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 131 of 344

TM 9-1240-400-34&P

Section IV.

DIRECT SUPPORT MAINTENANCE

4-7. MAINTENANCE OF M138 TELESCOPE MOUNT

This task covers:

a.

Disassembly

c.

Repair

b.

Cleaning

d.

Reassembly

INITIAL SETUP:

General Safety Instructions

Tools and Special Tools

Tool kit, electronic: system maintenance

(SC 5180-95-CL-B29)

Adjustable spanner wrench (7597708)

Torque converter (figure 6, appx D)

Materials/Parts

Aircraft grease (item 8, appx C)

Sealing compound (item 10, appx C)

Self-locking screw (NAS1352-3LL8P)

References

TM 9-254

Equipment Conditions

M138 telescope mount removed from

M110 A2 howitzer (TM 9-2350-30420-2)

DISASSEMBLY

1

Remove pin (1) from manual control lever (2).

NOTE

Detent plunger is spring-loaded.

2

Remove manual control lever (2), detent plunger

(3), spring (4), and retaining ring (5).

3

Remove setscrew (6) using adjustable spanner

wrench.

Remove externally threaded ring (7) from

adapter (8).

4-6

Use adhesives, cleaning solvents, and sealing

compounds in well ventilated area away from

open flame.

Adhesives, cleaning solvents,

and sealing compounds are harmful to skin

and clothing, can burn easily, and may give off

harmful vapor