Use and Care Manual

GR2100, GR2200, GR2300, GR3100, GR3200, GR3300
www.campbellhausfeld.com
17
Welding Guidelines (Continued)
WELDING POSITIONS
Four basic welding positions can be used;
flat, horizontal, vertical, and overhead.
Welding in the flat position is easier than
any of the others because welding speed
can be increased, the molten metal has
less tendency to run, better penetration
can be achieved, and the work is less
fatiguing.
Other positions require different
techniques such as a weaving pass,
circular pass, and jogging. A higher skill
level is required to complete these welds.
All work should be performed in the
flat position if possible. For specific
applications, consult an arc welding
handbook.
WELD PASS
Sometimes more then one pass is
necessary to fill the joint. The root pass
is first, followed by filler passes and the
cover pass (See Figures 8 and 9). If the
pieces are thick, it may be necessary to
bevel the edges that are joined at a 60º
angle. Remember to remove the slag
before each pass.
TESTING WELDER / GENERATOR DIODES
1. Use an Ohmmeter to check each individual diode. Diodes must show continuity
in one direction only.
2. This check can also be done using a 12 Volt battery and a light bulb as shown in
Figure 10.
3. If the diodes are operating properly, the lamp illuminates brightly when the
battery polarity is correct, and goes dim when battery polarity is reversed.
4. If there is no change in lamp brightness when polarity is reversed, the diodes must
be replaced.
For testing of rotor, stator, or field windings, consult an authorized
service center.
Figure 10 - Diode Test Procedure
Lamp On
Lamp Off
Cover
Filler
Root
Figure 8 - Weld Passes
Figure 9 - Multiple Weld Passes