Toro Greensmaster TriFlex 3300 Service Manual page 113

7. Mark hydraulic fitting orientation to allow correct as-
sembly. Remove hydraulic fittings and O--rings from
gear pump. Discard removed O--rings.
NOTE: A case drain exists in the piston (traction) pump
and a suction port is near the input shaft of the gear
pump (Fig. 39). When the gear pump is removed from
the piston pump, plug piston pump case drain hole to
prevent draining the piston pump.
8. Support gear pump to prevent it from falling. Sepa-
rate gear pump from the piston pump by removing two
(2) socket head screws and flat washers.
9. Remove O--ring from between the gear pump and
piston pump. Discard O--ring.
10.Inspect threads and sealing surfaces of fittings and
gear pump ports. Replace components if damage is
found.
Installation (Fig. 38)
1. Make sure mounting and O--ring sealing surfaces on
the gear pump and piston pump are clean.
2. Apply clean hydraulic oil to gear pump flange O--ring
(item 7). Place O--ring on the gear pump.
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.
IMPORTANT: Position gear pump to the piston
(traction) pump so that the gear pump inlet (suction)
port is facing up.
3. Position gear pump to the piston (traction) pump so
that the pump inlet is facing up.
4. Secure gear pump to the piston pump with two (2)
socket head screws and flat washers. Torque screws
from 27 to 31 ft- -lb (37 to 42 N- -m).
Greensmaster 3300/3400
5. Lubricate and place new O--rings onto gear pump
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. Remove plugs that were placed during disassembly
from hydraulic hoses.
7. Using labels placed during gear pump removal, lubri-
cate new O--rings and connect hydraulic hoses to lower
gear pump fittings. Tighten hose connections (see Hy-
draulic Hose and Tube Installation in the General Infor-
mation section of this chapter).
8. Install suction hose to the gear pump inlet fitting and
secure with hose clamp.
9. Remove clamp from pump suction (inlet) hose to al-
low hydraulic oil flow to the gear pump.
10.Check oil level in hydraulic reservoir and add correct
oil if necessary.
11. Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
1
1. Piston pump case drain
Page 5 - - 61
Remove plugs
before installing
2
gear pump to
piston pump
Figure 39
2. Gear pump suction port
Hydraulic System