C 1, TM 9-6650-221-35
CHAPTER 1
INTRODUCTION
Section I. GENERAL
AMSWE-MAF W3100, Philadelphia, Pa. 19137 on DA
1-1.
Scope
Form 2028.
a. This publication contains instructions for the
1-3.
Maintenance Allocation and Parts
repair of periscope, tank M47, 6650-788-5464, and
The maintenance allocation chart in TM 9-2350230-12
associated equipment, by direct support (DS), general
and repair parts and tools listed in appendix II allocates
support (GS), and depot shops.
maintenance responsibilities.
b. These instructions are used in conjunction
with and are supplementary to those in the operator's
1-4.
Forms, Records, and Reports
and organizational maintenance manual for armored
reconnaissance-airborne
assault
vehicle,
M551.
a. Authorized Forms. The forms are listed in
Instructions for operation, lubrication, and operator's
DA Pamphlet 310-2 and TM 38-750.
maintenance (including installation and removal
b. Report of Accidents. The necessary reports
procedures, as well as tests and adjustments after
are prescribed in AR 385-40.
installation) are contained in TM 92350-230-12. It may
c. Equipment Improvement Recommendations
be necessary to refer to this manual for complete
(EIR).
procedures.
Use
the
Equipment
Improvement
Recommendation section of DA Form 2407.
1-2.
Comments
Report errors, omissions, and recommendations directly
to the Commanding Officer, Frankford, Arsenal, ATTN:
Section II. DESCRIPTION AND DATA
c.
Head Assembly 6650-906-7941.
1-5.
Description
(1) Head
assembly
6650-906-7941
contains prism 8599693 (fig. 1-2) which is mounted in
a. General. Periscope M47 (figs. 1-1 and 1-2)
the head and sealed against water penetration. The
is a unity-power daylight periscope that provides a 50-
bottom the head is open but is provided with a gasket for
degree horizontal and 14-degree vertical field-of-view.
sealing when joined with body assembly 10613610.
Periscope M47 is used in conjunction with the M551
(2) Two mounting holes (fig. 1-2) are
Vehicle and consists of head assembly 6650-9067941
provided on the head for engaging the plungers of mount
and body assembly 10513620. A functional description
assembly 6650-906-7944. Mount assembly 6650906-
and operating instruction for periscope are provided in
7944 is required for assembling head assembly 6650-
TM 92350-230-12.
906-7941 to body assembly 10513620.
b. Optical Scheme. Two prisms and an optical
d. Body Assembly 10513620.
instrument window (fig.
(1) Body assembly 10513620 is a sealed
components of periscope XM47. Prism 8599693 is
unit, filled with nitrogen gas, that receives the reflected
located in head assembly 6650-906-7941 and deflects a
line-of-sight from the head assembly 6650-9067941.
forward line of sight through optical instrument window
Optical instrument window 6650-902-9741 (fig. 1-1) is
6650-902-9741 of body assembly 10613620 to prism
enclosed in a sealed frame and is mounted on the top of
8599694. Prism 8599694 displays the field-of-view to
the body.
the operator.
1-1
