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TM 9-2320-356-BD
13-6.
COIL SPRING DAMAGE
General Information:
The coil spring is made of a length of steel rod wound into a coil. The coils are
heat treated to make them elastic and to give them strength. A damaged coil that
has been severed cannot be repaired by welding the broken area. Heating the coil
removes the temper and the elasticity from the coil and it will collapse with any
weight or force on it.
Limitations:
o Reduced speed in rough terrain
o Reduced vehicle capacity
Personnel/Time Required:
o 2 soldiers
o 1 to 2 hours
Materials/Tools:
o Arc welder
o Acetylene and oxygen
o C-clamp
o Steel rods (minimum
1/2 inch thick)
Procedural Steps:
1.
Raise the vehicle with a jack or a wrecker so that vehicle is level.
2.
Measure the length of the coil spring.
3.
Cut three pieces of steel rod the same length as the spring.
4.
Weld the steel rods to the spring at approximately equal distances apart.
5.
Record the BDAR action taken.
When the mission is completed, as soon as
practicable,
repair using standard maintenance procedures.
13-7.
LEAF SPRING DAMAGE
General Information:
Leaf springs are made of heat-treated carbon steel for elasticity and strength.
Welding broken or damaged leaf springs will remove the temper from the spring and
it will bend with any weight or pressure on it.
Welding can be used as a temporary
fix if care is taken to weld a small amount at a time.
The following procedures
will work only if no more than three leaf springs are broken on large vehicles and
no more than two on small vehicles.
Limitations:
o Reduced speed in rough terrain
o Reduced vehicle capacity
13-4
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