Bendix Commercial Vehicle Systems EB/ES BRAKES SERVICE MANUAL - Manual (Page 33)

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Inspection
Inspection
4. Check the linings and replace with Bendix OEM grade shoe and
lining assembly if contaminated, cracked, or worn to less than 1/4"
(6.4mm) thickness at any point (see instructions below) or 3/16"
(4.5mm) for EB/ES 150-4L brake.
NOTE: To eliminate premature Lining Replacement Bendix recom-
mends the use of the Bendix Brake Lining Wear Gauge to accurately
measure lining thickness. This tool is available through Bendix as
BW7261.
Important: For use with air actuated cam brakes where minimum
allowable lining
thickness is 1/4 in.
(Note: Do not use for
strip linings on 15 x 4
brakes or similar
brakes.)
1. With the brake not
applied, place the tip of
the gauge between the
two lining blocks,
between the top of the shoe table and drum. Use the gauge to scrape
away any mud, rust, or other contaminants that could interfere with
proper lining measurement.
2. Remove the gauge from the brake.
3. With the vehicle’s brakes applied, try to put the gauge between the
two lining blocks and the top of the shoe table. Note “hook” of gauge
allows insertion around worn drum lip. If the tip of the gauge will not
fi t between the brake drum and the top of the shoe table, the lining is
worn below 5/16 inch
and will need to be
replaced.
4. If the tip of the gauge
fi ts between the brake
drum and the shoe
table, the lining is not
worn below 1/4 inch at
this time.
Shoe and Lining Inspection
1. Check shoes for bent or cracked webs, or table, broken welds,
loose rivets or elongated rivet holes. Refer to Figure 36. If any are
found, replace with Bendix OEM grade lining and shoe assemblies.
2. Check anchor pin and cam roller contact areas in shoe webs for
elongation or wear. Replace shoe if diameter exceeds the following
specifi cations.
Brake Roller Anchor
Model End Pin End
All EB, All ES-165 0.836" 1.400"
ES-150-4D,
ES-150-8D, F & 6D
ES-165-7M 0.774" 1.280"
3. ES-165-7H severe duty brake only: Anchor pin bushings are
mounted in these brake shoes. Refer to Inspection-Spider
Inspection (Double Anchor Pin) for instructions.
NOTE: Two-piece roller and pin are mounted in brake shoes for 7H
model brake. Do not remove roller and roller pin unless: the roller
does not roll freely, there are fl at spots on the rollers or there is more
than 0.025" play between roller and pin. Replace roller and pin if
these conditions are found.
Figure 36. Shoe and Lining Inspection
5. Because brake shoes can wear at different rates, check both shoes
on each brake and all brakes on the vehicle.