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Maintenance
F232058
2. Clean the AC drive fins:
a. Remove the AC drive box cover.
b. Blow the fins clean using compressed
air at a pressure of 60–90 psi or by
using canned compressed air. Use care
to avoid damaging cooling fan or
other components.
Note: No amount of visible foreign matter
should be allowed to accumulate on the
fins or the finger guard.
3. Use the following procedures to determine
if V-belts require replacement or
adjustment. Call a qualified service
technician in either case.
a. Check V-belts for uneven wear and
frayed edges.
b. After disconnecting power to the
machine and removing all panels
necessary for access to the drive belt,
use the following method to verify that
V-belts are properly tensioned.
See Figure 28. Belt deflection should
be measured as close to the center of
the span length as possible. A set force
should be applied in the center of the
span length, as specified in the
following table. Belt tension is adjusted
by turning the setscrew on the idler
pulley. Turning the screw clockwise
tightens the belt, and vice versa.
Figure 28
c. Verify that V-belts are properly aligned
by checking pulley alignment. Place a
straightedge across both pulley faces.
The straightedge should make contact
with the pulleys in four places. See
Figure 29.
Machine
Capacity
(lbs.)
Deflection
(in.)
Force
Applied
(lbs.)
35 0.39 5.6
50 0.43 5.6
85 0.77 11.3
Deflection
Span Length