Inspection of parts (continued) – Bendix Commercial Vehicle Systems 16 1/2 SCAM/XTRA LIFE SERV MANUAL User Manual
Page 16
INSPECTION OF PARTS (CONTINUED)
14
FFFFFigur
igur
igur
igur
igure 1
e 1
e 1
e 1
e 10
0
0
0
0
TRANSIT BRAKE (CAST SHOE ONLY) DRUM/
LINING CROSS REFERENCE CHART
1.
1.
1.
1.
1.
When installing new drums always use standard
thickness lining. If used drums are rebored care-
fully measure inside diameter (in several places) of
rebored drum.
LINING MAXIMUM THICKNESS (IN)
DRUM DIA. (IN) AT RELINE
.867” (Standard Thickness)
.927” (1X Oversize)
.987” (Premium Thickness)
16.500”- New
16.620”
Over 16.620”
CA
CA
CA
CA
CAUTION:
UTION:
UTION:
UTION:
UTION: Ne
Ne
Ne
Ne
Nevvvvver shim br
er shim br
er shim br
er shim br
er shim brak
ak
ak
ak
ake linings. See page
e linings. See page
e linings. See page
e linings. See page
e linings. See page
2
2
2
2
21, R
1, R
1, R
1, R
1, Reline Pr
eline Pr
eline Pr
eline Pr
eline Procedur
ocedur
ocedur
ocedur
ocedure, for mor
e, for mor
e, for mor
e, for mor
e, for more de
e de
e de
e de
e detttttail.
ail.
ail.
ail.
ail.
2.
2.
2.
2.
2.
Refer to the chart below for proper oversized lining
required based on drum measurements.
SHOES AND LINING
CAST SHOE TYPE
1.
1.
1.
1.
1.
Check shoes for cracks and elongated bolt holes.
2.
2.
2.
2.
2.
Measure the shoe span by loosely installing the
anchor pin and cam roller in the appropriate ends
of the shoe rib. If the distance from center of
anchor pin to center of cam roller exceeds 12.76
inches replace shoe.
3.
3.
3.
3.
3.
Check linings, replace when any of the following
conditions exist.
A. Total lining thickness at thinnest point is .31” or
less than 1/16” above screw head. Also, if the
material is worn beyond the wear groove on the
side of the lining.
B.
B.
B.
B.
B.
Linings are cracked or worn in an unusual or
odd pattern. For example: lining wear tapered
from side to side across the shoe table. Un
usual wear pattern can indicate damage to
foundation brake parts.
C.
C.
C.
C.
C.
Screw holes are elongated.
D.
D.
D.
D.
D.
Lining is oil soaked.
E.
E.
E.
E.
E.
Lining can be moved by hand. (loose bolts)
CA
CA
CA
CA
CAUTION:
UTION:
UTION:
UTION:
UTION: Drums displa
Drums displa
Drums displa
Drums displa
Drums displaying hea
ying hea
ying hea
ying hea
ying heat checks with
t checks with
t checks with
t checks with
t checks with
a contin
a contin
a contin
a contin
a continuous length of four inche
uous length of four inche
uous length of four inche
uous length of four inche
uous length of four inches or mor
s or mor
s or mor
s or mor
s or more and
e and
e and
e and
e and
eeeeext
xt
xt
xt
xtend ar
end ar
end ar
end ar
end around the edge of the drum should be
ound the edge of the drum should be
ound the edge of the drum should be
ound the edge of the drum should be
ound the edge of the drum should be
rrrrreplaced.
eplaced.
eplaced.
eplaced.
eplaced. See F
See F
See F
See F
See Figur
igur
igur
igur
igure 1
e 1
e 1
e 1
e 10.
0.
0.
0.
0.
BRAKE DRUMS
1.
1.
1.
1.
1.
Inspect drums for cracks, heat checking, glazing,
grooving, severe out-of-round condition or bell
mouthing m
m
m
m
must no
ust no
ust no
ust no
ust not e
t e
t e
t e
t exxxxxceed .0
ceed .0
ceed .0
ceed .0
ceed .02
2
2
2
25 T
5 T
5 T
5 T
5 T.I.R. (T
.I.R. (T
.I.R. (T
.I.R. (T
.I.R. (To
oo
ootttttal
al
al
al
al
Indica
Indica
Indica
Indica
Indicatttttor R
or R
or R
or R
or Reading)
eading)
eading)
eading)
eading) Replace any drums that are
cracked. The drum should not be used if it exceeds
the manufacturer’s recommended maximum
diameter stamped on the drum.
2.
2.
2.
2.
2.
Measure the drum I.D. to be sure the maximum limit
allowed (stamped on drum) has not been exceeded
due to wear or machining.
CAUTION: Maximum discard
diameter is 16.750”