TM 5-2420-224-20-2BACKHOE BOOM CYLINDER REPLACEMENT (CONT)C A U T I O NCap or plug all ports and endsof hoses and tubes to preventcontamination of hydraulic oil.Failure to do so may result indamage to equipment.NOTETag lines prior to disconnecting toaid in connecting.4.DISCONNECT three HOSES (7, 8, and 9).INSTALL CAPS or PLUGS.5.REMOVE clamp (10), TUBE (11), two fittings(12 and 13), and two packings (14 and 15).DISCARD PACKINGS.6.ON LEFT SIDE, REMOVE nut (16), lockwasher (17), screw (18), spacer (19), andretainer STRAP (20). DISCARD lock WASHER.7.REMOVE pin (21) and boom CYLINDER (22).I N S T A L L A T I O N1.2.3.4.5.6.7.NOTEProcedure is the same for bothboom cylinders, except as noted.INSTALL boom CYLINDER (22) and pin (21).INSTALL two fittings (12 and 13), two newpackings (14 and 15), TUBE (11), and clamp(10).ON LEFT SIDE, INSTALL retainer STRAP(20), screw (18), spacer (19), new lockwasher (17), and nut (16).REMOVE CAPS or PLUGS. CONNECT threeHOSES (7, 8, and 9).INSTALL CAPSCREW (6) and nut (5).INSTALL WASHER(S) (4) as required tomaintain 0.040-in. (1-mm) clearance. INSTALLrod EYE on rod (3).INSTALL two washers (2) and two snapRINGS (1).NOTEFollow-on Maintenance:Check rear hydraulic tank (LO 5-2420-224-12).4-659
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