TM 9-2350-261-34REPLACE LOCKED-IN STUDS (M577A2 AND M1068 ONLY) INITIAL SETUP Tools:Personnel Required:General Mechanics Tool Kit (Item 35, App B)Track Vehicle RepairerExtractor Screw Set (Item 32, App B)Hacksaw (Item 39. ADD B)Equipment Conditions:63H10Portable Electric Drill (Item 23, App B)Screw Threading Set (Item 94, App B)Twist Drill Set (Item 98, App B)Engine stopped (see your -10)Carrier blocked (see your -10)R E M O VE1. Use a hacksaw to cut off broken stud asclose to mounting surface as you can.2. If a locked stud with serrated lockring isbeing removed, punch center of remainingstud. Drill a pilot hole.NOTEKey-locked studs have predrilled pilotholes.3. Use an extractor to remove stud.INSTALL4.506.Use correct size tap drill(see table on next page) to drill hole for stud.Tap threads. See table on next page forcorrect thread size.Install stud in threaded hole.7. If stud cannot be turned by hand, lock twojamnuts on nut end of stud. Then turn witha wrench as shown in view A on next page.NOTESee table on next page for correct nutthread size.8.9.10.11.12.Remove jamnuts.If stud with serrated lockring is to beinstalled, place lockring on stud.Cut off a piece of heavy wailed pipe or tub-ing to fit over stud as shown in view B onnext page. See Fabricated Tools, page 2-5.Use a hammer to drive keys or lockringdown to secure stud as shown in view B onnext page.Drive keys flush with mount surface.NOTEDo not drive upper edge of lockring belowupper edge of serrated part of stud. Drivestraight down.8-34Change 3
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