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WARNING
Before attempting to perform any maintenance on this
gun,relieve All Fluid and Air Pressures!
•
To relieve fluid and air pressures:
•
Turn OFF all air supplies at system except gun trigger
air.
•
Trigger the gun until all fluid pressures have been
relieved.
•
Turn OFF the gun trigger air at the system.
•
Turn proportioner off.
•
Trigger the gun until all trigger air pressure has
been relieved.
Perform Gun maintenance as follows:
Check for leaking seals (41).
1.
•
Engage piston lock.
•
Turn OFF the gun incoming air by closing gun air
valve.
•
Turn ON the material ball valves.
•
Wait approximately 10 - 20 seconds, then turn ON
the incoming air by opening gun air valve.
•
Repeat two or three times.
•
If any material has been purged from the gun, the
seals (41) or o-ring (42) are leaking.
•
Correct leaks by replacing the seals or o-rings and
re-checking.
Section 3 - General Information: Maintenance
Check the material valves (Part No. 256459, 256460)
2.
for any leaks:
•
Turn OFF both material valves.
•
Disengage piston lock.
•
Trigger the gun several times.
•
Wait approximately 10-20 seconds.
•
Trigger the gun several times.
•
If additional material is purged, the material valves
are leaking.
•
Correct the leaks by taking off red and blue knobs
and turning packing 1/8 in. to 1/4 in. turns at a time
until the leak has stopped. Re-check.
Check side blocks
3.
•
Turn OFF the air valve.
WARNING
Before removing the side blocks make certain that both ma-
terial valves are in the OFF position. Then trigger the gun
several times to relieve pressure.
If the material valves are on when the side blocks are
removed the gun will quickly become encased in urethane!
WARNING
Point gun side blocks down, away from all personnel.
Existing fluid pressures could cause material to exit the
side blocks with considerable force.
16
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