Miller Electric S-21E - Manual (Page 30)

10-2. ALIGNING DRIVE ROLL AND WIRE GUIDE
(Figure 10-1)
A WARNING: ELECTRIC SHOCK can kill.
Do not touch live electrical parts.
• Shut down wire feeder and welding power
source, and disconnect input power
employing lockout/tagging procedures
be ore working on feeder.
Lockout/tag9ing procedures for wire feeder
consist of disconnecting interconnecting cord,
and for welding power source consist of pad-
lockin9 line disconnect switch in open position,
removing fuses from fuse box, or shutting off
and red-tag9ing circuit breaker or other discon-
necting device. Stop engine, and disconnect
negative (—) battery cable from battery on weld-
ing generators.
MOVING PARTS can cause serious injury.
• Keep away from moving parts.
HOT SURFACES can cause severe burns.
• Allow cooling period before servicing.
Maintenance to be performed only by qualified
persons.
The drive roll and wire guide must be aligned for wireto
feed properly. Alignment isfactory set and should not re-
quire readjustment. To check alignment, compare drive
roll and wire guide positions with Figure 10-1. If align-
ment is necessary, proceed as follows:
Behind the drive roll mounting hub is a spring washer. To
obtain proper alignment of the drive roll with the wire
guide, rotate drive roll mounting hub securing bolt, and
move drive roll in or out until groove in drive roll lines up
with wire guide (see Figure 10-1).
Wire Guide_-
CORRECT
A
ALIGNMENT
Drive Roll
Washer
INCORRECT
ALIGNMENT
Secrurlng
Bolt
Welding Wire
V
Drive Roll
Mounting Hub
View Is from top
of feeder looking
down with pressure
roll assembly open
I
SA 145763
10-3. REINSTALLATION OF HUB ASSEMBLY (Fig-
ure 10-2)
A WARNING: ELECTRIC SHOCK can kill.
• Do not touch live electrical parts.
• Shut down wire feeder and welding power
source, and disconnect inputpower employ-
ing lockout/tagging procedures before work-
ing on feeder.
Lockout/tagging procedures for wirefeeder con-
sist of disconnecting interconnecting cord, and
for welding power source consist of padlocking
line disconnect switch in open position, remov-
ing fuses from fuse box, or shutting off and red-
tagging circuit breaker or other disconnecting
device. Stop engine, and disconnect negative
(—) battery cable from battery on welding gen-
erators.
If it should become necessary to replace any part of the
assembly, obtain part and proceed as follows to reinstall
the assembly.
1. Slide the following items onto the spool support
shaft in order given:
a. Fiber Washer
b. Brake Washer
c. Hub
d. Brake Washer
e. Fiber Washer
f. Keyed Washer
g. Spring
h. Wire Reel
i.
Wire Retainer
j. Spanner Nut
k. Retaining Ring
2. Rotate bolt into support shaft. Bolt should be ro-
tated only until a slight drag is felt while turning
hub.
3. Install retaining ring on hub.
10-4. BRUSH INSPECTION AND REPLACEMENT
A WARNING: ELECTRIC SHOCK can kill.
• Do not touch live electrical parts.
• Shut down wire feeder and welding power
source, and disconnect input power employ-
ing lockout/tagging procedures before work-
ing on feeder.
Lockout/tagging procedures forwire feedercon-
sist of disconnecting interconnecting cord, and
for welding power source consist of padlocking
line disconnect switch in open position, remov-
ing fuses from fuse box, or shutting off and red-
tagging circuit breaker or other disconnecting
device. Stop engine, and disconnect negative
(—) battery cable from battery on welding gen-
erators.
Figure 10-1. Reinstallation Of Hub Assembly
TM-1571 Page 26
1. Remove two brush caps located on end of the
drive motor.
S-21E