TM 9-2320-279-34-3M977, M985, and M984E1 Crane Maintenance Instructions (Cont)17-21.HOIST DRIVE MOTOR CONTROL VALVE REMOVAL/REPAlR/INSTALLATION(CONT).NOTEThere are two models of control valves. Model A (Snap-Tite, no longer available asan assembly) has an SAE #4 brake port. Model B (Dana) has an SAE #6 brakeport. Removal procedures are identical for both.a.Removal. Remove four screws (1), lockwashers (2), control valve (3), and two preformedpackings (4).b. Disassembly.NOTEPerform steps (1) through (3) for Model A. Perform steps (3.1) through (3.5) forModel B.(1)(2)Remove two fittings (1) and preformed packings (2).(3)Remove elbow (3) and preformed packing (4).Remove three plugs (5).17-94 Change 3
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