Section 6. Repair Of External Subassemblies; Oil Pump - CAPITOL HY- 6900 Service Manual

SECTION 6. REPAIR OF EXTERNAL SUBASSEMBLIES

Avoid contact with rotating output coupling and always
shut down engine when doing even minor inspection or
repair. Avoid contact with metal surfaces as operating

6.1 OIL PUMP

A.PRESSURE RELIEF ASSEMBLY
1.With oil pump in place on marine gear remove
dome nut, relief valve insert with screw, spring
and accompanying washers. NOTE: UNSCREW
INSERT CAREFULLY BECAUSE PRESSURE
RELIEF SPRING IS UNDER TENSION.
2.
Check relief plunger to see if it is free moving. If
not, inspect plunger for burrs, heat scores, or
distortions. Burrs may be removed with fine
crocus cloth, otherwise plunger should be
replaced.
CAUTION:
temperature may exceed 200º.
3. Clean all parts with a good grade cleaning
solvent or diesel fuel. Blow dry with compressed
air.
4. Generously lubricate relief plunger with oil or
Vaseline. Insert plunger, cup end last. Check
plunger for free movement
5. Insert pressure relief spring into cup of
plunger.
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