Westerbeke W-46 - Page 61

COOLING SYSTEM
5. Raw Water Pump (PN:016423F .
The pump is a positive rep.lacement. type pump, engine driven, with
a replaceable neoprene impeller.
5.1 Disassembly
a. Remove front cover screws
and washers (13) & (14) and
front cover (12) with gasket
(11.)
b. With a pair of screw drivers
positioned 180" apart on the
impeller (10), carefully pry
the impeller from the shaft
and out of the pump body.
c. Remove screw (7) and take
cam (8) out of the pump.
d. Remove key (3) from the
impeller shaft (2).
e. Supper t the pump base in an
arbor press or similar press
and push the impeller shaft
(2) and bearings (4) out of
the pump housing (6).
f. Properly support bearings (4) and remove from shaft (2). In
some disassembly, bearings may remain in pump housing. In
those cases, support the housing and push bearings out.
g. Push seal (9) from inner housing.
(Note placement of seal in housing (seal lip) to reinstall
correctly).
5.2 Inspection
a. Visually examine impeller (10). Look for any cracked or worn
impeller blades. Material should be flexible. Replace if
suspected.
b. Visually examine cover (12) inner surface. Replace if there is
any indication of wear or grooving from the impeller turning on
the inner surface.
c. Check cam (8) for wear. Replace as needed.
d. Check bearings (4) and rotate. Look for binding and any indi-
cations of damage.
IW'IWESTERBEKE
l Engines & Generators
59