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BENDIX BW7274 User Manual

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AIR CHAMBER BRACKET ASSEMBLY
INSPECTION OF PARTS
SPIDER REMOVAL
1.
1.
1.
1.
1.
Mark the postion of the spider on the axle (L.H. or
R.H.) and the orientation on the axle flange by
making a reference mark on the spider and flange.
See F
See F
See F
See F
See Figur
igur
igur
igur
igure 4.
e 4.
e 4.
e 4.
e 4.
2.  
2.  
2.  
2.  
2.  Remove the spider to axle mounting bolts.
3.  
3.  
3.  
3.  
3.  Remove spider.
DUST SHIELD REMOVAL
1.
1.
1.
1.
1.
Mark dust shields (upper left, lower right, etc-
prior to removal.
2.
2.
2.
2.
2.
Detach dust sheild by removing the six cap screws
using a 9/16" socket.  Do not remove dust shield
unless there is apparent damage.
BRAKE DISASSEMBLY (CONTINUED)
FFFFFigur
igur
igur
igur
igure 4
e 4
e 4
e 4
e 4
1.
1.
1.
1.
1.
Check assembly for bent chamber bracket, broken
welds, cracks, and correct alignment.
2.
2.
2.
2.
2.
Inspect camshaft bushings for signs of wear.
Bearing surfaces should be smooth and free of any
pitting or fractures.  Insert camshaft and measure
looseness up and down side to side at both ends
with a dial indicator.  If more than .030” movement,
replace bushings and/or camshaft.  See F
See F
See F
See F
See Figur
igur
igur
igur
igure 5.
e 5.
e 5.
e 5.
e 5.
NO
NO
NO
NO
NOTE: If it is de
TE: If it is de
TE: If it is de
TE: If it is de
TE: If it is detttttermined tha
ermined tha
ermined tha
ermined tha
ermined that a bushing r
t a bushing r
t a bushing r
t a bushing r
t a bushing requir
equir
equir
equir
equireeeeesssss
rrrrreplacement, bo
eplacement, bo
eplacement, bo
eplacement, bo
eplacement, both camshaft bushings and seals
th camshaft bushings and seals
th camshaft bushings and seals
th camshaft bushings and seals
th camshaft bushings and seals
should be r
should be r
should be r
should be r
should be replaced.  All CAS
eplaced.  All CAS
eplaced.  All CAS
eplaced.  All CAS
eplaced.  All CAST SHOE and P SERIES
T SHOE and P SERIES
T SHOE and P SERIES
T SHOE and P SERIES
T SHOE and P SERIES
br
br
br
br
brak
ak
ak
ak
akeeeees ha
s ha
s ha
s ha
s havvvvve br
e br
e br
e br
e bronze cam bushings.  The S
onze cam bushings.  The S
onze cam bushings.  The S
onze cam bushings.  The S
onze cam bushings.  The ST
T
T
T
TAND
AND
AND
AND
ANDARD,
ARD,
ARD,
ARD,
ARD,
XL, and XLII SERIES br
XL, and XLII SERIES br
XL, and XLII SERIES br
XL, and XLII SERIES br
XL, and XLII SERIES brak
ak
ak
ak
akeeeees use n
s use n
s use n
s use n
s use nylon bushings with
ylon bushings with
ylon bushings with
ylon bushings with
ylon bushings with
the br
the br
the br
the br
the bronze bushing a
onze bushing a
onze bushing a
onze bushing a
onze bushing as an op
s an op
s an op
s an op
s an option.
tion.
tion.
tion.
tion.
CAMSHAFT
1.
1.
1.
1.
1.
Inspect camshaft spline and body for chips and
excessive deformation. Replace as necessary.
See F
See F
See F
See F
See Figur
igur
igur
igur
igure 6.
e 6.
e 6.
e 6.
e 6.
2.
2.
2.
2.
2.
Inspect cam head for cracks, and its roller surfaces
for flat spots, brinneling, or ridges.
NO
NO
NO
NO
NOTE: Un
TE: Un
TE: Un
TE: Un
TE: Unusual w
usual w
usual w
usual w
usual wear pa
ear pa
ear pa
ear pa
ear patttttttttterns which ma
erns which ma
erns which ma
erns which ma
erns which may indica
y indica
y indica
y indica
y indicattttte an
e an
e an
e an
e an
out
out
out
out
out-of-squar
-of-squar
-of-squar
-of-squar
-of-square condition. R
e condition. R
e condition. R
e condition. R
e condition. Replace damaged cam-
eplace damaged cam-
eplace damaged cam-
eplace damaged cam-
eplace damaged cam-
shaft
shaft
shaft
shaft
shafts.
s.
s.
s.
s.
FFFFFigur
igur
igur
igur
igure 5
e 5
e 5
e 5
e 5
FFFFFigur
igur
igur
igur
igure 6
e 6
e 6
e 6
e 6
12