Remove Retaining
Rings & Washers

Figure 25 – Anchor Pin Removal

6. Rotate the upper shoe around the cam end,
disengage the roller end from the cam, then unhook
the return spring from the shoe and remove the upper
shoe. Refer to Figure 26. Discard the return spring.

Figure 23 – Retaining Ring and Washer Removal

4. To allow removal of the anchor pin, cut the lockwire
and remove the cap screws from the spider. Refer to
Figure 24.

Cut the Lockwire
and Remove the
Cap Screws

Rotate Upper
Shoe Around
Cam End

Disengage Shoe
End from Cam then
Unhook the Return
Spring and Remove
the Shoe

Figure 24 – Cap Screw Removal

Figure 26 – Shoe Removal

22

Removal / Disassembly
ROLLER REMOVAL
Bendix® ES™-165-07H Severe-Duty Brake,
Continued
7. Remove the lower anchor pin to remove the lower
shoe.
NOTE: Inspect the anchor pin and bushings. If the pin
was seized, or if the bushing is grooved or worn beyond
0.031" (0.79mm), replace the pin and bushing. Always
replace the pins and bushings with each brake reline.

9. Do not remove the roller from the brake shoe, unless:
the roller does not roll freely; there are flat spots on
the roller; or there is more than 0.025" play between
the roller and pin. If removal of the roller is necessary,
use a steel punch to drive out the groove pin, then
push the pin out of the shoe. Discard the roller and
pin. Refer to Figure 28.
Drive Out
Groove Pin

8. Drive out the old anchor pin bushings from the
brake shoe and spider with a suitable driver. Refer
to Figure 27.

Shoe Removal

Drive Out
Bushings with
Suitable Driver

Figure 28 – Groove Pin Removal

10. Clean and inspect remaining brake parts as outlined
in the Removal/Disassembly section of this manual.

Drive Out
Bushings with
Suitable Driver

Figure 27 – Anchor Pin Bushing Removal

23

Removal / Disassembly
SLACK ADJUSTER REMOVAL
Slack Adjuster Removal

1. Remove the cotter pin/retaining clip and clevis pin
from the air chamber pushrod clevis.
2. Turn the adjuster nut counterclockwise until the slack
adjuster is clear of the air chamber pushrod clevis.
Refer to Figure 29.

Remove
Snap Ring

3. Remove the snap ring and outer shim washer(s) from
the camshaft.
4. Note the orientation of the slack adjuster with
reference to the pushrod before removal to ensure
assembly is in the proper orientation. Remove the
slack adjuster with a suitable puller.

Do not hammer on the slack adjuster to remove! Damage
to the slack adjuster and/or camshaft splines may result.

Use Puller
to Remove

Camshaft Removal
1. Under certain situations the hub will need to be
removed before the camshaft removal. NOTE: follow
the hub manufacture guidelines for removal.
2. Grasp the camshaft head and pull the camshaft
outboard to remove.

Air Chamber Bracket Removal
Rotate the Slack Adjuster
Until it is Clear of the Clevis

1. Perform all steps for drum, shoe, slack adjuster,
and camshaft removal as outlined in the Removal /
Disassembly section.
2. Disconnect the chamber air line.

Figure 29 – Slack Adjuster Removal

NOTE: Follow the manufacturer’s instructions for selfadjusting slack adjusters.

3. Remove the attaching fasteners and pull the air
chamber bracket away from the spider. NOTE: On
16.5" diameter brakes with stamped spiders, the air
chamber bracket-to-spider studs are welded into the
spider. Their removal is not required to remove the
air chamber bracket.
NOTE: On the Bendix® ES™-150-04L brake, a stabilizing
nut has to be removed. The bracket-to-spider studs are
welded into the air chamber bracket flange. Their removal
is not required to remove the air chamber bracket.

Bendix® Versajust® LS
Automatic Slack Adjuster

Bendix Versajust GS
Automatic Slack Adjuster
®

®

To prevent personal injury, be sure to “cage” the spring
before removing the spring brake type air-chambers.
NOTE: For information on slack adjuster removal, refer
to the slack adjuster manufacturer's service manual.

Figure 30 – Bendix® Versajust® Automatic Slack Adjusters

24

Removal / Disassembly
Spider Removal

Dust Shield Removal

1. Perform all steps for drum and shoe removal as
outlined in the Removal / Disassembly section.

NOTE: On Bendix® ES™-165-07H, M Brakes, the dust
shield must be removed before the shoes and anchor
pins are removed.

2. Remove the spider-to-axle attachment nuts and bolts.
Refer to Figure 31.
3. Remove the spider.

1. If applicable, remove the screws and the retaining
clip. Remove all screws attaching the dust shield to
the spider (4-6 screws depending on model). Refer
to Figure 32.
2. Remove the dust shield.

Remove All
Four Screws
Dust Shield

Figure 31 – Dust Shield Mounting Hardware Removal

T

Figure 32 – For All 165-XX Models

25

Removal / Disassembly
CLEANING BRAKE PARTS
After removing the brake parts to be serviced, the following
cleaning procedures should be followed:
1. With a wire brush, clean all parts exposed to mud,
road dirt, and salt, including the spider, air chamber
bracket, dust shields, and the exterior of the drum.

