Magnum Venus Plastech APS E-FIT-F-CMB-APS-6 - Manual (Page 9)

BASIC TROUBLE SHOOTING GUIDE FOR “AT” GUNS
Problem
Air leaking from exhaust port on back
handle while trigger is OFF position.
Air leaking from exhaust port on back of
handle while trigger in OFF or ON
position.
Catalyst leaking from catalyst tip while
gun is sitting, not being triggered.
Catalyst leaks from week hole on
catalyst side of gun.
No catalyst is coming from gun.
Material is leaking from tip (front of gun).
Material is leaking from weep hole on
material side of gun.
Possible Cause(s)
O-ring material worn or cut.
O-rings on catalyst piston worn or cut.
O-rings on trigger valve worn or cut.
O-rings on trigger valve worn or cut.
O-rings on catalyst valve and/or material
piston worn or nicked.
O-rings on catalyst valve worn or cut.
O-rings on catalyst valve worn or cut.
Catalyst air piston is not actuating.
Plugged catalyst restrictor (allen screw
with orifice located in front of catalyst
valve).
Plugged catalyst passageway in head of
gun or catalyst tips.
No catalyst flow to gun.
Loose diffuser seat.
Worn needle and/or seat.
O-ring on diffuser nicked or cut.
Loose diffuser seat.
Worn needle packing
Recommended Solution
Replace O-rings.
Replace O-rings.
Replace O-rings.
Replace O-rings.
Check for clogged catalyst air passages
(small holes underneath back cylinder).
Note: There is more than one
passageway from holes.
Clean and clear orifice in front of
catalyst valve.
Inspect, clean and clear passageways.
See “Slave Pump-Trouble Shooting”
Tighten diffuser seat 1/4 to 1/2 turn at a
time until snug and then one more 1/4
turn. Over tightening of diffuser seat
may cause bindng of material needle.
Replace worn items.
Replace O-rings.
Adjust until snug. Then turn 1/4 to 1/2
turn more. Don’t over tighten.
Replace packing and adjust as indicated
above.