TM 9-2350-238-34-22-28. MAINTENANCE OF BOOM AND WINCH –CONTROL CYLINDERS AND AT-TACHING PARTS AND BOOM CONTROL CYLINDER ASSEMBLY (CONT).REASSEMBLY (CONT)4 Install new packing (5) and two new pre-formed packings (6) on hydraulic piston(4) and lubricate with hydraulic fluid (item10, appx B).5 Lubricate cylinder bore in cylinder boombarrel (7) with hydraulic fluid (item 10,appx B).6 Hold cylinder boom barrel (7) in verticalposition and power hydraulic piston (4) in-to bore, using care not to damage newpreformed packings.7 Install new packing (8) in boom cylinderhead (9).8 Using arbor press and block with a 3.9-in,(9.9-cm) diameter, install new seal (10) inboom cylinder head (9).2-92Change 1
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