PRO WELD INTERNATIONAL AG-900, Operation & Maintenance Manual

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PRO WELD
AG-900
For assistance in sever cases, contact your local
sales representative.
10. Incorrect plunge setting. (Adjust to proper
setting)
11. Incorrect lift setting. (adjust to proper
setting)
12. Poor stud quality.
13. Arc shield so far off center from weld end
of stud that stud catches on edge of arc shield
and is not driven back into pool of molten
metal.
7.4 Trouble Shooting Poor Welds
1. Weld Too Hot
A) Decrease weld time.
B) Decrease weld current.
C) Increase stud protrusion.
2. Weld too Cold
A) Increase weld time.
B) Increase weld current.
C) Decrease stud protrusion
3. Arc Blow
A) Use double grounds.
B) Ground too close or not spaced evenly.
4. Hang-Up
A) Re-align arc shield
8.0 MAINTENANCE
(Refer to HD ARC GUN EXPLODED VIEW in Section 10
of this manual for location for “()” numbers noted in this
text.)
8.1 Weld Cable Replacement
Remove legs by loosening set screws (31). Remove chuck
and adapter (1). Take the weld cable (32) off connector
stud (2).
Loosen screws (35A) in cable guide assembly (35) and
remove the clamp (35B). Remove the tape which holds the
control cable to the weld cable.
When replacing the weld cable, it should be clamped 8-1/4”
from the center of the lug and untwisted to relieve the
stranding. Failure to do this will cause undo restriction on
the gun workings. (Re-install rubber sleeve on end of weld
cable.)
With the control cable (34) in front of the weld cable, tape
together 4 1/2” below the bottom of the extension bar. This
will provide strain relief. Tape every 12”
8.2 Control Cable Replacement .
Remove tape holding control cable and weld cables
together. Remove three screws (29) in handle (27).
Disconnect the two wires from switch (28) and the two
wires from the gun coil leads (18).
Install the new cable and re-connect wires to trigger and
gun coil.
Tape control cable to front of weld cable 4-1/2” below
extension bar and tape every 12”.
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