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

RAW WATER PUMP
(PN.48080)
(FROM MARCH 2004 PRODUCTION AND ON)
Disassembly
1. Remove the six screws and lock washers, and the sealing
0-ring. Inspect the 0-ring for re-use.
NOTE:
Inspect the impeller for cracks or stiffness and replace
if
necessary.
2. Remove the impeller key.
3. Remove the lock nut and withdraw the drive gear from
the pump shaft and remove the key. [Insert a metal rod
0.19" in diameter thru the hole in the shaft to prevent it
from turning while removing the lock nut].
4. Using snap pliers, remove the snap ring.
5. Press out the shaft and bearing assembly from the pump
housing. Using an arbor press, support the bearings inner
race and press the shaft out of the bearings.
6. Remove the 0-rings from the shaft.
7. Remove the shaft seal from the housing.[Note the seal
face position in the housing so as to re-install the new
seal correctly].
8. Remove the cam screw and sealing washer and withdraw
the cam from the housing.
9. Inspect the shaft support bushing in the pump cover.
Replace if worn.
INSPECTION
REASSEMBLY
Reassemble the pump in the reverse order.
Apply a small amount of petroleum jelly on the lip of the
shaft seal and on the shaft itself when installing the
shaft/bearing assembly into the pump housing.
When installing the pump cam inside the housing, apply a
small amount of Permatex # 1 to the inner surface of the cam
and to the securing screw threads. Remove any excess.
KEY NO.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PARTS LIST
PART NUMBER AND PART NAME QUANTITY
0480809
049172
049170
048500
033458
049171
0302575
048253
034463
048359
033041
033037
046662
048254
049169
034464
RAW WATER PUMP
SHAFT
IMPELLER COVER
IMPELLER KIT (O·RING & GLYCERIN)
CAM
WEAR PLATE
DOWEL
SPRING SEAL WASHER
IMPELLER COVER SCREW
IMPELLER COVER D-RING
D-RING
CAM WASHER
CAM SCREW
SPRING SEAL
LIP SEAL
BALL BEARING
1
6
2
Inspect all parts for wear and corrosion. It is also
17
033045
RETAINING INTERNAL RING
recommended that 0-rings, -gaskets, and seals be replaced.
18
WHEN ASSEMBLING: APPLY A THIN COAT OF
GLYCERIN TO THE INSIDE OF THE COVER, THE
COVER 0-RING, AND THE IMPELLER
033044
RETAINING EXTERNAL RING
EXPLODED VIEW
REPAIR PARTS ARE AVAILABLE
FROM YOUR WESTERBEKE DEALER