April, 2008 IMPCO Technologies Inc. PPI-105-REV.B
3030 South Susan St.
Page 27 of 29
Santa Ana, CA 92704
www.impcotechnologies.com
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Connect one end of a section of 3/16” vacuum hose (H1-11) to the hose nipple on the
pressure test adapter and the other to the outside hose nipple on differential gauge TG-005
(see section B in this chapter for gauge connections).
EPR illustrated with F4-4
•
Test for leaks before opening the LPG tank manual shut-off valve.
•
When reinstalling the test port plug, clean all traces of old sealant from the threads, apply a
little Loctite
TM
567 or equivalent thread sealant on the plug threads and install it into the
LPR/EPR (torque to 10 ft-lb).
•
Test for leaks before opening the LPG fuel shut-off valve.
G. Test Plug for Positive Pressure Regulator:
The Test Plug (also referred to as the special bleed plug) is used on positive pressure regulators to
allow a small amount of air to flow through during testing. The steps on the following page show
the Test Plug used during testing of a PJ regulator.
1. Attach an air hose fitting to inlet at the top and thread
the special bleed plug (shown held on the right) and
the two brass fittings (left). Both the special bleed plug
and brass fittings are included in IMPCO Test Kits ITK-
1 and ITK-4.