Crystal T-1-CPF Hydraulic Comparator - Manual (Page 11)

Operation and Maintenance  9
Type T Pump Operation Manual
4 Zero the reference indicator and the device under test.
5 Close the vent valve.
6 Operate the pump handle to achieve a system pressure close to, but less than, your desired target pressure.
7 Pull the pump handle to the top of its stroke.
8 Push in the valve rod selector to select the high pressure/low volume setting.
9 Wait for the pressure to stabilize.
10 Carefully push down the pump handle to achieve the target pressure.
Note: Below 3500 psi, you may also use the fine adjust knob for small pressure adjustments.
11 After obtaining your readings, open the vent valve to vent the system.
!
WARNING: The device under test and the reference indicator should only be removed when there is no pressure in the system.
„„„„ „ PRIMING
All pumps are thoroughly tested at the factory before shipment. One of the most common difficulties encountered is the loss of prime, which is evidenced by
an inability to build pressure. This is caused by entrapped air in the reservoir, which may collect in the high pressure/low volume check valve. When this oc-
curs, the pump will not develop pressure with the valve rod selector positioned in, to the high pressure/low volume setting. The following priming procedure
will correct the condition.
Note: For priming purposes, pump vigorously with full strokes of the hand lever.
Note: Verify the pump reservoir has sufficient fluid.
X To Prime the Pump
1 Connect a reference indicator with a pressure range of at least 5000 psi to the manifold.
2 Plug the remaining port of the manifold.
Manifold Plug