Paccar Kenworth T800 2012, Manual

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6-5
08/12
Section 6
Body Mounting
Frame Sill
If the body is mounted to the frame with brackets, we recommend that the frame sill spacer be made from a strip of rub -
ber or plastic (delrin or nylon). These materials will not undergo large dimensional changes during periods of high or low
humidity. The strip will be less likely to fall out during extreme relative motion between body and chassis. See Figure 6–7.
FIGURE 6-7.
Spacer Between Frame Sill and Body Rail - Rubber or Plastic
Brackets
When mounting a body to the chassis with brackets, we recommend designs that offer limited amount of relative move -
ment, bolted securely but not too rigid. Brackets should allow for slight movement between the body and the chassis. For
instance, Figure 6–8 shows a high compression spring between the bolt and the bracket.
FIGURE 6-8.
High Compression Spring
FIGURE 6-9.
Rubber Spacer Between Brackets
Between the Mounting Bolt and Upper Bracket
Another possibility is mounting a rubber spacer between the brackets. See Figure 6–9.
These designs will allow relative movement between the body and the chassis during extreme frame racking situations.
Extreme frame racking, and mountings that are too rigid, could cause damage to the body. This is particularly true with
tanker installations.
Body Subframe
(Rail)
Chassis Frame
(Rail) Sill
Spacer
Spring
Rubber Spacer