Glas Craft Probler P2 User Manual page 23

.
Trigger the gun to clear out residual pressure in Side
blocks.
3.
Remove the side blocks, p/n 23955-00 & 23956-00.
4.
Remove one of the side block seal housings,
p/n 23959-00 from side block. Leave the seal,
p/n 23973-00 in housing and rinse with suitable
solvent.
5.
Turn the air ON to gun, pull the trigger to actuate the
gun into spray position, when gun pulls back, keep
in mind the purge air will not shut off. Turn air OFF
at the slide valve, p/n 16832-00 before releasing
trigger.
Maintenance
6.
Place seal / seal housing assembly into gun head so
the face of seal sets against the chamber. Look thru the
thru port of the Seal. The side port of the Chamber
should be at the center, or slightly forward of the center
line. If this adjustment appears to be correct, rotate the
seal housing to ensure the air cap, p/n 23961-00 is
not contacting the seal housing, p/n 23959-00. There
should be no contact between these two parts. Contact
will result in chamber damage.
7.
Adjust the set screw, p/n 17259-16F until
a. The side port of the chamber is "on center" with or
forward of center of the thru port of seal.
b. The seal housing can be rotated and does not make
contact with the air cap.
8.
Turn the air ON and re trigger the gun, then shut the
air OFF before releasing trigger. Re-check the throw.
9.
If the set screw feels loose, Remove it from the rear
cap, clean and apply non-permanent thread lock to
threads and reinstall, set adjustment.