4-107. SIGNAL ENTRY BOX AND POWER ENTRY BOX REPLACEMENT (M348A2K AND
This Task Covers:
b. Cleaning and Inspection
Incoming signal and power cables removed.
General mechanic's tool kit
Ten locknuts (signal entry box)
Drill bit set
Z Twenty-four locknuts (power entry box)
Seventy-four rivets (signal entry box)
Z Rivet gun
Z Ninety-six rivets (power entry box)
This procedure is typical for the signal entry box and power entry box installed on the
M348A2K and M348A2N semitrailers. M348A2K signal entry box is illustrated.
Remove nine screws (9) securing plate (10) and shield (11) to semitrailer. Remove plate and shield.
Remove nine rivets (7) securing hinge (6) and spacer (5) to frame (1). Remove hinge with cover (18) attached
and spacer from frame. Discard rivets.
Signal entry box frame is mounted with 18 rivets. Power entry box frame is mounted
with 40 rivets.
Remove rivets (23) securing frame (1) to semitrailer. Remove frame. Discard rivets.
Remove nine rivets (8) securing hinge (6) to cover (18). Remove hinge. Discard rivets.
Remove locknut (12), flatwasher (1 3), spring washer (14), bushing (1 5), latch (1 6), and flatwasher (17) from each
stud on cover (18). Discard locknuts.
Remove two locknuts (4) and flatwashers (3) securing each keeper (2) to frame (1). Remove keepers. Discard
Remove wingnut (22), rod (21), nut (20), and flatwasher (19) from each stud in frame (1).
Remove nine rivets (28) securing each shield hinge (25) to cover (1 8). Remove hinges and shields (26). Discard
Remove nine rivets (27) securing shields (26) to shield hinges (25). Remove shields from hinges. Discard rivets.
Remove wingnut (35), flatwasher (34), plate (33), and locknut (32) from stud (29). Press stud out of cover (18).
Remove two rivets (30) securing strap (31 ) to cover (18). Remove strap. Discard rivets.
Remove top and bottom gaskets (24) and two side gaskets (36) from cover (18). Discard gaskets.