Ametek T - Pump Does Not Hold Pressure; Replace Discharge Check Valve O-ring

Support  17
Type T Pump Operation Manual
Pump Does Not Hold Pressure
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Problem: The pump operates but the pressure declines beyond normal adiabatic eects.
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Solution: One of two o-rings may be leaking. As the pressure drops, observe the hand lever. If the hand lever rises, the discharge check valve is leaking and
its o-ring should be replaced.
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To Replace the Discharge Check Valve O-ring
1 Remove the plug and o-Ring from the front of the pump body.
2 Use a screwdriver to loosen and remove the retaining plug. then remove the guide rod, spring, valve poppet and check valve o-ring.
3 Inspect the check valve o-ring, and replace it if necessary. Then re-install the o-ring, valve poppet, spring, and guide rod.
4 Thread in the retaining plug until it is tightly seated. Then back o 3 ½ turns to provide sucient travel for the valve poppet.
5 Install the check valve plug and o-ring.
Guide Rod
Retaining Plug
Spring
Valve Poppet
Check Valve O-ring