A layer of oxidation and dirt on the outside of a brake
drum acts as an insulator and may hinder normal heat
dissipation.
2. Remove excessive deposits by wire brushing.
3. Use a vacuum cleaner to remove the brake dust
from the drums. Wipe the interior of the drums with
a greaseless solvent to remove any spilled oil.

26

The long term effects of non-asbestos fibers have not
been determined. Therefore, precautions should be used
when handling these materials.
See General Information / Lining Material Warning

Inspection
INSPECTION
Drum Inspection
Clean all remaining brake parts thoroughly with a suitable
shop solvent. Wipe dry with a clean, lint-free cloth.
NOTE: This information is general in nature. For specific
brake drum inspection guidelines, refer to the drum
manufacturer’s instructions.
1. Check for cracks, heat-checks, glazing, grooving, runout, and out-of-round. Refer to Figure 33. Cracked
drums must be replaced. Drums which are glazed,
grooved, out-of-round, etc., may be returned to
service if they can be repaired without exceeding
manufacturer’s maximum diameter or run-out
specifications.

Bendix does not recommend the turning or reboring of
brake drums. The reduction of wall thickness reduces
the amount of thermal energy that can be absorbed by
the drum during braking. Also, the decrease in wall
thickness increases the amount of deflection for the
same input load. Both of these are undesirable. If the
drums are refaced or oversized, the new diameter MUST
NOT exceed the maximum diameter marked on the drum
during its service life.

Check for Cracks,
Heat Checks, Glazing
and Grooving

Check Diameter
and
Out-of-Round

Figure 33 – Drum Inspection

2. Check the drum diameter. Replace the drum if it
exceeds the maximum diameter stamped in the drum.

Under no circumstances should the drum be used if it
exceeds the manufacturer’s recommended maximum
diameter or run-out specification.

27

Inspection
INSPECTION
Shoe and Lining Inspection

1. Check the shoes for bent or cracked webs or table,
broken welds, loose rivets, or elongated rivet holes.
Refer to Figure 34. If any issues are found, replace
the shoes with Bendix® OEM-grade lining and shoe
assemblies.
Check Table and Web for Cracks and Bends

Check Both Ends
for Wear and
Elongation
Anchor
Pin End

See Chart for
Specifications

Roller End

Figure 34 – Shoe & Lining Inspection

2. Check the anchor pin and cam roller contact areas
in the shoe webs for elongation or wear. Replace
the shoe if the diameter exceeds the following
specifications.
Bendix® ES™ Brake Model
All ES-165, ES-150-04D,

Roller End

Anchor Pin
End

0.836"

1.400"

0.774"

1.280"

ES-150-06D, ES-150-08D, F
ES-165-07M

3. For Bendix® ES™-165-07H severe-duty brake only:
Anchor pin bushings are mounted in these brake
shoes. Refer to Inspection-Spider Inspection (Double
Anchor Pin) for instructions.
NOTE: The two-piece roller and pin are mounted in the
brake shoes for the -07H model brake. Do not remove
the roller and roller pin unless: the roller does not roll
freely;there are flat spots on the rollers; or there is more
than 0.025" play between the roller and the pin. Replace
the roller and the pin if these conditions are found.
4. Check the linings and replace with Bendix OEMgrade shoe and lining assembly if contaminated,
cracked, or worn to less than 1/4" (6.4mm) thickness
at any point (see instructions that follow) or 3/16"
(4.5mm) for the Bendix® ES™-150-04L brake.

28

NOTE: To eliminate premature lining replacement, Bendix
recommends the use of the Bendix® ES™ Brake Lining
Wear Gauge to accurately measure lining thickness. This
tool is available through Bendix as BW7261.
Important: The wear gauge is for use with air actuated
cam brakes where minimum allowable lining thickness is
1/4". (Note: Do not use for strip linings on 15 x 4 brakes
or similar brakes.)
5. With the brake
not applied,
place the tip
of the gauge
between the
two lining
b l o c k s ,
between the
top of the shoe
table and the
drum. Use the
gauge to scrape away any mud, rust, or other
contaminants that could interfere with proper lining
measurement.
6. Remove the gauge from the brake.
7. With the vehicle’s brakes applied, try to put the gauge
between the two lining blocks and the top of the shoe
table. Note the “hook” of the gauge allows insertion
around a worn drum lip. If the tip of the gauge will not
fit between the brake drum and the top of the shoe
table, the lining is worn below 5/16" and will need to
be replaced.
8. I f t h e t i p o f
the gauge fits
between the
brake drum
and the shoe
table, the lining
is not worn
below 1/4" at
this time.
9. Because brake shoes can wear at different rates,
check both shoes on each brake and all brakes on
the vehicle.

Inspection
INSPECTION
Shoe and Lining Inspection (cont’d)

The long term effects of non-asbestos fibers, have not
been determined. Therefore, precautions should be used
when handling these materials.
See General Information / Lining Material Warning

New- ES-150-08D & 06D
ES-165-07D & L
(Extended Service)
• When the Bendix® ES™ Extended Service linings

require replacement due to normal wear, the lining
thickness will be uniform all along its length.

