Raw Water Pumps - Westerbeke 12C-TWO Operator's Manual

RAW WATER PUMP
(PN. 033636)
EARLY MODELS
Disassembly
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. Remove the six cover plate screws (#13), cover plate
(#12), and the cover plate gasket(#ll).
NOTE:
Screw material should be stainless steel part
number 034463. Also, replacement of the cover gasket
is recommended; however; if you are going to reuse it,
keep the gasket submerged in water until the pump is
reassembled.
If
is is allowed to dry, the gasket will shrink
and not be reusable.
2. Remove the impeller (#9) with its drive screw (#10) from
the pump housing.
3. Remove the screw (#4) and sealing washer (#5) and draw
the cam (#6) from the oump housing.
4. Remove the circlip (#3).
5. Support the pump housing, at the mounting flange end,
on an arbor press and with a drift, press out the shaft (#8)
and bearings (#2) from the pump housing from the
impeller end.
6. With the pump housing supported, push the seals (#7)
out of the pump housing. Push the impeller side seal out
that side and then lift the spacer (#14) out. Then pushthe
bearing side seal out that side,
7. Supporting the bearings inner face (#2), push the shaft
(#8) out of the bearings.
NOTE:
Inspect all parts and replace those showing wear
or corrosion.
Reassembly
1. Install the seals (#7) and spaceJ(#14) in the pumphousing.
Push the impeller side seal into the housing. Rotate the
pump and install the spacer (14) against the seal face.
Push the bearing side seal into the housing from the
bearing side.
NOTE:
The seals flat suiface that have printing and
numbers face toward eaxh other.
2. Install shaft (#8) into bearings. Support the bearings (#2)
at their center race. Push the shaft into the bearings,
pushing at the impeller drive slot end using the base of
the drive slot. Push the shaft through both of the
bearings, flush against each other so that the flat sided
end of the shaft extends beyond the second bearing center
race by 19/32" (15mm), 1132" (.5mm).
11 GASKET
9IMPEllER
8
Lubricate at
ass~~mbtv.
12
35
3. Support the pump housing at the impeller side. Apply a
small amount of glycerin to the seals (#7) inner lips and
to the impeller shaft (#8). Carefully install the shaft
rotating it through the seals until the bearings contact the
housing from the bearing end. Use a pushing tool that
will push this shaft and bearing assembly into the pump
housing by applying pressure against the outer bearing
race. Push the assembly into the housing until the
bearings seat fully in the housing. Install the circlip (#3).
4. Position the cam (#6) in the housing and secure it in
place with the screw (#4) and sealing washer (#5).
NOTE:
Use a small amount of Permatex #1 on the inner
can suiface and screw threads. Remove any excess from
the impeller housing.
5. Apply a light film of glycerin to the inner surface of the
housing for the impeller.
NOTE:
Just coat the suiface, do not overapply. Install the
impeller with the drive screw mating in the slot of the
drive shaft.
6. Install the cover gasket (#11), cover( #9, #12) and secure
with the six cover screws·
KEY NO.
1-1
1-2
1-3
2
3
4
5
6
7
8
9
10
11
12
13
14
15
PARTS LIST
PART NUMBER AND PART NAME
QUANTITY
033636
034457
034466
034464
033044
034462
033037
034456
033043
034460
034440
034459
034461
034463
048013
038679
PUMP (COMPLETE)
HOUSIN.G (PUMP BODY)
KIT (MAJOR REPAIR)
BEARING 2
RING (RETAINING)
SCREW (PUMP HOUSING TO CAM)
WASHER
CAM
SEAL
2
SHAFT 1
KIT (IMPELLER-SCREW-GASKET)
SCREW (IMPELLER-INCLUDED IN N0.9) 1
GASKET (IMPELLER COVER)
COVER (IMPELLER)
SCREW (IMPELLER COVER)
6
WATER SEAL
SPACER
1-2 PUMP HOUSING
Clean and repaint housing.
Check tor cracks.
WHEN ASSEMBLING: APPLY A THIN COAT OF
GLYCERIN TO THE INSIDE OF THE COVER, THE
COVER 0-RING, ANO THE IMPELLER