TM-9-1240-400-34-P

TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1993

TM-9-1240-400-34-P - Page 129 of 344

TM 9-1240-400-34&P

4-6. TROUBLESHOOTING PROCEDURES (CONT).

Table 4-2.

DIRECT SUPPORT TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1.

MOUNTING SURFACE (1) AND LOCKING CLAMP (2) DO NOT SEAT M139 TELESCOPE CORRECTLY.

Observe visually.

a.

Remove nicks and burrs.

Refer to TM 9-254.

b.

Repair support assembly.

Refer to p 4-11.

ADAPTER ASSEMBLY

2.

M139 TELESCOPE DOES NOT HOLD ALINEMENT IN DEFLECTION.

Check locking torque.

a.

Torque deflection lock.

Refer to page 4-26.

b.

Tighten adapter nut (3).

3.

M139 TELESCOPE DOES NOT HOLD ALINEMENT WITH LEVER (4) LOCKED.

Check for loose adjusting nut (5).

Adjust nut (5).

Refer to page 4-6.

4-4