Crystal T-1-CPF Hydraulic Comparator - Manual (Page 18)

Support  16
Type T Pump Operation Manual
7 Examine the port for air bubbles which may adhere to the threads or parts.
Note: If air bubbles are present, repeat steps 2 through 4 until no more air bubbles appear.
8 Replace the check valve plug and tighten partially.
9 If replacing the low pressure/high volume check valve plug... Tighten the check valve plug.
The procedure for the low-pressure/high volume side is now complete.
10 If replacing the high pressure/low volume check valve plug... Use slight pressure on the hand lever to push system fluid past the high
pressure/low volume check valve plug to ensure complete purging of the valve port.
11 Tighten the high pressure/low volume check valve plug.
12 Operate the pump handle until pumping becomes difficult.
13 Raise the pump handle to the top of its stoke.
14 Push in the valve rod selector to the high pressure/low volume position.
15 Resume pumping to verify the pump is operating properly.
Pump Does Not Hold Pressure
X Problem: The pump operates but the pressure declines beyond normal thermodynamic 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 its o-ring should be replaced.