Service Manual

Page 23 A-5
(1)
Malfunction
(2)
Probable Cause
(3)
Corrective Action
(3) Low velocity b. Lack of lubrication in moving parts. b. Check for proper lubrication at all bearing surfaces
and where metal rubs i.e., trigger mechanism,
cylinder assembly, etc.
(4) Gas leaks at
Piercing Ass'y.
Guide Collar &
End Seal
a. Gun has been in storage extended
periods without gas or End Seal
38-25 is compressed from
Powerlet Cap and not permitting a
good seal in cap after piercing.
a. First determine if leak is at End Seal 38-25 by placing
a few drops of oil at Guide Collar 38-24. Bubbling oil
indicates a leak. Place gun aside without a Powerlet
to allow seal expansion. If this does not correct leak,
replace End Seal 38-25.
CAUTION: To determine the location of other leaks requires the removal of Cover 38-5. Do not remove the (5) screws 38-49 and
Cover 38-5 with gun under gas pressure. (Valve system is under 700 P.S.I, pressure under normal conditions). Exhaust all gas and
remove Powerlet.
Using a parallel clamp or suitable clamping tool (Do not use vise grips or sharp jaw tools) attach per drawing. Insure that piercing
Assembly 38-55 is secure and install a Powerlet, tighten Screw Assembly 38-58 as when normally charging gun to be fired. Place a
few drops of Pellgunoil at Tube Bushing Small 38-63, Gland Nut 38-10 and Valve Seat 38-11 to detect any leakage.