Tweco A60 Cutmaster - Manual (Page 92)

CUTMASTER A60
SERVICE Manual 0-4981 5-6
5.06 Circuit Fault Isolation
WARNING
The following procedures should not be attempted
by anyone who has not had proper training or
authorized to do so.
A. Cover Removal
1. Remove the upper and lower screws which secure the
cover to the main assembly. Do not loosen the lower
screws inside the cut out slots in the bottom of the
cover.
NOTE
The upper screws and lower screws are not the
same. Do not mix them. The upper screws are
for threading into the plastic of the front and rear
panels. DO NOT use the finer threaded lower
screws for this.
2. Carefully pull the Cover up and away from the unit.
B. Cover Installation
1. Reverse previous procedures for cover installation.
NOTE
When installing the upper screws, attempt to reuse
the original threads. The easiest way to do this is
by turning the screw counter-clockwise until you
feel the threads line up, then begin to turn the
screw clockwise to tighten to 15-18 in. lbs. Do
not over tighten.
C. Filter Element Assembly Replacement
The Filter Element Assembly is in the rear panel. For better
system performance, the filter element should be checked
per the Maintenance Schedule (Subsection 5.02), and either
cleaned or replaced.
1. Remove power from the power supply; turn OFF the
gas supply and bleed down the system.
2. Remove the system cover. See "A Cover Removal" in
this section.
3. Locate the internal air line and the fitting from the filter
assembly. Number 1 in the following illustration.
4. Hold a wrench or similar tool against the locking ring
on the filter assembly fitting, then pull on the hose to
release it. (Numbers 2 and 3 in the following illustra-
tion).
5. Remove the fitting from the filter element assembly
by inserting a 6 mm hex wrench into the internal hex
fitting and turning it counter clock-wise (left). Numbers
4 and 5 in the previous illustration.
6. Disconnect the input line from the filter element as-
sembly.
7. Remove the filter element assembly through the rear
opening.