70 Maintenance Procedures
Figure 4-10 Inlet Check Valve Removal
Cleaning the Inlet Check Valve
7. Check the retainer and the ball and seat for damage or debris (Figure 4-11). Clean or
replace worn parts as necessary. The housing seal, which may be difficult to remove,
does not normally need to be replaced.
Figure 4-11 Inlet Check Valve Assembly
8. Clean the check valve by sonicating in water, followed by sonicating in methanol.
Note: To prevent contamination after sonicating, handle the ball in the valve with
tweezers.
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