Section V. MAINTENANCE PROCEDURES
3-7. INTRODUCTION. This section contains maintenance procedures for the bridge authorized by
the Maintenance allocation Chart (Appendix B). Inspection, welding, rivet and bolt substitution, and
repair instructions which are common to several repair procedures are included here to avoid repetition.
Special or additional instructions applicable to a repair procedure are given with the particular repair
Inspect the bridge in accordance with the Preventive Maintenance Checks and Services (PMCS) listed in
Section II of Chapter 2. Signs of stress, hairline cracks, or other damage may be hidden. A close
inspection of sections, braces, couplings, and connecting hardware is required. Replace any item, part,
or component whose structure or strength is in question.
3-9. CHECKS, ADJUSTMENTS, AND ALIGNMENTS. Follow the inspection procedures called
out in the PMCS. Additional checks shall be made as necessary. There are no adjustments or
alignments for the bridge.
3-10. RIVET AND BOLT SUBSTITUTION AND REPAIR.
a. General. The following procedures are the only authorized method for the removal of damaged
rivets and the substitution of bolts, washers and nuts on the bridge. Repairs dealing with the removal
and replacement of rivets and bolts on the bridge shall be IAW the paragraph. Rivets will not be
replaced by operator/unit personnel. Damaged rivets will be replaced with bolts as defined in Table 3-2.
Never use a bolt or piece of attaching hardware if the strength and hardness of that item does not meet
the minimum requirements as set forth in this paragraph and these procedures.
Use of nuts, bolts, and washers is only a temporary repair for damaged rivets. The bridge
should be sent to Depot for re-riveting. Bolts will not provide the high strength
connection required for extended normal operation. Structural failure and injury to
personnel can result from the use of unauthorized hardware.
b. Rivet Replacement With Bolts.
(1) Carefully center-punch head of buttonhead and countersunk rivets. When removing pin rivets
go to step (4).
(2) Carefully drill out the center of the rivet. For 3/4 in. rivet, use a 5/8 in. bit; for a 1/2 in. rivet,
use a 3/8 in bit.
3-8 Change 2