Section I. GENERAL
manual for complete procedures.
a. This publication contains instructions for the
repair of tank periscope M48, 6650-762-9336, and
associated equipment, by direct support (DS
Report errors, omissions, and recommendations
directly to Commanding Officer, Frankford Ar-
general support (GS), and depot shops.
senal, ATTN: AMSWE-MAF-W3100, Philadelphia, I
Note. Refer to DMWR 9-6650-222 for overhaul/
Pa. 19137 on DA Form 2028.
reconditioning instructions for the Periscope M48.
Requests for DMWR 9-6650-222 in support of ap-
1-3. Maintenance Allocation and Parts
proved overhaul /reconditioning programs shall be
forwarded to Commanding Officer, Frankford Ar-
The maintenance allocation chart in TM 9-2350-
senal, ATTN: AMSWE-MAF-W3100, Philadelphia,
230-12 and repair parts and tools listed in
b. These instructions are used in conjunction
1-4. Forms, Records, and Reports
with and are supplementary to those in the opera-
tor's and organizational maintenance manual for
a. Authorized Forms. The forms are listed in
DA Pamplet 310-2 and TM 38-750.
b. Report of Accidents. The necessary reports
M55a. Instructions for operation, lubrication, and
are prescribed in AR 385-40.
operator's maintenance (including installation and
c. Equipment Improvement Recommendations
removal procedures, as well as tests and adjust-
(EIR). Use the Equipment Improvement Recom-
ments after installation) are contained in TM 9-
mendation section of DA Form 2407.
2350-230-12. It may be necessary to refer to this
Section II. DESCRIPTION AND DATA
a vertical lens system to a prism in the body as-
sembly; this prism further deflects the field-of-
a. General. Periscope M48 (figs. l-l and 1-2) is
view through a horizontal lens system and image
an infrared, unity-power binocular periscope that
converter electron tubes to a binocular eyepiece
provides a 41-1/2 degree field-of-view. The peri-
scope is primarily intended for use in conjunction
with two infrared headlights as the driver's night
c. Head Assembly 6650-906- 7941.
(1) Head assembly 6650-906-7941 contains
viewing system in the M551 vehicle. Operating in-
structions and a functional description of peri-
head and sealed against water penetration. The
scope are provided inutm 9-2350-230-12.
bottom of the head is open but is provided with a
b. Optical Scheme. The periscope optical scheme
gasket for sealing when joined with body assembly
(fig. 1-3) consists
of a prism
in the head assembly
which deflects the field-of-view downward through