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Greensmaster 3320/3420 Hydraulic SystemPage 5 -- 51
7. Mark hydraulic fitting orientation on bottom of pump
toallow correctassembly.Remove hydraulicfittingsand
O--rings from gear pump. Discard removed O--rings.
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 ( item 7) 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. 34)
1. Make sure mountingand O--ring sealing surfaces on
the gear pump and p iston pump are clean.
2. Apply clean hydraulic oil to gear pump flange O --ring
(item 7). Place O--ring on the gear pump.
3. Apply antiseize lubricant to gear pump shaft splines.
IMPORTANT: Position gear pump to the piston
(traction)pump so thatt he gearpumpinlet(suction)
port is facing up.
4. Position gear pump to the piston (traction) pump so
that the pump inlet is facing up.
5. 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).
6. 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).
7. Remove all plugs that were placed during disassem-
bly from hydraulic hoses.
8. Lubricate new O--ring and connect hydraulic hose to
lower gear pump fitting. Tighten hose connections (see
Hydraulic Hose and Tube Installation in the General In -
formation section of this chapter).
9. Install suction hose to the gear pump inlet fitting and
secure with hose clamp.
10.Remove clamp from pump suction (inlet) hose to al-
low hydraulic oil flow to the gear pump.
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).
Hydraulic
System