1 32-4. FRAME INSPECTION AND REPAIR (Contd)
(d) Decisions as to whether or not to repair frame will be made in accordance to the following factors:
Provisions of TB 750-98-23 regarding time and materials versus replacement.
Supply and operational considerations.
Appropriate facilities available.
Personnel skill levels.
Influence of other collateral repairs that may be required to return the vehicle to a
Buckled frame rails with both vertical and horizontal bending are extremely difficult to
repair; item should be replaced.
Twisted frame rails generally are unrepairable; replace item.
Frame rails that are bent upward, resulting in tom metal in bottom of rail, must be welded
and have a welded-on fishplate repair. If fishplate would block mounting parts and bolt
holes, replace frame rail.
Ib perform a repair on the frame, a plan is needed due to the large variability of steps and methods
to be employed. This plan is influenced by:
(a) Bending-type repair:
(1) Suitable vehicle restraints.
(2) Solid anchors for pulling or seating snatch blocks.
(3) Pulling (pushing) power source, either mechanical or hydraulic.
(b) Frame rail (and possibly one or more crossmembers) replacement requires a quantity of suitable
(c) Patches, dutchman, fishplates, and reinforcements:
(1) Bulk steel plhte of grade SAE 950 or equivalent (of equal or greater thickness).
(2) Scrap material of like metal from salvage or cannabilization.
(3) Heli-arc welding rods of type AWS A520 (E 707-l) or equivalent.
(d) In critical situations, l/4in. (6-mm) construction grade steel angle or plate may be used.
Based on factors of subtasks b and c, prepare a plan to return the vehicle to mission-serviceable
e. Repair Procedures
Bulk heating of frame rails to remove bends and buckles is not an
approved procedure. The strength characteristics of the metal are
affected. The repair may fail, causing damage to equipment.
The repair or replacement procedure will vary with type&) and
location(s) of failure(s). For this reason, much of the repair work
depends on skill of the mechanics, supply status, and operational
situation. The removal/replacement of parts, bolts, and brackets
affecting the repair are left to the discretion of the mechanics and
will be governed by the instructions in this manual and repair