MAC TOOLS MW150K, Руководство пользователя

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OM-154 500 Page 11
4-4. Gun Maintenance
READ SAFETY BLOCKS at start of
Section 4 before proceeding.
WARNING
FLYING METAL CHIPS AND DIRT can cause injury and damage equipment.
•
Point gun away from people and in a safe direction when blowing out with compressed air.
swarn10.1 10/91
Turn Off and unplug unit.
1 Wire Spool
Cut welding wire off at contact tube.
Retract wire onto spool and secure.
2 Gun Securing Knob
Loosen knob and remove gun and
trigger plug.
3 Nozzle
4 Contact Tube
5 Head Tube
6 Liner Collet
Disassemble gun as shown.
7 Liner
Pull liner from this end. Blow gun
casing out with compressed air.
Insert new liner into gun casing until
even with end of head tube.
Install collet onto liner.
Install contact tube and nozzle.
Insert gun into feeder and mark
where liner touches drive roll. Re-
move gun and cut liner off. Reinstall
gun so that liner is as close as
possible to drive rolls without touch-
ing.
Thread welding wire (see Section
2-6). Close door.
Ref. ST-149 629-C / Ref. ST-155 509
Tools Needed:
3/8 in
3
2
1
4
5
7
7
6
6
Figure 4-3. Gun Maintenance
4-5. Troubleshooting
READ SAFETY BLOCKS at start of
Section 4 before proceeding.
WARNING
Welding Trouble Remedy Section
No weld output; wire does not feed. Secure power cord plug in receptacle. 2-5
Motor fuse F1 open, replace fuse. 4-2
Replace building line fuse or reset circuit breaker if open. – –
Secure gun trigger plug in receptacle or repair leads, or replace trig-
ger switch. 2-4
No weld output; wire does not feed; fan
motor continues to run and pilot light is
off. Thermostat TP1 open (overheating). Allow fan to run; the thermo-
stat closes when the unit has cooled. 4-1
No weld output; wire feeds. Connect work clamp to get good metal to metal contact. Figure 3-2
Replace contact tube. 4-4
Low weld output. Connect unit to proper input voltage or check for low line voltage. 2-5