Peterbilt 325 2017, Operator'S Manual

Page: 320 / 392

FRAME
FRAME
Introduction
WARNING!
Do not cut, splice or weld frame
rails or drill through the top or bot-
tom flanges of the rails.
These
operations could affect frame rail
strength leading to a failure resulting
in an accident.
Rail failures re-
sulting from such modifications are
not warrantable. Failure to comply
may result in death, personal injury,
equipment or property damage.
Emergency Welding
WARNING!
Frame welding is NOT recom-
mended. The high heat of welding
nullifies the special heat treatment
of the rails, greatly reducing the ten-
sile strength of the frame rail. If a
frame member becomes cracked
from overloading, fatigue, surface
damage or a collision, the only
permanent repair is to replace the
damaged frame member with a new
part.
In an emergency, a temporary repair
may be performed. Observe the
following precautions to protect
electronic systems during welding
operations. Emergency welding
procedures are further explained in the
maintenance manuals. Please refer to
the ordering information on the back
cover to obtain a maintenance manual.
Welding Precautions
In the event of emergency welding of a
frame rail and when welding any other
part of your truck or any component
attached to your truck, observe the
following precautions before welding:
•
Disconnect all electronic devices.
It is not possible to list all of the
electronics that could be affected,
but a few examples include the
following: alternator, engine
Electronic Control Unit (ECU),
transmission ECU, ABS ECU,
navigation devices, diagnostic
devices, and monitoring devices.
•
Disconnect battery cables and
insulate them from the vehicle.
•
Do not use the ECU or engine
ground stud for the ground of the
welding probe.
•
Ensure that the ground connection
for the welder is as close to the
5-110
Y53-6060-1C1 (03/17)
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