Section 6
Frame Modiļ¬cations
CROSSMEMBERS
After lengthening a wheelbase, an additional crossmember may be required to maintain the original frame strength.
Contact Dealer for crossmember locations.
The maximum allowable distance between the forward suspension crossmember and the next crossmember forward is
47.2 inches (1200 mm). If the distance exceeds 47.2 inches (1200 mm) after the wheelbase is lengthened, add a
crossmember between them. See Figure 3-6.2 on page 3-14 for crossmember hole patterns.
FIGURE 6-2. Crossmember Spacing Requirements FRAME MODIFICATIONS Peterbilt Motors Company 6-2
Figure 6-1 Crossmember Added When Distance Exceeds 60 Inches (1524 mm)
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