TM 9-2350-256-20-2
UNIT MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
DRIVER'S AND RIGGER'S PERISCOPE BLOCKS AND VISION PRISMS REPLACEMENT
REMOVAL, INSTALLATION
INITIAL SETUP:
Materials/Parts (cont.)
Tools and Special Tools
Tool kit, general mechanic's (item 59, WP 0490 00)
Lockwires (2) (item 364, WP 0491 00)
Socket set (item 55, WP 0490 00)
Screws (5) (item 203, WP 0491 00)
Wrench, torque (item 68, WP 0490 00)
Seals (2) (item 297, WP 0491 00)
Studs (4) (item 737, WP 0491 00)
Materials/Parts
Washers, flat (4) (item 537, WP 0491 00)
Compound, sealing (item 31, WP 0489 00)
Wingnuts (4) (item 661, WP 0491 00)
NOTE
Removal and installation procedures are the same for both driver's and rigger's periscope blocks and
vision prisms. Driver's side shown.
NOTE
Steps 1 and 2 apply only to periscope blocks. Proceed to step 3 for vision prism removal.
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).
0326 00-1
