Installation (Fig. 44)
1. Make suretheflangesurfacesof thegearpump and
piston pump are thoroughly clean.
IMPORTANT: Acasedrain exists inthepiston (trac-
tion) pump a nd asuctionport isnear theinputshaft
of the gear pump (Fig. 47). Before the gear pump is
installed to the piston pump, make sure that plugs
placed in either of these ports are removed. Failure
to remove plugs will cause excessive pressure in
the piston pump and damage seals.
2. Install gear pump to the piston pump ( see Gear
Pump Installation in this section).
3. If removed, secure pump hub (Greensmaster 3300
machinesshowninFigure45)orcoupling(Greensmas-
ter 3400 machines shown in Figure 46) to piston pump
shaft:
A. Make sure that pump shaft and bore of hub/cou-
pling are thoroughly cleaned.
B. Position key to pump shaft.
C. Apply Loctite #242 (or equivalent) to the threads
of the cap screw used to secure hub/coupling to
pump shaft.
D. Slide hub/coupling onto pump shaft and secure
with spacer and cap screw. Torque cap screw from
27 to 33 ft--lb (37 to 44 N--m).
4. OnGreensmaster3300machines,securepumphub
to rubber coupling with two (2) cap screws, coupling
spacers and flange nuts (Fig. 45).
5. Inspectthreadsand sealingsurfacesofhydraulicfit-
tingsandhydraulichoseconnectors.Replaceanydam-
aged or worn fittings or connectors.
6. Lubricate and place new O--rings onto all removed
hydraulic fittings. Install fittings into pump openings
makingsure thatfittingorientationis asnotedduringre-
moval.Tightenfittings (seeHydraulicFittingInstallation
in the General Information section of this chapter).
7. Position pumpassembly topumpmountandsecure
withtwo (2)cap screws(item 23)andflat washers(item
24).
8. Remove plugs thatwere placed duringdisassembly
from hydraulic fittings and hoses.
9. Using labels placed during pump removal, lubricate
newO--ringsandconnecthydraulichosestogearpump
andpistonpumpfittings.Tightenhoseconnections(see
Hydraulic Hose and Tube Installation in the General In-
formation section of this chapter).
10.Connectthetractioncontrolcabletotheneutralarm:
A. Secure cable ball joint to neutral arm with cap
screw (item 21) and flange nut (item 22).
B. Secure control cable to neutral arm with cable
jamnuts. Makesurethata lockwasher ispositioned
on each side of the neutral arm.
11.Remove clamp from gear pump suction hose (item
9).
12.Checkoil levelinhydraulic reservoirandaddcorrect
oil if necessary.
13.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
14.Checkneutralpositionofthetractionpedal.Ifadjust-
mentisrequired,see AdjustTransmissionfor Neutralin
the Traction Unit Owners Manual.
1. Piston pump case drain 2. Gear pump suction port
Figure 47
2
1
Remove plugs
before installing
gear pump to
piston pump
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