Section III. CAB BODY REPAIR
This section illustrates and describes procedures for general, inspection, rivet replacement, and aluminum
repair of the cab body.
CAB BODY REPAIR
This task covers:
a. General b. Inspection c. Rivet Replacement d. Aluminum Repair
Tools and Special Equipment:
Shop Equipment, SC 4910-95-CL-A31
Tool Kit, SC 5180-90-CL-N05
Tool Kit, SC 5180-90-CL-N19
Appendix B, Item 30
Appendix B, Item 16
The body is constructed from aluminum alloys that have been heat treated to obtain high strength.
Welding cannot be used to make body repairs. Heat generated in welding will reverse the heat treatment
process and cause a great reduction in strength of material.
The hood is made of SMC (sheet molding compound). Cracks, splits, or holes may be repaired with a
glass-reinforced plastic laminate repair kit, MIL-R-19907C.
Solid 3/16-in-diameter aluminum rivets are the primary method of joining body components. Rivets are
inserted into a hole through two pieces of metal. A second head is formed by manual or pneumatic
impacting or by squeezing the rivet. A bucking bar is used to back up the rivet to form the rivet head.
When making repairs, use blind rivets of the same size or oversize diameter with the appropriate grip
Blind structural aluminum rivets of 3/16-in. diameter are used in applications where there is access from
only one side of the part. Blind rivets are installed using a tool that pulls on the rivet stem causing a bulbed
head to form on the back side of the part. Fastening is complete when the stem breaks off. High strength
is obtained in blind structural rivets by mechanically locking the remaining stem inside the rivet body.
Steel pull-type lock bolt fasteners in 3/16 and 1/4-in. diameter are used where tension or high-shear
loads exist. Lock bolts are two-piece unthreaded fasteners. One part is a high-strength, steel-headed bolt-like
part with serrations on its shank. The mating part is a collar which is swaged over the serrations causing
the fastener to be locked in place.
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