a s possible without changing the centers on the
d. Check the distance from a straightedge placed
over the spindle ends to the tandem mounting bracket
Using equipment of adequate capacity, re
Compare this distance
move the entire tandem
axle assembly being
with a corresponding distance on the opposite side.
s e r v i c e d . Proceed as follows:
M o v e the axle in the cast retainer saddle to get
these dimensions equal.
a. Record the distance from the top of the axle
to the top of the cam, and whether the cam is to the
e. Check the new axle for bend as shown else
front or rear.
where in this section. If bend is over 1/64 in. (.397
mm) as shown in the procedure, rotate the axle very
b. Remove wheels, drums and foundation brakes.
slightly and check again. If the bend dimension be
comes greater, t r y rotating the axle the opposite
c, Remove the nuts and rubber bushings retain-
d i r e c t i o n . When the axle falls under the 1/64 in.
ing the axle on the walking beams.
(.397 mm) maximum bend, mark the axle in some way
t o k e e p t h i s p o s i t i o n . Check the cam location to
e n s u r e that it will be close to being the same as
d. Remove the axle.
that on the axle being replaced.
10-32. INSTALLING AXLES.
a. Set the tandem brackets at the same centers
spindle of one axle to the center of the other. Check
as the brackets welded to the trailer frame.
I f these distances are not equal (R1=L1), place a
b. Install new cast retainer brackets on the ends
wedge between the axle and saddle to get them the
of the walking beams with an axle seated, but not
w e l d e d , in the saddle of the brackets (see figure
g. Check dimensions across corners. Locate the
T h e camber marks should be located on
top center of the axle at 2 in. (50.8 mm) in from the
top of the axle during this procedure.
1011 for camber mark location.
Be very accurate as this dimension is critical. Make
this mark at four (4) locations. Measure the distance
Square the undercarriage. The existing axle
between marks diagonally across the tandem. The
should be squared with the walking beams as closely
two diagonal measurements (A & B) should be equal.
If not, adjust the new axle in its seat as required
FIGURE 10-11. AXLE CAMBER MARK.
FUGURE 10-10. AXLE SEATED IN CAST