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 315 of 590
6-5
TM 9-1240-401-34&P
Section IV. General Support Maintenance Procedures
6-10. M42 PERISCOPE MAINTENANCE INSTRUCTIONS
This task covers:
a. Disassembly b. Repair c. Assembly
Tools
Tool Kit, Electronic System, Repair, Field Main-
tenance (SC5180-95-CL-B29)
Materials/Parts
Adhesive (Item 2, appx B)
Lockwashers (3) (Item 64, appx E)
Lockwashers (24) (Item 65, appx E)
Lockwashers (4) (Item 69, appx E)
Sealing compound (Item 13, appx B)
a. Disassembly
1
2
3
4
5
6
7
Remove two machine screws (1) and identification
plate (2).
Remove air valve cap (3), valve core (4), purging
valve stem (5), and retaining strap (6) from M42
periscope.
Remove purging machine screw (7).
Remove two headless straight pins (8) only if nec-
essary for replacement.
Remove four machine screws (9), four Iockwashers
(10), and two retaining plates (11). Discard
Iockwashers.
Remove 12 machine screws (12), 12 Iockwashers
(13), and plate and mirror (14). Discard lock-
washers.
Remove two headless straight pins (15) only if
damaged.
References
TM 9-254
TM 750-116
M42 periscope removed from howitzer
(TM 9-2350-311-20-2)
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