2-39. TIRE REPAIR AND REPAIR LIMITS (Con't).
b. TYPES OF TIRE REPAIRS
There are three different types of tire repairs shown in this manual. Which type used to repair and injury
will depend on the type of injury, the extent of the injury, the location of the injury and the construction
characteristics and application of the tire. The three basic tire repair types are as follows:
(1) Puncture Repair (also known as nail hole repair). These types of repairs are for minor punctures
in the tread crown area only. It consist of cleaning and buffing the damaged area, filling the injured cavity
with a repair insert, stem or material, and applying cement and a patch specifically designed for punctures,
to the inner liner. Repair units may also come as a combination patch-plug (also known as tee-unit).
(2) Spot Repairs. These types of repairs are for filling outside injuries that only extend into the
surface rubber on the tread, shoulder and sidewalls of radial tires or no more than 25% of the actual plies
of a bias tire. Because spot repairs are surface type repairs, no reinforcement patch is needed.
(3) Section Repairs. These type of repairs are for sidewall, shoulder and tread crown injuries that
usually extend through the casing or beyond 25% of the actual body plies of bias tires. These type of
repairs can be accomplished using a heated spotter to cure hole fill material and a reinforced patch, or
chemically cured fill materials and reinforced patch. Repair kits available from the military supply system
and outlined in this manual, do not require heat application with a spotter as they come with chemically
vulcanized fill material and patch or chemically cured reinforced patch-plug combination (a.k.a. tee-unit).
c. NON-REPAIRABLE AREAS
Use the illustrations and tables below and on the next page to determine if tire injuries can be repaired. If tires are
injured outside the repairable areas or beyond the tolerances indicated, the tire should be scraped.
Table 2-6. NON-REPAIRABLE
FOR BODY PLY DAMAGE
TIRE CROSS NON-REPAIRABLE
All Passenger Car Tires 1 1/2" (38.1 mm)
Truck Tubetype up to 7.5 3" (76.2mm)
8.25 and above
3 1/2" (88.9mm)
Truck Tubeless up to 8.5 3" (76.2mm)
9 and above
3 1/2" (88.9mm)