Paccar Kenworth T170 2011, Руководство строителя

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Section 7
Frame Modifications
7-4
12//11
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.
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.
Original Wheelbase
Extended Wheelbase
Shortened Wheelbase
Cut Frame at Rear to
Obtain Desired Cutoff
Do Not Mount the
Suspension Bracket
On the Added
Frame Rail
Mount the suspension Brackets On the
Original Rail (see frame insert section &
figures 7-1 & 7-2)
Relocated Rear
Suspension
FIGURE 7-3. Comparison of Original, Shortened, and Extended Wheelbases
Crossmembers
After changing a wheelbase, an additional crossmember may be required to maintain the original frame strength .
The maximum allowable distance between adjacent crossmembers is 60 inches (1524 mm) . If the distance between
adjacent crossmembers exceeds this dimension, add a crossmember between them . See Figure 7–4 .
Before Wheelbase is Lengthened
Less Than 60”
Greater Than 60”
Additional Crossmember
FIGURE 7- 4.
Crossmember Added when Distance Exceeds 60 inches (1524 mm)
WARNING: