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FRAME AND BODY MOUNTS
2A-1
SECTION 2A
FRAME AND BODY MOUNTS
CONTENTS OF THIS SECTION
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General Description
Frame
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Identification
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On Car Service
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Frame Inspection
Underbody Inspection
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Frame Repair
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Frame Alignment
Tramming Sequence
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Frame Dimensions
Body Mounts
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Frame Braces
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GENERAL DESCRIPTION
FRAME
Frames used on A, B and G Series are full frames and
are basically the same, consisting of full length right and left
side members joined laterally by crossmembers. Several
different frames are used in each line to meet the various
vehicle size and function requirements but the basic shape for
each line remains the same. Differences between frames in a
given line exists only in metal gauge, part size and numbers
of parts necessary to meet the particular structural
requirements of the models involved.
The H Series body is of unitized construction with
integral front and rear frame side rails supporting the front
end sheet metal, front and rear suspension systems and other
mechanical components.
The F and X Series bodies are unitized construction but
in addition, have a stub frame which supports the front end
sheet metal, front suspension, engine and other mechanical
components. Unitized construction demands that underbody
components be properly aligned to assure correct suspension
location. In the event of collision damage, it is important that
the underbody be thoroughly checked, and, if necessary,
realigned in order to accurately establish proper dimensions.
Since each individual underbody component contributes
directly to the overall strength of the body, it is essential that
proper welding, sealing and rust-proofing techniques be
observed during service operations. The underbody
components should be rust-proofed whenever body repair
operations which destroy or damage the original rust-
proofing are completed. When rust-proofing critical
underbody components, it is essential that a good quality type
of air dry primer be used (such as corrosion resistant zinc
chromate). It is not advisable to use combination type primer-
surfacers. There are many classifications of tools that may be
employed to correct the average collision damage situation
including frame straightening machines, lighter external
pulling equipment and standard body jacks.
FRAME IDENTIFICATION
Frame identification tags are attached to one of the two
locations shown in Fig. 2A-1.
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