Service manual

RAW WATER PUMP
PUMP OVERHAUL
\ Disassembly
L
The pump, as removed from the engine, will have hose
attachment nipples threaded into its inlet and outlet port.
They may be left in place
or removed if they interfere with
the pump disassembly. Note the port location and positioning
if removed.
1. Loosen the set screw with an allen wrench and remove the
water pump pulley from the shaft
2. Remove the 4 cover plate screws, cover plate,
and cover gasket.
NOTE: Replacement of the cover plate gasket is
recommended; however, if you are going to reuse it, keep the
gasket well lubricated until the pump is reassembled. If it's
allowed
to dry, the gasket will shrink and not be reusable.
3. Pull out the impeller with long nose pliers or pry out with
a pair
of screwdrivers.
4. Remove the two screws that hold the bearing assembly,
this will release the shaft, bearing and seal assembly.
Removing the retaining rings will allow the bearings and
seals to be disassembled for inspection.
NOTE: It may be necessary to use a drift and arbor press to
press the bearing and seal assembly from the shaft.
I LUBRICATE AT ASSEMBLY
SHAFT
6. Inspect all parts and replace those showing wear
or erosion.
7.
Use the illustration below to assist in reassembling the raw
water pump.
a. apply a small amount of petroleum jelly to"the seal's
inner race and
to the impeller shaft at reassembly.
b. When positioning the cam in the housing use a small
amount
of Perm ate x #1 on the inner cam surface and
cam screw threads, remove any excess from the
impeller housing.
c. Apply a light
film of silicone or petroleum jelly to the
inner surface
of the housing for the impeller.
S. When the
pump is assembled reposition and tighten the
hose nipples. Assemble the pump to the engine and attach
the hoses and belt.
I
COVER
jGASKET
,.- .-'. ~
, RAW WATER PUMP
\718- 71C '
Engines & Generators
40,
IRAW I
,WATER,
PUMP
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