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Greensmaster 3320/3420Hydraulic System Page 5 -- 58
Piston Pump Installation (Fig. 39)
1. Make sure the flange surfaces of the gear pump and
piston pump are thoroughly clean.
2. Install gear pump to the piston pump (see Gear
Pump Ins tallation in this section).
3. If removed, secure pump coupling to piston pump
shaft (Fig. 40 or 41):
A. Make sure that pump shaft and bore of coupling
are thoroughly cleaned.
B. Position key to pump shaft.
C. Apply Loctite #242 (or equivalent) to the threads
ofthecapscrewusedtosecurecouplingtopump
shaft.
D. Slide 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. Inspect threads and sealing surfaces of hydraulic fit-
tings and hydraulic hose connectors.Replace any dam-
aged or worn fittings or connectors.
5. Lubricate and place new O--rings onto all removed
hydraulic fittings. Install fittings into pump openings
making sure that fitting orientation is as noted during re-
moval. Tighten fittings (see Hydraulic Fitting Installation
in the General Information section of this chapter).
6. Insert coupling on pump shaft into coupling attached
to engine and slide pump assembly to pump mount. Se-
cure pump assembly to pump mount with two (2) cap
screws (item 23) and flat washers (item 24).
7. Remove plugs that were placed during disassembly
from hydraulic fittings and hoses.
8. Using labels placed during pump removal, lubricate
new O--rings and connect hydraulic hoses tog ear pump
and piston pumpf ittings. Tightenhose connections(see
Hydraulic Hose and Tube Installation in the General In-
formation section of this chapter).
9. Connectthe traction control cable tothe neutral arm:
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
jam nuts. Make sure that a lock washer is positioned
on each side of the neutral arm.
10.Remove clamp from gear pump suction hose (item
9).
11.Check oil level in hydraulic reservoir and add correct
oil if necessary.
12.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
13.Check neutralposition ofthe tractionpedal. If adjust-
ment is required, see Adjust Transmission for Neutral in
the Traction Unit Owners Manual.