page 18
TD-24-T (5+20)
®
Maintenance
2.3
Rear Impact Guard (RIG)
Your trailer may be fitted with an energy absorbing RIG system that retracts auto-
matically when the deck is tilted for loading and unloading. An elastomeric torsion
block assembly is part of the system and absorbs the excess travel of the retraction
hardware. Normally the RIG requires no maintenance other than checking for loose
fasteners or missing cotter pins.
In the event of a rear impact to the trailer, check the RIG system thoroughly for bent
or damaged components. There are two sacrificial elements in the system called crush
blocks that are intended to deform while absorbing the forces of an impact. If they show
any signs of deformity from having been impacted by the RIG pivot arms, they should
be replaced immediately. In no case should the crush blocks be ‘straightened’ or re-
paired in any way; they both must be REPLACED if deformed by the RIG pivot arms.
Also check the deck beam flanges that the crush blocks bolt to for damage or bending.
The flanges may have to be straightened if the impact was particularly severe.
Other areas to check include cracked welds, damaged lighting or electrical har-
ness, bent hinge tube or hinge pin, bent retraction push rod, and bent or broken pivot
pins and fasteners. If, after impact, the RIG does not hang normally from the trailer
deck and no other damage can be found, it is possible that the torsion block assembly
has been overstressed and should be inspected and replaced if necessary.
As a last check, tilt the deck while observing the RIG and make sure that it retracts
and extends normally.
Summary of Contents for TD-24-T(5+20)
Page 9: ...page 9 TD 24 T 5 20 Operation Spring Brake Chamber Rubber Seal Caging Key...
Page 59: ...page 59 TD 24 T 5 20 2 6 7 11 8 3 9 10 5 4 12 13 14 16 15 1 Parts P A R T S...
Page 61: ...page 61 TD 24 T 5 20 4 5 6 8 7 16 15 14 13 11 9 12 10 Parts P A R T S 3 2 1...
Page 63: ...page 63 TD 24 T 5 20 9 12 10 13 5 7 6 3 4 3 1 6 8 7 17 2 11 16 15 14 Parts P A R T S...
Page 67: ...page 67 TD 24 T 5 20 Parts P A R T S THIS PAGE LEFT BLANK INTENTIONALLY...
Page 69: ...page 69 TD 24 T 5 20 Parts P A R T S 5 6 6 7 8 9 10 12 11 4 3 1 2...
Page 71: ...page 71 TD 24 T 5 20 Junction Box shown for reference only Parts P A R T S 4 1 3 2 6 5...
Page 75: ...page 75 TD 24 T 5 20 Parts Detail shown on follow ing pages P A R T S 4 7 5 6 2 1 3 3...
Page 77: ...page 77 TD 24 T 5 20 Parts Hidden between ECU and tank P A R T S 15 5 15 20 19 18 4 21 15 6...