Wearable
Lining
Remaining
Lining

Minimum
Thickness
At Any Point
1/4" (6.4mm)

Worn ES-150-04D, ES-150-08D, F &
ES-150-06D, ES-165-07D, L & F
(Extended Service)
Wearable
Lining
Remaining
Lining

Minimum
Thickness
At Any Point
3/16" (4.5 mm)
Worn ES-150-04L
(Extended Service)

Figure 35 – Brake and Lining Blocks

29

Inspection
INSPECTION
Camshaft Radial Play Inspection

Camshaft Inspection

The camshaft radial play should be checked any time
the brake shoes have been removed from the vehicle.
Refer to Figure 36.

1. Refer to Figure 37. Check the spline end for cracks,
worn, or deformed splines. Replace as necessary.

1. Mount a suitable dial indicator (with a plunger),
referencing the cam head at the roller contact area.
2. Set the dial indicator to zero.
3. Move the cam head up and down and note the
maximum reading.

If More Than .035"
(.91mm), Replace
Bushings and
Recheck

2. Check the camshaft bushing journals for wear and
corrosion. Replace the camshaft if it shows visible
wear or if roughness is felt in the journal areas.
3. Inspect the camshaft head for brinelling, cracking, or
flat spots. Replace the camshaft if a ridge can be felt
between the worn areas and the cam head surface.

Check for Cracks, Wear, or
Deformed Splines

Check for Wear,
Roughness, and
Corrosion
Move Camshaft,
Note Maximum
Deflection

Check for Wear,
Cracks, and
Flat Spots

Figure 36 – Camshaft Radial Play Inspection

Figure 37 – Camshaft Inspection

4. If the play exceeds 0.035" (0.91 mm), rebush the
air chamber bracket. See Repair/Replacement Camshaft Bushing and Grease Seal Replacement.

Camshaft Bushing and Seal Inspection

27-1

NOTE: Steer and drive axle camshaft bushings and seals
are mounted in the air chamber bracket assembly.
1. Check the bushing for deterioration or wear. The
inner surface must be smooth. If the surface is
rough or abrasive, replace the bushing, see Repair/
Replacement - Camshaft Bushing and Grease Seal
Replacement.
2. Inspect the grease seals. Replace the seal if the lip
is nicked, cut, or distorted. See Repair/Replacement
- Camshaft Bushing and Grease Seal Replacement.

30

Inspection
INSPECTION
Spider Inspection (Single Anchor Pin)

Spider Inspection (Double Anchor Pin)

1. Visually inspect for cracks around the mounting bolt
holes, in the cam area, and around the anchor pin.
Refer to Figure 38. Replace the spider if any are
found.

1. Visually check for cracks around the mounting bolt
holes and cam and anchor pin areas. Replace the
spider if any are found.

2. Check the anchor pin. If it is loose or grooved more
than 0.031" (0.79mm) below the original surface,
replace the spider assembly.
NOTE: Anchor pins are not replaceable on single anchor
pin brake spiders.
3. On the Bendix ES -150-04L brake, check the anchor
pin retaining nut torque. Refer to the last page of this
manual for current torque values.
®

™

Check for Cracks

2. Check the anchor pin and bushings for wear, grooves,
and free movement of the pin. If the pin is seized,
worn, or grooved beyond 0.031" (0.79mm), replace
the pin and bushing. Refer to the Shoe Removal and
Installation Sections for the procedure.
NOTE: Replace the pins and the bushings at each brake
reline.

Air Chamber Bracket Inspection
1. Check for a bent, broken, or cracked arm and cracked
welds. Refer to Figure 39. Replace the bracket if any
are evident.
2. Check the mounting studs (or bolts) for looseness,
damaged threads, or a bent condition. Replace the
mounting stud if any of these conditions are evident.

NextGen Flange
NGHD

NGLW

Legacy Flange
Check Busings
and Seals

Check for Grooved or
Loose Anchor Pin

Figure 38 – Spider Inspection

SPECIAL NOTE: ES-150-04L R.H. brakes use a
right-hand thread anchor pin retaining nut and L.H.
brakes use a left-hand thread nut. Ensure that the nut
is being turned in the proper direction when checking
the nut torque.

Check Welds

Check for Bending
or Cracks

Figure 39 – Air Chamber Bracket Inspection

If the anchor pin turns while checking the retaining nut
torque, the spider assembly must be replaced.

31

Inspection
INSPECTION
Air Chamber Inspection

Slack Adjuster Inspection

To prevent personal injury, be sure to “cage” the spring
before removing the spring-brake type air chamber.
NOTE: This information is general in nature. For specific
air chamber inspection guidelines, refer to the
manufacturer’s instructions.

NOTE: This information is general in nature. For specific
manual or self-adjusting slack adjuster inspection
guidelines, refer to the manufacturer’s instructions.
1. Check the clevis pin bushing for cracks and wear.
Refer to Figure 41. Replace as necessary.
2. Check the splines for chipped teeth and deformation.
Replace the slack adjuster if necessary.

1. Check for air leaks, cracked housing, a bent pushrod,