TABLE 5
FRICTION MATERIAL THICKNESSES
NARROW SERIES
Minimum
Original Lining
Element
Allowable Lining Thickness,
Size
Thickness, in. (mm)
in. (mm)
11.5VC500 thru
.I5 (3,8) .33 (8,4)
20VC600
24VC650 thru
.I5 (3,8)
.45 (11,4)
28VC650
33VC650 thru
.28 (7,l) .58 (14,7)
42VC650
12VCl000 thru
20VC1000
24VC1000 thru
28VC1000
32VCl000 thru
42VC1200
46VC1200 and
52VC1200
51,60, and 66
VC1600
WIDE SERIES
.15 (3,8) .33 (8,4)
.15 (3,8)
.45 (11,4)
.38 (9,5)
.58 (14,7)
.38 (9,5) .69 (17,5)
.30 (7,6) .67 (17,0)
4.1.1.2
4.1.1.3
Contamination of Shoes or Drum -
Oil or
grease contamination will reduce the
developed torque of the clutch or brake
Disassembly will be required to clean any oil
or grease build-up. In extremely dusty environ-
ments, dust may accumulate in the backing
plate cavities to the point where the friction
shoes will not properly retract. Dust accumula-
tions may be vacuumed out of the cavities.
n
T
Caution:
0
Do not attempt to use a solvent to
remove oil or grease without first
removing the element. While squirting
a solvent into an installed clutch or
brake may improve performance tem-
porarily, a fire hazard exists from the
heat generated during slippage.
A
f
Caution:
l
/
\
Do not use compressed air to blow
dust accumulations out of the backing
plates. Although the friction material
does not contain asbestos, the dust
created as the friction material wears,
along with the dust from the operating
environment, may irritate the respiratory
system.
Air Control Components
- Check for proper
adjustment of the air control components.
Make sure the safety pressure switches, if
used, are set correctly. Repair any air leaks
as discovered.
VC 5000
Revised: July, 1995 (PDF format)
4.1.2
4.1.2.1
4.1.2.2
12
Partial or complete disassem
inspect the following items:
bly is
required
to
Drum Diameter Wear -
Check the O.D. of the
drum and compare to the values shown on
Table 6. Minor heat-checking may be removed
by machining the drum O.D. If the drum has
been subjected to excessive heat, the open
end may flare out, giving the impression that
the drum has not worn. It is therefore import-
ant to check the diameter at several locations
across the face.
Caution:
Operation of the clutch or brake on
a drum that has worn or has been
TABLE 6
DRUM WEAR LlMlTS
NARROW SERIES
Maximum Allowable
Element
Wear on Drum Diameter *
Size
in. (mm)
11.5VC500 thru 16VC600
.09 (2)
20VC600 thru 24VC650
.I2 (3)
28VC650
.I9 (5)
33VC650 thru 42VC650
.I9 (5)
WIDE SERIES
12VCl000 thru 16VCl000
.09 (2)
20VCl000 thru 24VCl000
.I3 (3)
i
28VCl000
I
.I9 (5)
I
32VCl000 thru 38VC1200 .I9 (5)
42VC1200 thru 46VC1200
.25 (6)
52VC1200 thru 66VC1600
.25 (6)
* Note: The number preceding the letters
“VC” in the element size designates the
original drum diameter in inches.
Example: 16VC600 - Original Drum Diameter
= 16.00 inches (406mm).
Minimum allowable drum diameter is:
16(406) - .09(2) = 15.91(404).
Air Actuating Tube
- Check that the tube has
not been damaged by excessive heat. If any
portion of the tube is hard or charred, the tube
must be replaced. Check for any blisters,
which would indicate ply separation. A tube in
this condition must also be replaced.
@
Copyright Eaton Corp., 1995. All rights reserved.
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