11.
mark fitting orientation to allow correct assembly.
If hydraulic fittings are to be removed from pump,
WARNING
Piston Pump Installation (Fig. 66 & 67)
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor-
mation section.
1.
install fittings to pump using marks made during the re-
moval process to properly orientate fittings.
If hydraulic fittings were removed from piston pump,
2.
Position and secure piston pump to the pump mount
plate with both flat washers, cap screws, and lock nuts.
4.
Disconnect all hydraulic hoses connected to the hy-
draulic fittings on the piston and gear pumps. Allow
hoses to drain into a suitable container and plug hose
openings to prevent contamination.
3.
ing onto the piston pump shaft with bushing flange to-
ward pump housing.
Place key into pump shaftslot. Slidetaper lockbush-
4.
lock bushing are thoroughly clean (no oil, grease, dirt,
rust, etc.).
Make sure that tapered surfaces of pulley and taper
CAUTION
Support piston and gear pumps when removing
them from the pump support and pump mount
plate to prevent them from falling and causing
personal injury.
5.
Position pulley to taper lock bushing and align non--
threaded holes of pulley with threaded holes ofbushing.
Loosely install three (3) cap screws with lock washers to
bushing and pulley.
5.
Remove fasteners and spacers securing the pump
6.
positions on the piston pump.
Install o--rings and hydraulic fittings to their original
mount plate to the engine and pump support. Note loca-
tion of cap screws, washers, nuts and spacers for as-
sembly purposes. Pull pump mount plate with pumps,
pump pulley, and idler assembly from the machine.
Note:
Ifinstallinganewgearpumptothepistonpump,
make sure to remove the plug from the suction port of
the gear pump (Fig. 68). The gear pump suction fitting
must be on the same side as the trunnion of the piston
pump.
6.
Remove both cap screws and flat washers securing
gear pump tothe pistonpump. Separate gear pumpand
o--ring from the piston pump. Plug openings of gear
pump to prevent contamination.
7.
Remove plugs from the gear pump. Secure o--ring
andgearpumptothepistonpumpwithbothflatwashers
andcapscrews. Torquefasteners from27 to31 ft--lb(37
to 42 N--m).
7.
If hydraulic fittings are to be removed from piston
pump, mark fitting orientation to allow correct assembly.
Remove hydraulic fittings and o--rings from the piston
pump as needed.
8.
Remove pulley from the taper lock bushing:
A. Remove cap screws securing pulley to the taper
lock bushing.
IMPORTANT: Excessive or unequal pressure on the
cap screws can break the bushing flange.
B. Insert cap screws into threaded removal holes of
the pulley. Tighten screws progressively and evenly
until the pulley is loose on the bushing. Remove
pulley from the bushing.
9.
pump. Remove bushing from the pump shaft.
Loosen set screw that secures bushing to piston
2
1
10.Remove
screws that secure the piston pump to the pump mount
plate. Remove pump from plate.
both lock nuts, flat washers, and cap
Figure 68
1.
Gear pump
2.
Suction port
Hydraulic System (Rev. D)
Page 4 -- 96
Groundsmaster 3500--D
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| Language | English |
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