REPAIR
PUMP REMOVAL
AND REPLACEMENT
If major repair is needed, order a Parts List for the
specific pump. See ORDERING INFORMATION para-
graph in PARTS LIST section.
Remove pump hold-down bolts, and pump. Remove fly-
wheel if not done previously.
Shut off power to both units. Drain oil from faulty
When installing new pump, be sure flywheel is in line
unit, and bleed down tank. Remove belt guard, loosen
with motor pulley before removing wedge and tighten-
motor mounts and remove belt(s).
ing hub bolts.
Remove discharge tube at pump end. If tube wraps
around crankshaft, remove both ends and any hold-down
straps.
If accessible, remove flywheel at this time. The
(0.27
unit is held on with a keyed shaft and setscrew
and a puller will probably be necessary. All others use a
split hub and key. Remove flywheel by removing hub
bolts and nuts and driving a wedge into split.
NOTE: When removing discharge tube connector from
old pump, loosely install the male coupling on
the discharge tube in the connection to prevent
collapse during removal.
OIL PUMP REPLACEMENT
Remove pump intake filter and the unloader air supply
line of
hp (0.56
and up.
flywheel has not been removed, its weight may
topple pump when the hold-down bolts are
The oil pump is factory machined as an assembly, and
partial replacement is not possible. In the event the pump
(or crank bearing which is part of the pump) is faulty,
replace whole assembly. The assembly is held by four
bolts (see Fig. 7). Order the replacement oil gage sep-
arately if needed. After installation, adjust oil pressure
on replacement pump (see WRONG OIL PRESSURE
paragraph in TROUBLESHOOTING section).
OIL PUMP
X 1 0 8 2 - l
75-7268
Fig. 7. Crankcase Group.
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