Greensmaster 3300/3400 Hydraulic SystemPage 5 -- 61
7. Mark hydraulic fitting orientation to allow correct as-
sembly. Remove hydraulic fittings and O--rings from
gear pump. Discard removed O--rings.
NOTE: Acasedrainexistsin thepiston(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. MakesuremountingandO--ringsealingsurfaceson
the gear pump and piston pump are clean.
2. Applycleanhydraulic oiltogearpumpflange O--r ing
(item 7). Place O--ring on the gear pump.
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.
IMPORTANT: Position gear pump to the piston
(traction)pumpsothatthegearpumpinlet(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).
5. Lubricate and place new O--rings onto gear pump
hydraulic fittings. Install fittings into pump openings
makingsure thatfittingorientationis asnotedduringre-
moval.Tightenfittings (seeHydraulicFittingInstallation
in the General Information section of this chapter).
6. Remove plugs thatwere placed duringdisassembly
from hydraulic hoses.
7. Usinglabelsplacedduringgearpumpremoval,lubri-
catenew O--ringsand connecthydraulic hosestolower
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 hoseto the gearpump inlet fittingand
secure with hose clamp.
9. Remove clamp from pump suction (inlet) hose to al-
low hydraulic oil flow to the gear pump.
10.Checkoil levelinhydraulic reservoirandaddcorrect
oil if necessary.
11.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
1. Piston pump case drain 2. Gear pump suction port
Figure 39
2
1
Remove plugs
before installing
gear pump to
piston pump
Hydraulic
System
To Next Page
Loading...
