Hudson 480-490 Series Service Manual page 68

62 BODY MANUAL
BODY ALIGNING AND
TRAMMING
MEASURING:
The measurements required for squaring up operations are
vertical, diagonal, and horizontal, Figure 93. The measure-
ments taken on one side of the body should check with the
measurements taken between identical points on the oppo-
site side of the body.
When differences are found in each of the vertical, diago-
nal, and horizontal measurements in the relation of one
side of the body to the other between identical points, the
exact position of any misalignment is readily indicated. It
can then be easily determined in what position the body
jack or jacks should be placed to produce the proper
results. All measurements may be taken and checked with
a body checking tram. The tram
FIGURE 93
is of telescopic construction that permits adjustment to the
desired length. A convenient thumb screw is used to lock
the tram exactly on the marks and in the position at which
the first or opposite ,measurement was taken.
VERTICAL MEASUREMENTS:
Vertical measurements should be made first, Figure 94.
They are taken from the top of the body floor at the sill
upward the same distance on each of the front, center, and
rear quarter panel body pillars -- on both sides of the body.
Chalk should be used to mark the sill and the body pillars
at the exact points where the measurements were taken.
Depending on the type and location of the damage, it may
be found practical to make two or three measurements on
each body pillar. These additional marks and measure-
ments will greatly assist in checking the correct contour of
the pillars and in taking horizontal and diagonal measurements.