2010 Kenworth T440/T470 Body Builder Manual

Section 7
Frame Modifications
When reducing the wheelbase, we recommend that the suspension be moved forward and relocated on the original rail.
The rail behind the suspension can then be cut to achieve the desired frame cutoff. See Figure 7–3.
WARNING!
Do not drill new holes any closer than 2 inches (50 mm) to existing holes. Frame drilling
affects the strength of the rails. Failure to comply may result in personal injury, death,
equipment or property damage.
Before the rear suspension is relocated, check the new location of the spring hanger brackets. The new holes for the
spring hanger brackets must not overlap existing holes and should not come any closer than 2 inches (50 mm) to existing
holes.
Mount the suspension Brackets On the
Original Rail (see frame insert section &
Figures 7-1 and 7-2)
Extended Wheelbase
Do Not Mount the
Suspension Bracket
On the Added
Frame Rail
Original Wheelbase
Relocated Rear
Suspension
Shortened Wheelbase
Cut Frame at Rear to
Obtain Desired Cutoff
FIGURE 7-3. Comparison of Original, Shortened, and Extended Wheelbases.
12/09
7-4