October 1979
Use of Regrooved, Recap and Retread Tires on the IHC 20 Ton (CCE) Dump Truck
US Army Mobility Equipment Research and Development Command, Fort Belvoir, Virginia 22060
1.
The front tires on the CCE-IHC 20 Ton Dump Truck should be replaced either with a pair of new tires or a pair of
recapped tires when they become so worn that they are no longer safe for steering the truck on a slippery surface.
Regrooving of "Regroovable" marked front tires on this size truck-is not recommended, since the tread depth of the
regrooving operation cannot compare favorably with the recap tire tread depth. In addition, the practice of sipping (tread
cuts) on front tires of this size is not recommended.
2.
The BMCS (Bureau of Motor Carrier Safety) does allow truck users to-install properly recapped tires on these front
axles. The BMCS inspectors will attach an "Out of Service" sticker on these trucks having front axle "tire tread depths
measuring 4/32 inches or less" (1/8 in. or 3/2 mm).
3.
The CCE-IHC dump truck uses the deep traction lug feature of the front tires for directional control in steering the
truck. For this reason, dump trucks that are operated with worn front tires have only two tires with marginal tractive ability
trying to counter-act the forces of eight rear tires determined to go straight ahead. Per DOT, tires are considered to be
worn out when 1/8-inch or less tread remains. Dump truck drivers find that long before reaching this legal level of wear,
there is just not enough steering side-thrust to maneuver the trucks. Therefore, it is technically recommended that new or
recapped front tires be installed when the front tire tread becomes less than 1/4-inch for predominately highway travel, or
1/2-inch for predominately unpaved road travel.
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