Westerbeke 6.5KW - Page 73

Fresh Water Pump Removal
1. Drain coolant from engine block.
2. Remove pump drive belt by loosening the 12 volt alternator
adjusting strap and pivot bolt.
3. Remove coolant hose from pump to manifold.
4. Remove belts mounting pump to engine block and remove pump.
Checking Fresh Water Pump
1. Check for water leaks.
necessary.
Replace cover gasket, cover or pump as
2. Replace pump if abnormal noise or bearing squeak is present.
3. Examine pump and impeller for damage and replace if necessary.
Sea Water Pump Impeller Replacement
The following instructions are general and indicative only. Specific
instructions where applicable may be packaged with your replacement
impeller.
1. Remove the front cover gasket.
2. Remove the impeller by pulling straight outwards, parallel to the
pump shaft. This is best done with a pair of pliers applied to
the impeller hub.
3. Coat the replacement impeller and the chamber into which it mounts
with grease.
4. Carefully align the impeller -keyway, or other locking mechanism,
wi th the shaft. Take care that all the impeller blades bend in
the same direction and trailing.
5. Inspect the front cover for wear. A worn front cover should ulti-
mately be replaced. Sometimes it can be reversed as an emergency
measure, but not when stamped markings would break the seal be-
tween the cover and the impeller blades.
6. Reinstall the end cover with a new gasket.
7. Be doubly sure to check quickly for sea water flow when starting
the engine. The absence of flow indicates that the pump may not
by priming itself properly. This situation must be investigated
immediately or damage to the new impeller will result from over-
heating.
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