TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 393 of 552

TM 9-2350-311-34-2

4

Inspect bus bars (1) for metal mounds caused by arcing. Use wood chisel (or similar sharp tool) and soft-

headed mallet to remove any metal mounds.

5

Inspect bus bars (1) for small surface pits. Fill very small surface pits with epoxy adhesive.

6

Inspect bus bars (1) for large damaged areas or deep pits. Repair as follows:

(a)

Ream out large damaged areas to a constant depth of 0.125 ± 0.001 inch (3.0 ± 0.025 mm).

(b)

Machine copper insert (4) of 0.125 ± 0.001 inch (3.0 ± 0.025 mm) thickness. Do not allow more than

1/64 inch (0.4 mm) at ends and 1/32 inch (0.8 mm) along sides for adhesive. Electrical contact with

bus bars (1) should be made by base of copper insert.

(c)

Bond copper insert (4) into reamed area (5) with adhesive. Check surface for smoothness after copper

insert bond has cured.

NOTE

Avoid filing polished metal surface off bus bars.

(d)

If necessary, file copper insert (4) smooth to within 0.001 inch (0.025 mm) of bus bars (1).

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