Flywhee 1 - Westerbeke WPDS-20 Technical Manual

A23
OIL PUMP
1. Remove the pump cover.
2. Check the rotor end-float against the figure in
Data. Excessive end-float can be corrected by
lapping the pump body face.
3. Check the diametrical clearance between the outer
rotor and the pump body against the figure in Data.
Renew the rotors, or pump body, or both, as
necessary to correct excessive clearance.
Data
Oil pump rotor end-float
Outer rotor to body diametrical clearance
Rotor lobe clearance:
C030r
00302
4. Check the rotor lobe clearance (in two positions)
against the figure in Data. Renew the rotors if
clearance is excessive.
5. Reassemble the components, ensuring that the
chamfered end of the outer rotor is innermost in
the pump body.
·005 in. (·13 mm.) maximum
·010 in. (·25 mm.) maximum
·008 in. (·2 mm.) maximum
·006 in. (·15 mm.) maximum
FLYWHEEL
1. If the teeth on the starter ring are worn or dam-
aged, remove the starter ring by drilling a hole and
splitting the ring across the hole with a hammer
and chisel.
2. Heat the new starter ring uniformly to the tem-
Data
Starter ring fitting temperature
perature given in Data; the strip of temperature-
indicating paint on the ring will change from pink
to grey at the correct temperature.
3. Fit the starter ring with the tooth chamfer facing
away from the flywheel register.
200
0
to 230
0
C. (39r to 446
0
F.)