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 150 of 590

TM 9-1240-401-34&P

4-20. COUNTER BOX ASSEMBLY MAINTENANCE INSTRUCTIONS

This task covers:

a. Removal b. Disassembly

c. Repair d. Assembly e. Installation

Tools

INITIAL SET-UP

Lockwashers (3) (Item 68, appx E)

Lockwashers (4) (Item 71, appx E)

Tool Kit, Electronic System, Repair, Field Mainte-

Sealing compound (Item 13, appx B)

nance (SC5180-95-CL-B29)

5180-01-168-0487

Tubular spanner wrench, 11/16 and 45/64 inch

TM 9-254

(Item 26, appx F)

TM 750-116

Materials/Parts

Adhesive (Item 2, appx B)

M145/M145A1 telescope mount removed

Lockwashers (8) (Item 63, appx E)

from howitzer (TM 9–2350-311-20-2/

Lockwashers (4) (Item 64, appx E)

TM 9–2350-314-20-2)

a. Removal

1

2

3

5

6

7

4-36

Remove three machine screws (1), three lock-

washers (2), and plate insulator (3). Discard

Iockwashers.

Remove three machine screws (4), three lock-

washers (5), and three wires (6) with three lug ter-

minals (7) attached. Discard Iockwashers.

Remove two machine screws (8), two Iockwashers

(9), two wires (10) with two lug terminals (11) at-

tached, plate (12), and plate insulator (13). Discard

lockwashers.

Remove two machine screws (14), two lock-

washers (15), and two retaining straps (16).

Discard Iockwashers.

Remove four nuts (17), four Iockwashers (18), and

four flat washers (19). Discard Iockwashers.

Remove counter box assembly (20) from

M145/M145A1 telescope mount.

Remove setscrew (21) and eccentric stud (22).

4