Tweco XTTM-301 - Manual (Page 55)

Manual 0-4768 5-1 SERVICE
SECTION 5:
SERVICE
5.01 Introduction
This Section describes basic maintenance procedures. No
other adjustments or repairs are to be attempted by other
than properly trained personnel.
WARNINGS
Disconnect primary power at the source before dis-
assembling the torch or torch leads.
Frequently review the Important Safety Precau-
tions in Section 1. Be sure the operator is equipped
with proper gloves, clothing, eye and ear protec-
tion. Make sure no part of the operator’s body comes
into contact with the workpiece while the torch is
activated.
Sparks from the cutting process can cause damage
to coated, painted, and other surfaces such as glass,
plastic and metal.
Handle torch leads with care and protect them from
damage.
A. Torch O-ring Lubrication
O-rings on the torch head require lubrication on a
scheduled basis. This will allow the o-rings to remain
pliable and provide a proper seal. The o-rings will
dry out, becoming hard and cracked, if the o-ring lu-
bricant is not used regularly. This can lead to poten-
tial leaks internally and externally. Failure of o-rings
can cause severe contamination. Contaminants can
destroy or shorten the parts life of tips, electrodes, and
internal torch parts.
Apply a very light film of o-ring lubricant, Catalog
Number 9-4893, to all the o-rings on a weekly basis.
CAUTION
Use only Thermal Dynamics No. 9-4893 O-Ring
Lubricant (Christo Lube MCG-129) with this torch
part. Use of other lubricants may cause irreparable
damage to the torch.
NOTE
DO NOT use other lubricants or grease, they may
not be designed to operate within high tempera-
tures or may contain “unknown elements” that
may react with the atmosphere. This reaction can
leave contaminants inside the torch. Either of these
conditions can lead to inconsistent performance or
poor parts life.
5.02 Common Operating Faults
The following are the more common cutting faults and
possible causes:
1. Insufficient Penetration
a. Cutting speed too fast
b. Torch tilted too much
c. Metal too thick
d. Worn torch parts
e. Cutting current too low
f. Non-Genuine Thermal Dynamics Parts
2. Main Arc Extinguishes
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Cutting current too high
d. Work cable disconnected
e. Worn torch parts
f. Non-Genuine Thermal Dynamics Parts
5
A
B