2010 Kenworth T440/T470 Body Builder Manual

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 rubber
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 6–3.
Body Subframe
(Rail)
Chassis Frame
(Rail) Sill
Spacer
FIGURE 6-3. 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 movement,
bolted securely but not too rigid. Brackets should allow for slight movement between the body and the chassis. For
instance, Figure 6–4 shows a high compression spring between the bolt and the bracket.
Spring
Rubber Spacer
FIGURE 6-4. High Compression Spring
Between the Mounting Bolt and Upper Bracket
FIGURE 6-5. Rubber Spacer Between Brackets
Another possibility is mounting a rubber spacer between the brackets. See Figure 6–5.
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.
12/09
6-4