TM-9-1240-401-34-P

TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1993

TM-9-1240-401-34-P - Page 191 of 590

TM 9-1240-401-34&P

12

Remove setscrew (22) and variable resistor knob

(23).

13 Remove four machine screws (24), four lock-

washers (25), access cover (26), and gasket (27).

Discard Iockwashers and gasket.

14 Unsolder wires (28) from variable resistor (29).

15 Remove nut (30) and boot

(31)

from variable resis-

tor

(29).

16

Remove variable resistor (29) from access cover

(26).

17 Remove tube (32).

18 Remove three machine screws (33), three lock-

washers (34), and housing (35). Discard lock-

washers.

I b. Repair

I

1

Remove corrosion, grease, and dirt from all parts.

Refer to TM 9-254 for cleaning instructions.

2 Visually inspect for missing or damaged parts.

3 Repair or replace parts in accordance with author-

ized parts listed in appendix D.

I c. Assembly/installation

I

1

2

3

4

5

6

7

Install housing (35) and secure with three new

Iockwashers (34) and three machine screws (33).

Install wire (28) in tube (32) and install tube into

opening of housing (35).

Mount variable resistor (29) on access cover (26)

and secure with boot (31) and nut (30).

Solder wires (28) to lug terminals of variable resis-

tor (29) using solder and flux.

Apply grease to new gasket (27).

Install access cover (26) and gasket (27) on hous-

ing (35) and secure with four new Iockwashers (25)

and four machine screws (24).

Install variable resistor knob (23) on shaft of vari-

able resistor (29) and secure with setscrew (22).

5-17