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25: Diamond Products GTXR+ - Owner’s Guide
Valve Maintenance (See Figure 5)
1. Using a 22-mm wrench or socket, remove all six valve caps on the manifold of the
pump.
2. Examine each valve cap O-ring for cuts or distortions and replace if worn.
3. Using needle nose pliers, remove the suction and delivery check valves. The valve
assembly usually stays together when removing. If the valve comes apart, use the
needle nose pliers or reverse pliers to remove the remaining parts.
4. Inspect each suction and delivery check valve assembly for wear and pitting, and
replace if necessary. The valve assembly consists of the plastic cage, spring, valve
seat, poppet and O-ring. One valve kit is needed for complete valve change of one
pump.
Figure 5. Servicing the Valves
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