21
09
Troubleshooting
Operator’s Manual 1808 022016 ENG
OIL CONTAMINATION
When the pressure has been satisfactory for
some time and then the pressure gradually
increases, this indicates oil contamination. When
this happens clean the oil by using gas ballast or
change the oil. Discolored oil does not necessarily
indicate contamination. onversely, vapors may
contaminate oil and not show any color change.
Oil drying can be checked by the crackling method
(few drops of oil on an aluminum household foil
heated by a match). If crackling does not occur, the
oil is dry to better than a few PPM of water.
DISCHARGE VALVES
When the cause of poor pump performance is
not due to leaks or oil contamination, inspect
the discharge valves. The discharge valves (s ee
Figure 9 -1 on page 21) are located at the
exhaust ports and could malfunction due to foreign
matter preventing them from sealing or they may
be worn to the point that they no longer function
correctly.
ASSEMBLY
ASSEMBLY PROCEDURE
No individual component sales. Discharge valves are sold as an assembly only.
Figure 9-1 – Discharge Valve
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