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Fig. 5 1 4 e a s u r i n g Oil Pump Cover Flatness
(3) Remove
the
pump rotor and shaft and lift out
(4) Remove
the oil pressure relief valve plug and
the
outer pump rotor.
lift out spring and plunger (Fig.
50).
Inspection and Repair
(1) Clean all parts thoroughly. The mating face
of
the oil pump cover should be smooth. Replace the
cover if
it is
scratched
or
grooved.
(2) Lay a straightedge across the oil pump cover
surface (Fig.
51).
If a .0015 inch feeler gauge can be
inserted between the cover and straightedge, the cov-
er
should be replaced.
(3) If the outer rotor length measures less than
.649 inch (Fig. 52), and the diameter less than 2.469
inches, replace the outer rotor.
ENGINE OILING SYSTEM4CYLlNDER
9-25
Fig. 52-Measuring
Outer Rotor Thickness
Fig. 55-Measuring
Outer Rotor Clearance
NY136
,
-DIAMETER
INNER ROTOR
NY137
Fig. 5 3 4 e a s u r i n g Inner Rotor Thickness
INNER ROTOR
\-a
1
NY135
Fig. 54-Measuring
Clearance Over Rotors
NY138
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