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 152 of 344

TM 9-1240-400-34&P

ELEVATION LOCKING TORQUE

1

Using torque wrench with torque adapter (figure 3,

appx D), check torque resistance of lever (1).

A

torque of 15.00 in.-lb (1.69 N-m), applied

counterclockwise, shall not move lever from the

detent position.

2

With lever (1) in detent position, use torque adapter

(figure 1, appx D) with torque wrench to apply a

torque of 5.00 in.-lb (0.56 N-m) to worm (2).

The

line of sight of the collimator telescope (3) shall not

change.

ELEVATION ADJUSTING RANGE

1

Turn lever (1) clockwise to pin (2) to release worm

(3).

2

Rotate worm (3) to elevate and depress collimator

telescope (4) at least 25 degrees (444.45 mils) as

measured by gunner’s quadrant (5), held by hand

on parallel bar on top of locking clamp (6).

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