Tweco VA 4000S Ultra-Feed - Manual (Page 39)

ULTRAFEED VA 4000S
Manual No. 0-5135 5-1 SERVICE
SECTION 5:
SERVICE
5.01 Cleaning The Unit
Periodically, clean the inside of the wire feeder and
feedhead assembly by using a vacuum cleaner or clean,
dry compressed air of not more than 25 psi (172 kPa)
pressure. After cleaning the unit, check all electrical
components for loose or faulty connections and correct
if necessary.
Clean the grooves on the lower drive roll frequently. This
cleaning operation can be done by using a small wire
brush. Also, wipe off or clean the grooves on the upper
bearing roll. After cleaning the feed rolls, tighten the feed
roll retaining knobs accordingly.
The only point of maintenance in the feedhead assembly
is the motor brushes. Inspect these about every 300 hours
of operation. When these brushes are worn to about 1/8"
(3.2 mm), new brushes should be installed.
CAUTION
Neglect in brush maintenance may cause
damage to the motor commutator resulting
in a shorter motor operating life.
5.02 Cleaning The Feed Rolls
Clean the grooves on the lower drive roll frequently. This
cleaning operation can be done by using a small wire
brush. Also, wipe off or clean the grooves on the upper
bearing roll. After cleaning the feed rolls, tighten the feed
roll retaining knobs accordingly.
5.03 System Maintenance
The user has been given a visual tool in the feed monitor
display. Use the feed monitor display in determining when
a new contact tip, liner, and/or wire guide is needed.
5.04 Troubleshooting Guide
NOTE
Refer to the Connection Diagram and the
Schematic Diagram in the Appendix chapter
of this manual for graphical assistance in
disassembling and troubleshooting the wire
feeder.
Scope
The troubleshooting guide is intended to be used by
qualified service technicians. The troubleshooting guide
contains information which can be used to diagnose and
correct unsatisfactory operation or failure of the various
components of the wire feeder. Each symptom of trouble
is followed by a list of probable causes and the procedure
necessary to correct the problem.
Safety
To ensure safe operation and service, read this entire
manual before attempting to service or repair this
machine. The service technician may be asked to check
voltage levels while the machine is turned ON. To assure
safety, use care and follow all instructions accordingly.