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BENDIX BW7274 User Manual

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BRAKE DISASSEMBLY
CAST SHOE & "P" SERIES
1.
1.
1.
1.
1.
Insert sturdy lever between end of shoe and spider.
Pry shoe away from  cam until cam rollers can be
removed.  Repeat procedure for opposite shoe.
2.
2.
2.
2.
2.
Unhook shoe return spring by pushing shoes
together, allow tension on spring to be reduced.
3.
3.
3.
3.
3.
Discard shoe return spring and replace with new at
time of reassembly.
4.
4.
4.
4.
4.
Remove snap ring from anchor pin and push anchor
pin through.
NO
NO
NO
NO
NOTE: T
TE: T
TE: T
TE: T
TE: Tap lightl
ap lightl
ap lightl
ap lightl
ap lightly with br
y with br
y with br
y with br
y with braaaaass drift if anchor pin will
ss drift if anchor pin will
ss drift if anchor pin will
ss drift if anchor pin will
ss drift if anchor pin will
no
no
no
no
not push out with finger
t push out with finger
t push out with finger
t push out with finger
t push out with finger.....
5.
5.
5.
5.
5.
Remove brake shoe and place on floor.  Repeat
procedure for opposite shoe.
STANDARD, XL, & XLII SERIES
1.
1.
1.
1.
1.
Insert sturdy lever between end of shoe and spider.
Pry shoe away from  cam until cam rollers can be
removed.  Repeat procedure for opposite shoe.
2.
2.
2.
2.
2.
Unhook shoe return spring by pushing shoes
together, allow tension on spring to be reduced.
3.
3.
3.
3.
3.
Discard shoe return spring and replace with new at
time of reassembly.
4a.
4a.
4a.
4a.
4a. S
SS
SST
T
T
T
TAND
AND
AND
AND
ANDARD & XL
ARD & XL
ARD & XL
ARD & XL
ARD & XL
Remove shoes by rotating the bottom shoe off the
anchor pin to release the tension on the two
retaining springs.
4b.
4b.
4b.
4b.
4b. XLII SERIES
XLII SERIES
XLII SERIES
XLII SERIES
XLII SERIES
Remove snap ring from anchor pin and push anchor
pin through.
5.
5.
5.
5.
5.
Remove the two retaining springs and discard.
6.
6.
6.
6.
6.
Remove shoes from spider.
11
CAMSHAFT REMOVAL
1.
1.
1.
1.
1.
Before removing camshaft check to see if cam bushings
need replacement.  See F
 See F
 See F
 See F
 See Figur
igur
igur
igur
igure 4 on P
e 4 on P
e 4 on P
e 4 on P
e 4 on Page 1
age 1
age 1
age 1
age 12.
2.
2.
2.
2.
2.
2.
2.
2.
2.
Remove spacer from between slack adjuster and cam
shaft bracket.
3.
3.
3.
3.
3.
Grasp camshaft at the camshaft head and pull in the
outward direction to remove.
4.
4.
4.
4.
4.
Clean and inspect camshaft splines and head.
AIR CHAMBER/ CAMSHAFT BRACKET
ASSMEBLY REMOVAL
1.
1.
1.
1.
1.
Remove two nuts and washers that secure brake cham-
ber to camshaft bracket.
2.
2.
2.
2.
2.
Remove brake chamber and temporarily set it aside.
3.
3.
3.
3.
3.
Remove four bracket mounting bolts and lock washers.
4.
4.
4.
4.
4.
Remove bracket assembly from spider.
  CA
  CA
  CA
  CA
  CAUTION: 
UTION: 
UTION: 
UTION: 
UTION: Do no
Do no
Do no
Do no
Do not hammer on slack adjust
t hammer on slack adjust
t hammer on slack adjust
t hammer on slack adjust
t hammer on slack adjuster t
er t
er t
er t
er to
oo
oo
rrrrremo
emo
emo
emo
emovvvvve.  Serious damage t
e.  Serious damage t
e.  Serious damage t
e.  Serious damage t
e.  Serious damage to the slack adjust
o the slack adjust
o the slack adjust
o the slack adjust
o the slack adjuster and/
er and/
er and/
er and/
er and/
or the camshaft spline
or the camshaft spline
or the camshaft spline
or the camshaft spline
or the camshaft splines ma
s ma
s ma
s ma
s may r
y r
y r
y r
y reeeeesult.
sult.
sult.
sult.
sult.
SLACK ADJUSTER REMOVAL
1.
1.
1.
1.
1.
Disconnect clevis from slack adjuster arm by
removing the clevis pin or pins depending on type
of slack adjuster.
2.
2.
2.
2.
2.
Remove retaining ring and shims from splined end
of camshaft.
3.
3.
3.
3.
3.
Remove slack adjuster from the camshaft.
  CA
  CA
  CA
  CA
  CAUTION: 
UTION: 
UTION: 
UTION: 
UTION: Do no
Do no
Do no
Do no
Do not le
t le
t le
t le
t let the air chamber hang b
t the air chamber hang b
t the air chamber hang b
t the air chamber hang b
t the air chamber hang byyyyy
the air line
the air line
the air line
the air line
the air linesssss