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 9 of 344
TM 9-1240-400-34&P
CHAPTER 1
INTRODUCTION
Section I.
GENERAL INFORMATION
1-1.
SCOPE.
a.
Type of Manual.
Direct and general support
maintenance.
b.
Model Numbers and Equipment Names:
(1)
M115 Panoramic Telescope
(2)
M138 Telescope Mount
(3)
M137 Telescope Mount
(4)
M139 Telescope Elbow
c.
Purpose of Equipment.
(1)
M115 Panoramic Telescope is used on
M11 OA2 self-propelled howitzer for direct or indirect
sighting as part of a two-sight, two-man system.
(2)
M138 Telescope Mount adapts M139
elbow telescope to M110A2 self-propelled howitzer and
provides adjustments in elevation and deflection
(azimuth).
(3)
M137 Telescope Mount adapts M115
panoramic telescope to M11 OA2 self-propelled howitzer
and provides adjustments in elevation and cant (cross-
level).
(4)
M139 Telescope Elbow is used to lay the
M11 OA2 self-propelled howitzer in elevation and
deflection for direct fire operation.
1-2.
MAINTENANCE FORMS, RECORDS, AND
REPORTS.
Department of the Army forms and
procedures used for equipment maintenance will be
prescribed by DA PAM 738-750.
The Army Maintenance
Management System (TAMMS).
1-3.
DESTRUCTION OF ARMY MATERIEL TO
PREVENT ENEMY USE.
Fire control instruments must
be destroyed in a way that same essential parts, on like
equipment, cannot be used to construct one complete
unit from damaged ones.
Refer to TM 750-244-6.
1-4.
PREPARATION FOR STORAGE OR SHIPMENT.
Administrative storage is restricted to 90 days and must
not be extended.
Refer to TM 9-2350-304-20-2 and SB
740-95-700,
Storage
Serviceability
Standards
for
ARRCOM Materiel for Fire Control Items, for detailed
instructions on administrative storage.
1-5.
OFFICIAL NOMENCLATURE, NAMES, AND
DESIGNATIONS.
Shortened nomenclature is used in
this manual to make procedures easier for you to read.
A cross-reference between the shortened nomenclature
and its official nomenclature is shown in the following
table.
Nomenclature Cross-Reference List
Manual
Official
Nomanclature
Nomenclature
Bracket
Angle bracket
Cap
Air valve cap
Setscrew
Socket wrench
attachment
Cover
Riveted door
Eccentric
Control cam
Eccentric ring
Optical element
holder
Elevation knob
Knob assembly
Elevation level
Fire control
vial tube
level
1-1
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