CHAPTER 9: MAINTENANCE OF HULL- AND CAB-RELATED COMPONENTS
TM 9-2350-256-20
9-40 REPLACE PERISCOPE QUICK-RELEASE MOUNT (INFRARED NIGHT VIEWER)
THIS TASK COVERS
a.
Removal
b. Installation
INITIAL SET-UP
Tools:
Parts:
Tool kit, general mechanic's (Appendix C, item 53)
Lockwashers (4) (Appendix G, item 125)
a.
REMOVAL
Remove mount (1) by removing four screws (2), four
lockwashers (3), and four nuts (4).
b.
INSTALLATION
Install mount (1) with four nuts (4), four new lockwashers
(3), and four screws (2).
9-41 REPLACE DRIVER'S AND RIGGER'S PERISCOPE BLOCKS AND VISION PRISMS
THIS TASK COVERS
a.
Removal
b. Installation
INITIAL SET-UP
Tools:
Material/Parts:
•Tool kit, general mechanic's (Appendix C,
•Compound, sealing (Appendix D, item 27)
item 53)
•Lockwires (2) (Appendix G, item 154)
•Socket set (Appendix C, item 49)
•Seals (2) (Appendix G, item 251)
•Wrench, torque (Appendix C, item 62)
NOTE
•Removal and installation procedures are the same for both driver's and rigger's periscope blocks and
vision prisms. Driver's side shown.
•Steps 1 and 2 apply only to periscope blocks. Proceed to step 3 for vision prism removal.
a.
REMOVAL
1
Loosen four wingnuts (1) and release periscopes by turning retainers (2) 1/2 turn. Pull three periscope blocks (3) out
of openings.
2
Remove four wingnuts (1), four flat washers (4), four retainers (2), and four studs (5).
9-66
