0 SERIES
OM−01155
MAINTENANCE & REPAIR
PAGE E − 6
PUMP AND SEAL DISASSEMBLY
Review all warnings in Section A.
Follow the instructions on all tags, label and de-
cals attached to the pump.
This pump requires little service due to its rugged,
minimum-maintenance design. However, if it be-
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional view (see Figures 1 and 2) and the ac-
companying parts list.
Most service functions, such as impeller, wear ring,
and seal replacement, may be performed by drain-
ing the pump and removing the cover plate. How-
ever, due to the confined mounting location of the
pump, it is recommended that the pump and gear-
box be removed from the vehicle for service. The
following instructions assume complete dis-
asembly is required.
If the gearbox requires repair, proceed with
PUMP
AND SEAL DISASSEMBLY
, followed by
GEAR-
BOX DISASSEMBLY
.
Before attempting to service the pump, switch off
the engine ignition and remove the key, or take oth-
er safety precautions to ensure that it will remain
inoperative. Close all valves in the suction and dis-
charge lines.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man-
ual.
2. Switch off the vehicle ignition and
remove the key, or take other pre-
cautions to ensure that the pump
will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau-
tiously.
7. Drain the pump.
After the vehicle is positioned for pump
maintenance, block the wheels and set
the emergency brake before attempting
to disconnect the drive shaft or remove
the pump. Be sure the pump is properly
reinstalled and secured before opera-
tion.
Removing Pump and Gearbox from Vehicle
Due to the confined mounting location of the
pump, it is recommended that the pump be re-
moved from the vehicle for service.
The pump assembly can be seriously
damaged if the cables or chains used to lift
and move the unit are improperly wrapped
around the pump.
Due to the confined mounting location,
specialized equipment such as a transmis-
sion jack with custom brackets should be
used to lift and position the pump and
gearbox.
Close all valves in the suction and discharge lines.
Remove the casing drain plug (34) and drain the
pump. Clean and reinstall the drain plug.
Disconnect the P.T.O. shaft from the gearbox drive
shaft. Remove all the hardware securing the pump
and gearbox to the vehicle chassis. Tie and tag the
any leveling shims used under the casing mount-
ing feet to ease reassembly. Move the pump and
gearbox to a clean, well-equipped shop for mainte-
nance and repair.
