Peterbilt Medium Duty Trucks Operator's Manual after 1-07

Frame and Fifth Wheel
Introduction
FRAME AND FIFTH WHEEL
WARNING! Do not cut or splice frame rails or
drill through the top or bottom flanges. These
operations could affect frame rail strength leading
to a failure resulting in serious personal
injury and/or an accident. Always leave frame
repairs to your Peterbilt Dealer.
Engine Painting
• Do not electrostatically paint electronically controlled
engines or vehicles with these engines.
Welding
• Observe these recommended procedures to protect
electronic systems during welding operations.
Engines
Before welding on vehicles equipped with electronic engines,
the following precautions should be observed:
Preventive Maintenance
NOTE: Welding to frame rail may void frame rail warranty.
• Disconnect all electronic connections to the vehicle batteries.
• Remove battery power cable and insulate it from the
vehicle.
• Disconnect all Electronic Control Module (ECM) connectors
(on electronic engines).
• Do not use the ECM or engine ground stud for the
ground of the welding probe.
• Ensure that the ground connection for the welder is as
close to the weld point as possible. This ensures maximum
weld current and minimum risk to damage of electrical
components on the vehicle.
• Turn engine OFF.
All Anti–Lock Braking Systems (ABS)
• Before welding anywhere on the vehicle, detach the ABS
Electronic Control Unit (ECU) connector and all other
electronic control units.
– 218 – Y53-6008 Medium Duty (R10/06)