VC
17
©Copyright Eaton Corp., 2019. All rights reserved.
4.5
Disassembly of the Element
4.5.1
Lay the element flat on a clean work surface.
4.5.2
Remove the side plate and clean for reassembly. If
the torque bar holes are elongated more than one-
half the diameter of the pin on the end of the torque
bar, the side plate must be replaced.
Snap Ring and Counterbore Eliminated
Figure 14a
11.5VC500
24VC650
42VC650
24VC1000
14VC500
28VC650
14VC1000
28VC1000
16VC600
33VC650
16VC1000
32VC1000
20VC600
37VC650
20VC1000
Counterbore Eliminated and Second
Snap Ring Groove Added
Figure 15b
38VC1200
46VC1200
51VC1600
42VC1200
52VC1200
60VC1600
66VC1600
4.5.3
Remove the friction shoe assemblies, torque bars
and release springs. If the torque bars and springs
come out of the element with the friction shoe
assemblies, carefully tap them out of the backing
plate cavities. Note wear and replace as necessary.
4.5.4
Remove the air connection elbows and spiral snap
rings which secure the air actuating tube to the rim.
Smaller size elements do not use snap rings.
Carefully remove the air actuating tube from the rim
and thoroughly inspect. Replace if necessary.
Note
: The snap rings may no longer be required on
certain size elements. Also, rims manufactured
before 1984 were counterbored at the tube valve
hole to accept the snap ring. This counterbore has
been eliminated, and a second snap ring groove
has been added to the tube valve. See
Figure 14
.
4.5.5
Remove the remaining side plate only if it is to be
replaced.
⚠
CAUTION
Whenever the element is removed and
disassembled, it is always good practice to
replace the release springs.
4.6
Friction Lining Replacement
⚠
CAUTION
Use only genuine Airflex replacement parts.
4.6.1
Make sure the torque bars and release springs
have been removed from the backing plates.
4.6.2
For riveted friction shoe assemblies, drill the rivets
with a
15/64
inch (6 mm) drill and tap the rivet body
out. Larger elements have linings attached with flat
head screws and locknuts. Airflex special wrench
p/n
304572
will aid in holding the locknuts during
removal. See Table 7.
TABLE 7
FRICTION SHOE ASSEMBLY FASTENERS
DRIVE PIN RIVETS
11.5VC500
24VC650
42VC650
24VC1000
14VC500
28VC650
14VC1000
28VC1000
16VC600
33VC650
16VC1000
20VC600
37VC650
20VC1000
FLAT HEAD SCREWS* (BRASS) AND LOCKNUTS
32VC1000
46VC1200
60VC1600
76VC2000
38VC1200
52VC1200
66VC1600
42VC1200
51VC1600
76VC1600
* Screws are 3/8-16NC2 X 1.25 long flat head and should be
tightened to 12 ft-lbs. (dry)
4.6.3
Attach the new lining to the backing plate with new
screws and locknuts or drive pin rivets (See
Figure
15
), as applicable. Work from the center of the