TM 9-2350-238-10REPLACEMENT OF PERISCOPE M17BOOM BLOCK AND TOW WINCH BLOCKClean boom block and tow winch block andlubricate in accordance with appendix G.TO WING PINTLEClean towing pintle and lubricate in accor-dance with appendix G,TOW HOOKS1 Remove screw (1) and retainer (2) fromperiscope lug (3).2 Hold periscope (4) in place and removescrew (5) and retainer (6) from oppositelug of periscope.3 Remove periscope (4).4 Install periscope (4) by holding in placeand installing screws (5) and retainers(6) on lugs (3) of periscope.DRIVER‘S AND CREWS SEAT1 Lubricate seats in accordance with ap-pendix G.2 If seats will not operate, seat belts aredamaged, or seat cushions are torn,notify unit maintenance personnel.WIRE ROPES3-52Clean boom winch and tow winch wirerope of mud, sand, and other foreignmaterial.Lubricate wire ropes in accordance withappendix G.Wind wire ropes tightly and evenly onwinch drums.Report any damage such as crushing,kinks, or abrasion to unit maintenancepersonnel.Change 31 Remove two lock pins (1).2 Remove pin (2) and tow hook (3).3 To install tow hook (3), place tow hook(3) in position and secure with pin (2)and tow lock pins (1).SPECIAL TOOLSKeep all tools clean and properly stowed.Notify unit maintenance personnel of anymissing or damaged tools.BASIC ISSUE ITEMS (BII)Keep all basic issue items clean and properlystowed. Notify unit maintenance personnel ofany missing or damaged items. See AppendixB for a listing of basic issue items, and Ap-pendix E for location.
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