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 (a above).
Note. The key letters shown in parentheses in d and e below
are in figure 52.
d.
Removal
of
Brake
Drum
from
Hub
(Semitrailer
M270A1).
Remove
ten
hex-head
bolts
(B),
lockwashers
(E),
and,
hex
nuts
(F)
that
secure
brake
drum
(J)
and
inspection
hole
cover
(D)
to
adapter
(C).
Remove
inspection
hole
cover.
Remove
brake
drum
from
adapter.
Remove
ten
wheel
studs
(A)
that
secure
adapter
to
hub
(G).
Studs
have
serrated
shank causing them to be retained in adapter and hub unless
forced out. Press or drive out studs then separate adapter from
hub.
e. Installation
of
Brake
Drum
on
Hub
(Semitrailer
M270A1)
Position
adapter
(C)
on
hub
(G)
and
secure
with
(fig. 52).
ten wheel studs (A).
Use care in replacing studs by matching
serrations in studs with serrations in brake drum adapter and
hub
to
preserve
good
fit.
Position
brake
drum
(J)
on
brake
drum
adapter
and
inspection
hole
cover
(D)
on
drum
and
adapter.
Secure
cover
and
brake
drum
with
ten
7/16
x
1
hex-head
bolts
(B),
7/16-inch
lockwasher
(E),
and
7/16-inch
hex nuts (F).
f.
Removal
of
Brake
Drum
from
Hub
(Semitrailers
M270
and
M269).
Remove ten hex-head bolts, lockwashers, and hex
nuts
that
secure
drum,
inspection hole cover, and oil slinger
Remove inspection hole cover from
to brake drum adapter.
drum and separate drum and oil slinger from adapter. Re-
move ten hex-head bolts and lockwashers that secure adapter
to hub. Remove adapter from hub. Ten wheel studs extending
from
flange
of
hub
have
serrated
shanks
causing
them
to
be
retained in
hub,
unless
forced
out.
If
damaged,
press
or
tap
out studs.
g.
Installation of Brake Drum on Hub (Semitrailers M270
M269). If wheel studs were removed from flange of hub,
and
install
new
studs.
Use
care
in
replacing
studs
by
serrations in studs with serrations in flange of hub to preserve
good fit. Position adapter on flange of hub and secure adapter
with
ten
x
1
hex-head
bolts
and
ten
-inch
lockwashers.
Slip brake drum over hub and against outer surface of flange
of adapter. Apply a thin coating of Permatex No. 1 to flange
of oil slinger. From a position inside drum, position oil slinger,
concave side toward hub, on inner surface of flange of adapter.
secure drum and oil slinger to adapter with nine 7/16 x 1,
hex-head
bolts,
nine
7/16-inch
lockwashers,
and
nine
7/16-inch
hex
nuts.
Position
inspection
hole
cover
over
inspection
hole
TAGO 1321B
85
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