TM 9-2350-277-20-4REPLACE COMMANDER’S CUPOLA VISION BLOCK LOCKS AND SEALS(M113A3 AND M1059A3, M58 ONLY)0490 00THIS WORK PACKAGE COVERS:Removal (page 0490 00-1).Installation (page 0490 00-3).INITIAL SETUP:Maintenance LevelUnitTools and Special ToolsGeneral Mechanic’s Tool Kit (WP 0926 00, Item 65)Materials/PartsAdhesive (WP 0928 00, Item 4)SealSpring pinPersonnel RequiredUnit MechanicReferencesSee your -10Equipment ConditionEngine stopped (see your -10)Carrier blocked (see your -10)Vision block removed (see your -10)REMOVALNOTEThere are five vision blocks on the commander’s cupola. Each block has two locks and one seal.Task is for one lock and one seal.0490 00-1
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