WCB11070 (PDF FORMAT)
17
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Copyright Eaton Corp. 2007, All Rights reserved.
4.4
Friction Material Replacment
(Sizes 8 and 14)
Note :
When replacing friction material, it is recom-
mended that the mating wear surface be replaced or
machined flat to ensure good contact between the
mating surfaces. See Table 13 for wear limits.
4.4.1
Friction disc cores may be relined with new friction
material per the following instructions. Refer to Sec-
tion 6.0 for the appropriate friction disc replacement kit
part number.
Use only genuine, Airflex friction material.
Use of material not of Airflex origin may result
in unpredictable brake performance and/or
excessive wear of the brake components.
4.4.2
Drill out the old rivets and discard the old friction discs.
4.4.3
Clean and de-burr the friction disc cores. If rivet holes
in the core are elongated or damaged, the disc core
should be repaired or replaced.
4.4.4
Position the friction discs on both sides of the disc
core and align the rivet holes, using several rivets as a
guide.
Figure 12
Figure 13
Manual setting of the rivets using a punch
very frequently results in splitting of the
clinched end of the rivet. When this occurs,
the rivet will ultimately fail in service due to
fatigue. It is therefore recommended that riv-
ets be set using an automatic rivet setting
machine if possible.
4.4.5
Insert a rivet through any hole and set using a washer
on the clinched end of the rivet.
Figure 12
illustrates
machine setting and
Figure 13
illustrates setting the
rivet manually. When setting manually, use an arbor
press and keep the setting tool square to avoid split-
ting the rivet.
The clinched end of the rivet must have a
washer in place prior to clinching. Failure to
use the washer or use of excessive force
when clinching the rivet will fracture the fric-
tion lining.
4.4.6
The remaining rivets may be installed in any reason-
able sequence following a crosswise pattern.
After replacement of friction material, a mini-
mum wear-in period of four hours at 50% of
the rated horsepower is recommended for the
friction couple to achieve rated torque.
4.5
Friction Material Replacment
(Sizes 18, 24, 36 and 48)
Note :
When replacing friction material, it is recom-
mended that the mating wear surface be replaced or
machined flat to ensure good contact between the
mating surfaces. See Table 13 for wear limits.
4.5.1
Refer to Section 6.0 for the appropriate friction disc (or
block) replacement part numbers .
Use only genuine Airflex friction material. Use
of material not of Airflex origin may result in
unpredictable performance.
4.5.2
Disassemble the tensioner per Section 4.3.
Rivet
Friction
Disc
Washer
Anvil Pin
Friction Disc Core
Driver
Friction Disc
Core
Punch
Washer
Friction
Disc
Anvil
Rivet
