TM-9-2350-256-20-2

RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL VOLUME 2 OF 2

JUNE 2005

TM-9-2350-256-20-2 - Page 683 of 1440

TM 9-2350-256-20-2

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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:

Tools and Special Tools

Tool kit, general mechanic’s (item 59, WP 0490 00)

Socket set (item 55, WP 0490 00)

Wrench, torque (item 68, WP 0490 00)

Materials/Parts

Compound, sealing (item 31, WP 0489 00)

Materials/Parts (cont.)

Lockwires (2) (item 364, WP 0491 00)

Screws (5) (item 203, WP 0491 00)

Seals (2) (item 297, WP 0491 00)

Studs (4) (item 737, WP 0491 00)

Washers, flat (4) (item 537, WP 0491 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).

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