BENDIX BW7274 User Manual
21
RELINE PROCEDURE
The installation should be checked by attempting to
insert a .006" feeler gage between the lining and shoe
table. It should not be possible to insert the feeler gage
anywhere along the edge. See F
insert a .006" feeler gage between the lining and shoe
table. It should not be possible to insert the feeler gage
anywhere along the edge. See F
See F
See F
See F
See Figur
igur
igur
igur
igure 1
e 1
e 1
e 1
e 16.
6.
6.
6.
6. The only
exception is at each end and beyond the last row of
rivets/bolts. A slightly larger clearance may exist in
these areas.
rivets/bolts. A slightly larger clearance may exist in
these areas.
Riveting Application
Some brake failures result from the use of rivets which
are too short, too long, or the wrong diameter. Incor-
rect setting of the riveting machine may induce other
types of failures.
are too short, too long, or the wrong diameter. Incor-
rect setting of the riveting machine may induce other
types of failures.
The solid portion of the rivet should end just at the
inner surface of the shoe. The hollow portion of the
rivet should extend past the inner surface of the shoe.
The proper size rivet must be used to completely fill the
hole.
inner surface of the shoe. The hollow portion of the
rivet should extend past the inner surface of the shoe.
The proper size rivet must be used to completely fill the
hole.
USE ONL
USE ONL
USE ONL
USE ONL
USE ONLY 1
Y 1
Y 1
Y 1
Y 10-8
0-8
0-8
0-8
0-8
1/2
1/2
1/2
1/2
1/2
RIVETS
RIVETS
RIVETS
RIVETS
RIVETS
Brass plated steel rivets are recommened. The riveting
machine must be adjusted so that the roll of the rivet is
complete, but the rivet should not split. Always use a
roll set, never a star set, when riveting brake linings. A
star set does not compress the rivet and expand it to fill
the hole. Consequently, the lining may work loose in
service.
machine must be adjusted so that the roll of the rivet is
complete, but the rivet should not split. Always use a
roll set, never a star set, when riveting brake linings. A
star set does not compress the rivet and expand it to fill
the hole. Consequently, the lining may work loose in
service.
Bolts/Rivets Removal
When removing bolts/rivets from the brake shoes, be
careful to avoid doing any damage to the holes in the
shoe. Do not use a chisel to shear them off. The force
will elongate the bolt/rivet holes. Neglecting any
elongated holes may result in a loose fitting installation.
If holes are burred, they should be filed down flush with
the shoe table.
careful to avoid doing any damage to the holes in the
shoe. Do not use a chisel to shear them off. The force
will elongate the bolt/rivet holes. Neglecting any
elongated holes may result in a loose fitting installation.
If holes are burred, they should be filed down flush with
the shoe table.
Cleaning the Shoe
Rust often developes on the surface of the shoe table
under the brake lining or blocks. During every reline job,
shoe tables should be cleaned thoroughly. The best
procedure is to steam clean the entire shoe or put it into
a degreaser.
under the brake lining or blocks. During every reline job,
shoe tables should be cleaned thoroughly. The best
procedure is to steam clean the entire shoe or put it into
a degreaser.
After cleaning the shoe, the shoe should be scraped
clean of rust and scale. Any burrs or nicks should be
filed smooth. At the same time, the entire shoe should
be examined to see if it is worn or bent.
clean of rust and scale. Any burrs or nicks should be
filed smooth. At the same time, the entire shoe should
be examined to see if it is worn or bent.
Shoe Inspection
The shoe should be either reconditioned or discarded.
It is also necessary to check for flat spots on the shoe
that can be caused by cleaning away the rust from the
area that was under the block previously. This can cause
a mismatch of shoe and lining arcs. After the shoe is
cleaned and inspected, it should be given a coating of
rust preventative paint. Treatment of a new, unpainted
shoe is also suggested to prevent the initial rusting
problem.
It is also necessary to check for flat spots on the shoe
that can be caused by cleaning away the rust from the
area that was under the block previously. This can cause
a mismatch of shoe and lining arcs. After the shoe is
cleaned and inspected, it should be given a coating of
rust preventative paint. Treatment of a new, unpainted
shoe is also suggested to prevent the initial rusting
problem.
Lining Installation
IMPOR
IMPOR
IMPOR
IMPOR
IMPORT
T
T
T
TANT
ANT
ANT
ANT
ANT: Ne
: Ne
: Ne
: Ne
: Nevvvvver shim the br
er shim the br
er shim the br
er shim the br
er shim the brak
ak
ak
ak
ake linings.
e linings.
e linings.
e linings.
e linings. Brake
noise may result because of cracked and/or loose lining
since a tight installation is not possible with shims. The
inside surface of the correct arc to match the shoe table,
and the rivet/bolt holes in the linings will only line up
with holes in the shoes when they are in direct contact.
Prior to riveting/bolting be sure the holes in the lining
blocks and the shoes are exactly matched.
since a tight installation is not possible with shims. The
inside surface of the correct arc to match the shoe table,
and the rivet/bolt holes in the linings will only line up
with holes in the shoes when they are in direct contact.
Prior to riveting/bolting be sure the holes in the lining
blocks and the shoes are exactly matched.
The sequence of riveting/bolting should be such that
the center of the block is attached first and then the
ends. See page 2
the center of the block is attached first and then the
ends. See page 2
See page 2
See page 2
See page 2
See page 22 for bolting sequence.
2 for bolting sequence.
2 for bolting sequence.
2 for bolting sequence.
2 for bolting sequence.
FFFFFigur
igur
igur
igur
igure 1
e 1
e 1
e 1
e 16
6
6
6
6