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 139 of 590

TM 9-1240-401-34&P

6

7

8

9

10

11

Adjust cell (18) until bubble of pitch level(19) is

centered. Hold cell (18) and tighten threaded ring

(17).

With M145/M145A1 telescope mount setup as di-

rected, place 1/2- by 3/4- by 6-inch parallel baron

bearing plate in telescope socket (35) so that it is

parallel to main shaft (36).

Place zeroed M1A1 gunner's quadrant (37) on par-

allel bar.

Adjust cross-level mechanism knob (39) until M1A1

gunner’s quadrant (37) level (38) bubble is cen-

tered.

Apply sealing compound (item 15, appx B) to

threaded ring (4) and install into bracket (7).

Adjust cell (5) until bubble of cross-level (6) is cen-

tered. Hold cell (5) and tighten threaded ring (4).

4-16. QUADRANT SUPPORT ASSEMBLY MAINTENANCE INSTRUCTIONS

I

This task covers:

a. Disassembly b. Repair

c. Assembly d. Adjustment

I

ITIAL SET-UP

Tools and Special Tools

.

C-clamp (Item 10, appx F)

Eccentric tool, fabricated (fig C-3, appx C)

Tool Kit, Electronic System, Repair, Field Main-

tenance (SC5180-95-CL-B29)

5180-01-168-0487

Tubular spanner wrench 11/1 6 and 45/64 inch

(Item 26, appx F)

Lockwasher (Item 63, appx E)

Lockwashers (4) (Item 64, appx E)

Lockwashers (2) (Item 66, appx E)

Sealing compound (Item 13, appx B)

dition

M145/M145A1 telescope mount installed on

howitzer

4-25