Cl, TM 9-6650-222-35
CHAPTER 5
REPAIR
Section I. GENERAL
5-1. Scope
5-3. General Maintenance Procedures
This chapter contains detailed instructions for the
TM 9-254 presents general maintenance proce-
dures that are most often required in repairing
repair of periscope M48.
Note. This manual contains exploded-view illustrations which
fire control materiel.
depict the complete disassembly of the materiel. This should
not be construed as authority to disassemble materiel beyond
that required to perform operations authorized on the MAC or
5-4. Rescinded
to replace parts other than those authorized in the applicable
5-2. Parts Replacement
5-5. Cleaning
In subsequent repair paragraphs, replacement of
Refer to TM 9-208-1 for procedures most often
authorized parts damaged beyond repair is under-
required in cleaning fire control materiel.
stood.
Section II. REPAIR
prevent proper mounting and alinement of the
5-6. General
catch.
The paragraphs that follow set forth the pro-
c. Installation. Assemble in sequence items 3,
cedures to replace authorized repair parts and to
perform purely maintenance operations not in-
volving repair parts replacement. Refer to ap-
5-8. Repair of Valve Assembly 8201751
pendix II for a list of authorized repair parts.
5-7. Replacement of Catch 1240-191-9213
b. Disassembly. Disassemble items in legend
a. Removal. Disassemble items 1, 2,
and 3
(fig.
c. Inspection. Inspect the parts of the valve as-
b. Inspection.
signs of unserviceability. Pay particular attention
(1) Inspect the hinge pin and the latching
to the condition of the valve and make sure it oper-
member for proper alinement.
ates smoothly, is free of corrosion, and that the
(2) Inspect the mounting surface of the catch
rubber seats are not worn. Inspect the valve stem
for burrs, dirt, or any condition that could pre-
and cap for worn threads and for burrs on the
vent proper seating of the catch when it is in-
threads.
stalled.
d. Assembly. Assemble in reverse legend se-
(3) Inspect the surface of the body assembly
where the catch is mounted for any item that could
5-1