Toro Greensmaster TriFlex 3300 Service Manual page 120

Piston Pump Installation (Fig. 44)
1. Make sure the flange surfaces of the gear pump and
piston pump are thoroughly clean.
IMPORTANT: A case drain exists in the piston (trac-
tion) pump and a suction port is near the input shaft
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
machines shown in Figure 45) or coupling (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. On Greensmaster 3300 machines, secure pump hub
to rubber coupling with two (2) cap screws, coupling
spacers and flange nuts (Fig. 45).
5. Inspect threads and sealing surfaces of hydraulic fit-
tings and hydraulic hose connectors. Replace any dam-
aged or worn fittings or connectors.
6. 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).
7. Position pump assembly to pump mount and secure
with two (2) cap screws (item 23) and flat washers (item
24).
8. Remove plugs that were placed during disassembly
from hydraulic fittings and hoses.
Hydraulic System
9. Using labels placed during pump removal, lubricate
new O--rings and connect hydraulic hoses to gear pump
and piston pump fittings. Tighten hose connections (see
Hydraulic Hose and Tube Installation in the General In-
formation section of this chapter).
10.Connect the traction control cable to the 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.
11. Remove clamp from gear pump suction hose (item
9).
12.Check oil level in hydraulic reservoir and add correct
oil if necessary.
13.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
14.Check neutral position of the traction pedal. If adjust-
ment is required, see Adjust Transmission for Neutral in
the Traction Unit Owners Manual.
1. Piston pump case drain
Page 5 - - 68
Remove plugs
before installing
2
gear pump to
piston pump
1
Figure 47
2. Gear pump suction port
Greensmaster 3300/3400