Paccar Kenworth T170 Hybrid 2011, Руководство строителя

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Section 7
Frame Modifications
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When mounting a body to the chassis, DO NOT drill holes in the upper or
lower flange of the frame rail. If the frame rail flanges are modified or dam -
aged, the rail could fail prematurely and cause an accident. Mount the body
using body mounting brackets or U–bolts.
Do not drill new holes any closer than 2 inches (50 mm) to existing holes.
Frame drilling affects the strength of the rails and if not done properly can
cause the frame rails to fail and cause an accident.
An appropriately sized bolt and nut must be installed and torqued properly in
all unused frame holes. Failure to do so could result in frame crack initiation
around the hole.
Use care when drilling the frame web so the wires and air lines routed inside
the rail are not damaged. Failure to do so could lead to equipment damage
and cause an inoperable electrical or air system circuit.
Never use a torch to make holes in the rail. Use the appropriate diameter drill
bit. Heat from a torch will affect the material properties of the frame rail and
could result in frame rail cracks.
Hole diameter should not exceed the bolt diameter by more than .060 inches
(1.5 mm). Oversized holes could result in excessive frame wear around the hole.
FRAME MODIFICATIONS
Introduction
The T170/T270/T370 offers multiple wheelbase configurations from the factory. So, in most cases frame modifications to
produce a particular wheelbase should not be necessary .
.
Location and Hole Pattern
DRILLING RAILS
If holes need to be drilled to attach anything to the rail, see SECTION 6 “BODY MOUNTING” for more information . Follow
the general spacing and hole location guidelines on Page 6–4, Figure 6–7 .
Hole pattern dimensions for crossmember designs are illustrated in Page 6–5, Figure 6–8 .
Hole diameter should not exceed the bolt diameter by more than .060 inches (1 .5 mm) .
However, some installations may require slight modifications, while other installations will require extensive modifications.
For example an existing dealer stock chassis may need to have the wheelbase changed to better fit a customer’s applica
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tion. The modifications may be as simple as shortening or lengthening the frame cutoff, or they may be as complex as
changing the wheelbase .
WARNING:
WARNING:
CAUTION:
CAUTION:
CAUTION:
CAUTION: