Common Faqs - Dukane VWA-4300 User Manual

Hydraulic Pressure as shown in Figure 10 - 9. Refer
to Table 6-II, Page 86.
The welders are checked with a phase meter during
assembly to ensure the phases are wired correctly and
the pump is rotating in the proper direction. The poly-
phase pump motor is bidirectional and proper rotation
can be established by reversing two power leads. To
correct the problem, have an electrician swap any two
of the high voltage power leads feeding power to the
main breaker of the welder.
4. Check that the fluid level in the sight glass is at 50%.
The fluid should be clear (not cloudy or dark) with a
slight yellow tint.
5. If none of these actions correct the problem, there may
be something wrong with your hydraulic unit.

Common FAQs

1. Q: Do I need to service the hydraulic unit?
A: Yes, but thankfully not that often. You should
replace the filter every one to two years, and change
the fluid every (or at most every other) filter replace-
ment, depending on the total operational hours on the
hydraulic unit.
2. Q: The pump makes noise and a crackle sound. What
is causing this?
A: Pump noise and crackle is most often caused by
air entering the pump suction fitting. Tightening the
suction fitting (Figure 10 -10) will usually eliminate
such problems. If the pump fails to prime, vent the
pump discharge to atmosphere to reestablish fluid flow.
3. Q: What should I do with the eight grease zerks on
the machine?
A: We recommend you grease the zerks once or twice
a year (in severe environments you might want to do
it more often) with a good general-purpose industrial
.
grease
4. Q: An alarm message says: E- STOP OR SERVICE
Dukane Manual Part No. 403-592-00
Continued from Previous Page
Air Filter Cap
Air Filter Cap
Figure 10 - 10
Section 10 - Troubleshooting
Push In &
Push In &
Twist Counterclockwise
Twist CCW
To Remove
To Remove
Hydraulic Suction Fitting
High Pressure
High Pressure
Supply Line
Supply Line
To Valves
To Valves
Pump
Pump
Suction
Suction
Fitting
Fitting
High Pressure
High Pressure
Return Line
Return Line
Continued
Page 127