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5.11.3 Extended Chassis Frame
General:
• Rear overhang extensions are available as
Regular Production Option.
• Bodies or equipment exceeding the standard
extension length must be supported, please
refer to Figure E74575 low body longitudinal
members or Figure E74576 self-supporting
body structures.
• It is the Body Builder's responsibility to mark-up
the owners' handbook advising the available
payload. Axle plated weights and maximum
allowable axle mass as shown in this manual
must not be exceeded.
• The vehicle should be planned for uniformly
distributed loads.
5.11.4 Non Standard Rear Chassis
Frame Extension
Extensions longer than the standard Regular
Production Option must comply with the following
guidelines:
• The original rear cross member and or
under-run bar or equivalent must be
repositioned at the end of any altered
extension to meet legislation, please refer to
Figure E74578 Non Regular Production Option
rear chassis frame extensions. Also see.
Refer to: 1.17 Towing (page 54).
(Figure E74854)
• The standard fit under-run bar is bolted on as
shown in Figure E74578 and Figure E74854
as mentioned in previous paragraph.
• The altered extension assembly must include
a cross member adjacent to the end of the
original chassis frame to replace the relocated
under-run bar, see Figure E74577.
226
• Flat-beds and low bodies built onto Non
Regular Production Option extensions must
have continuous longitudinal members
engineered by the Body Builder or equipment
supplier (please refer to Figure. E74577) to
resolve the worst case moments at rear bump
stop.
• Extensions should be secured to the chassis
frame sandwiched under the rear spring
shackle bracket utilizing the four (4) bolts and
four (4) holes in the rear of the chassis frame,
totaling eight (8) per vehicle side (please refer
to Figure E74578).
• The four (4) rear most existing holes in the
chassis frame must be sleeved with tubes to
prevent chassis frame collapse, refer to Figure
E74578.
• The spacer tubes should, ideally, be part of a
welded bracket and tube assembly to hold the
tubes accurately in place, avoiding the need
to weld the tubes in place, see Figure E74578.
• Care must be taken when tightening the spring
shackle bracket bolts and nuts to the correct
torque. See
Refer to: 1.15 (page 43).
(tightening torques).
• Extensions sleeved over the outside of the
chassis frame will necessitate the removal of
the under-run bar attachment flanges turned
out at the chassis frame ends. The cut edges
must be protected against corrosion.
Refer to: 5.10 Corrosion Prevention (page 221).
• Drilling of the top flanges turned out is only
permissible rearward of the spring hanger
brackets, for continuity of the altered extension
closing plate, if required. The diameter of the
holes should be 6.0mm maximum.
• If the chassis frame includes the inverted top
hat closure of the 4.25 tonne chassis double
cab variant, a similar closure must be included
in the extension and sleeved over the chassis
frame. It will be necessary to add two (2) holes
and reinforcing tubes in the inverted top hat
chassis frame vertically in line with the group
of four (4) holes see Figure E74578.
FordTransit 2006.5 (April 2006 )
Date of Publication: 12/2006
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