Chevrolet 30 Series 1967 Service Manual page 119

General Description 10-60 Series T r u c k ........................
Frame Alignm ent...............................................................
Horizontal C h e c k ............................................................
Vertical C h e c k ...............................................................
Light duty 10-30 Series frames are of the ladder
channel section riveted type. Heavy duty 40-60 Series
frames are of channel section design.
Figures 1 and 2 illustrate typical light and heavy duty
frames with crossmembers, body mounts and suspension
attaching brackets. This section also included general
instructions for checking frame alignment and recom­
mendations on frame repair.
FRAME ALIGNMENT
Horizontal frame checking can be made with tram­
ming gauges applied directly to the frame or by trans­
ferring selected points of measurement from the frame
to the floor by means of a plum bob and using the floor
layout for measuring. Figure 3 may be used as a gen­
eral guide in the selection of checking points; however,
selection of these points is arbitrary depending on ac­
cessibility and convenience.
member is that for each point selected on one side of the
frame, a corresponding point on the opposite side of the
frame must be used for vertical checks, opposite and
alternate sides for horizontal checks.
Fig. 1-10-30 Series Frame—Typical
SECTION 2
FRAME
INDEX
Page
2-1
2-1
2-2
2-2
GENERAL DESCRIPTION
An important point to r e ­
Frame R epair.....................................................................
W e ld in g ...........................................................................
Bolting..............................................................................
Frame Dimensions Drawings and Charts . . .
General Description - Chevy V a n ....................................
Underbody Alignment.........................................................
Vehicle Preparation
Points to remember when preparing vehicle for frame
checking:
1. Place vehicle on a level surface.
2. Inspect damaged areas for obvious frame misalign­
ment to eliminate unnecessary measuring.
3. Support vehicle so that frame sidemembers are
parallel to the ground.
Tramming Sequence
1. Dimensions to bolts and/or holes in frame extend to
dead center of the hole or bolt.
2. Dimensions must be within 3/16".
3. If a tram bar is used, for horizontal alignment
- check from opposite and alternate reference points
AA, BB and CC, as illustrated by the lines in Fig­
ure 3. Error will result if a tram bar is not level
and centered at the reference points.
4. Obtain vertical dimensions and compare the differ­
ences between these dimensions with the dimensions
as shown in chart.
Fig. 2-50-60 Series Frame—Typical
Page
2-2
2-2
2-2
2-3 through 2-8
2-9
2-10
" X "
CHEVROLET TRUCK SERVICE MANUAL