Ametek T Operation Manual page 19

Pump Does Not Hold Pressure
Problem:
The pump operates but the pressure declines beyond normal adiabatic effects.
X
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
X
its o-ring should be replaced.
To Replace the Discharge Check Valve O-ring
X
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.
Check Valve O-ring
Valve Poppet
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 off 3 ½ turns to provide sufficient travel for the valve poppet.
5 Install the check valve plug and o-ring.
Spring
Guide Rod
Retaining Plug
17
Support
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Type T Pump Operation Manual