TM 5-3810-306-20ELEVATION SWING WARNING SWITCH INSTALLATIONTOOLS: General mechanic’s tool kit: automotive (5180-00-177-7033)SUPPLIES:Lockwasher (Item 7, Appendix C)EQUIPMENT CONDITIONS: Boom fully elevated.Disconnect ground cable at shunt. (Refer to page 8-109.)REMOVAL:1.REMOVE ELEVATION SWING WARNINGSWITCH (1).a.Remove screws (2) and cover (3) from switch(1).b.Tag and disconnect electrical wires inside switch(1).c.Loosen outer nut on strain relief (4) and pullelectrical wires out of switch (1).d.Remove screws (5), lockwashers (6) and switch(1) from boom pivot box. Discard lockwashers(6)2.LOOSEN HEX HEAD SCREW (7) AND REMOVE306-10.) ARM (8) FROM SWITCH (1). RETAINARM (8) FOR INSTALLATION.3.REMOVE STRAIN RELIEF (4) FROM SWITCH (1)AND RETAIN FOR INSTALLATION.INSTALLATION:1.INSTALL STRAIN RELIEF (4) IN SWITCH (1).2.INSTALL ARM (8) ON SWITCH (1). DO NOTTIGHTEN HEX SCREW (7) AT THIS TIME.3.INSTALL ELEVATION SWING WARNING SWITCH(1).a.Install switch (1) on boom pivot box with screws(5) and new lockwashers (6).b.Loosen outer nut on strain relief (4) andinsert electrical wires through strain relief (4) into switch(1).c.Connect electrical wire insides switch (1).astagged.d.Install cover (3) on switch (1) with screws (2).4.CONNECT GROUND CABLE AT SHUNT. (REFERTO PAGE 8-109.)5.ADJUST SWITCH (1).ADJUSTMENT:1.ADJUST ELEVATION SWING WARNING SWITCH(1).a.Start crane and lower boom to 10 degrees.(Refer to TM 5-3810-306-10)b.Rotate arm (8) on switch (1) until roller on armcontacts turntable support plate. Tighten hexscrew (7).c.Elevate boom to 20 degrees and rotate boomover rear of crane.d.Lower boom slowly, boom elevation swingwarning light in cab should illuminate when boomis approximately 7.5 degrees above horizontal.e.With warning light activated and boom atapproximately 7.5 degrees, check that clearancebetween lift cylinder and engine hood is aminimum of 3 in. (7.62 cm)f.Adjust arm (8) on switch (1) to obtainrequirements.END OF TASK8-60
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