Chevrolet 2004 Blazer Bedienungshandbuch Seite 6

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Section 2 — Frame
Hole drilling, welding, modifications, or alterations to the frame assembly are the responsibility of persons performing these operations.
These same individuals assume complete responsibility for frame assembly reliability, performance after alterations and compliance to
applicable FMVSS requirements.
The following procedures and specific precautionary instructions are recommended for proper installation of special bodies and/or
equipment on GM frames. Failure to follow these recommendations could result in serious damage to the basic vehicle.
Flanges
Do not drill holes in frame flanges.
Holes
Holes to mount brackets, supports, and out-riggers must be drilled in the vertical side rail web with the following restrictions:
Material between edge of hole and inside of upper or lower flange must not be less than 37 mm (1.50 in.) for low carbon steel
(36,000 PSI yield).
The minimum edge distance between any two (2) holes must be larger than twice the diameter of the larger hole.
No holes should exceed 20 mm (0.75 in.) in diameter.
All holes should be drilled in the frame using appropriate drilling practice and safety precautions.
Welding
CAUTION: Fuel tank and fuel lines must be drained and all vapors purged to ensure noncombustible mixture before any welding, brazing
or soldering.
When welding low carbon steel side rails, crossmembers and brackets (32,000 or 36,000 PSI yield strength), emphasis is placed upon weld
application techniques to avoid stress risers that may adversely affect frame operating stresses.
When welding is performed anywhere on the vehicle, precautionary measures should be taken to prevent damage to electrical system wiring
or components. Prior to any welding, parts or components which could be damaged by excessive temperatures must be removed or
adequately shielded; the battery cables should be disconnected at the battery. Also prior to welding, the area to be welded and surrounding
area must be cleaned of all frame protective coating. After welding, when parts are cool, carefully inspect wiring and electrical components
S/T SMALL UTILITY – SUV
(
C
HEVY BLAZER & GMC JIMMY
)
S/T Small Utility – SUV 2004
3
PAGE
(Section 2 — continued on next page)
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