SECTlON II: HULL AND CAB COMPONENTS
TM 9-2350-256-20
8
Install four studs (5), four retainers (2), four flat Mashers (A), and four wingnuts (1). Do not tighten wingnuts.
9
Install three periscope blocks (3) in hull openings and secure with four retainers (3). Tighten four wingnuts
(1).
9-42 REPLACE MECHANICS PERISCOPE BLOCK AND VISION PRISMS
THIS TASK COVERS
a. Removal
b. Installation
INITIAL SET-UP
Tools:
Tool kit, general mechanics (Appendix C,
item 53)
Socket set (Appendix C, item 49)
Wrench, torque (Appendix C, item 63)
Material/Parts:
Compound, sealing (Appendix D, item 27)
Lockwires (2) (Appendix G, item 154)
Seals (3) (Appendix G, item 251)
NOTE
See paragraph 9-31 for removal and
installation of typical vision prism.
a. REMOVAL
1
Loosen two wingnuts (1) and release periscope by.
turning two retainers (2) 1/2 turn. Pull periscope
block (3) from hull opening.
2
Remove two wingnuts (1), two flat washers (4),
two retainers (3), and two studs (5).
9-69