Table of Contents
Advertisement
7. Soak gun block in gun cleaner.
CAUTION
Do not allow gun block or component parts to soak in
gun cleaner for extended periods of time, such as
overnight, as certain solvents may cause corrosion or
pitting.
Do not soak gun block o-rings in gun cleaner. To clean
o-rings, dip in gun cleaner and immediately wipe dry.
8. Reassemble resin (rear) seal screw and resin seal
o-rings into gun block.
9. Reinstall gun block using gun block mounting
screws.
Pressure Check Valving Rod
Resilient Sleeve
Perform this test to check seal created by interference fit
between resilient sleeve and opening in throat.
1. Follow Pressure Relief Procedure, page 12.
2. Remove the pattern control tip and front impinger;
see Pattern Control Tip, page 16.
3. Remove coupling block and check valves; see Cou-
pling Block and Check Valves, page 18.
4. Remove rear impinger and throat; Impingers, page
19.
5. Turn on proportioner, and with only the resin manual
valve open, determine if there are resin leaks at
front (Iso) surface of throat.
Should be protruding
312888D
6. Set safety stop to SERVICE (CLOSED), and then
pull trigger to determine if weepage occurs in this
position.
Weepage
7. If weepage is observed in either step, replace valv-
ing rod and/or throat. See Valving Rod and Resil-
ient Sleeve, page 17, to replace valving rod. See
Impingers, page 19, to replace throat.
If throat is not properly seated in gun block, mate-
rial leakage will occur around outer area of throat. If
this occurs, insert throat wrench over resilient
sleeve and tighten throat.
8. Close resin manual valve.
Repair
21
Advertisement
Table of Contents
