SECTlON II: HULL AND CAB COMPONENTSTM 9-2350-256-208Install four studs (5), four retainers (2), four flat Mashers (A), and four wingnuts (1). Do not tighten wingnuts.9Install three periscope blocks (3) in hull openings and secure with four retainers (3). Tighten four wingnuts(1).9-42 REPLACE MECHANIC’S PERISCOPE BLOCK AND VISION PRISMSTHIS TASK COVERSa. Removalb. InstallationINITIAL SET-UPTools:• Tool kit, general mechanic’s (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)NOTESee paragraph 9-31 for removal andinstallation of typical vision prism.a. REMOVAL1Loosen two wingnuts (1) and release periscope by.turning two retainers (2) 1/2 turn. Pull periscopeblock (3) from hull opening.2Remove two wingnuts (1), two flat washers (4),two retainers (3), and two studs (5).9-69
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