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)16 Aline pin hole in cylinder boom barrelwith pin hole in boom cylinder head ex-ternally threaded ring. Insert new cotterpin (14) through pin holes to secureboom cylinder head externally threadedring (12).17 Install two new preformed packings (15),and two machine thread plugs (16).1 Refer to TM 9-4940-468-14 for test setup4 Connect hydraulic line or hose (4) to portand testing procedures.(3). Leave port (5), at closed end of boomcontrol cylinder assembly (2), open.2 Retract hydraulic piston (1) into boomcontrol cylinder assembly (2).5 Apply 4000 psi (27,580 kPa) hydraulicpressure to boom control cylinder3 Fill boom control cylinder assembly (2)assembly (2) through hydraulic line orthrough upper port (3) with hydraulic fluidhose (4) for 5 minutes.(item 10, appx B).2-94
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