TM 5-3810-306-20Section IV. HYDRAULIC SYSTEM MAINTENANCEDRAINING AND FLUSHING HYDRAULIC SYSTEMTOOLS:General mechanic’s tool kit: automotive (5180-00-177-7033)Drain panSUPPLIES:Diesel fuel (82 gal (310 L) Required)Oil, lubricating, MIL-L-2104 Grade 10 (240 gal (934 L) required)EQUIPMENT CONDITIONS: NoneDRAINING AND FLUSHING:NOTEIf a component has been changedbecause of a failure that might allowmetal or abrasive particles to enterthe system, all systems must bethoroughly checked, drained andflushed.1.DRAIN HYDRAULIC RESERVOIR.a. Remove reservoir drain plug (1). Allowapproximately three minutes after oil stopsflowing from drain port, for side walls to drain.NOTEThe hydraulic reservoir capacity is165 gallons (624.5 L)b. Clean and install reservoir drain plug and fillreservoir with a 50-50 mixture of diesel fuel andclean hydraulic oil MIL-L-2104, grade 10.c. Cycle crane through all functions several times;then return crane to its stowed position and turn frontand rear wheels to extreme left. Shut down engine.(Refer to TM 53810-306-10.)d. Remove reservoir drain plug (1) and drainreservoir. Clean and install drain plug (1) and fillreservoir with clean oil, MIL-L2104, grade 10.2.FLUSH HYDRAULIC SYSTEM.CAUTIONOil supply tines must be connectedto the cylinders when flushing thesystem.16-50
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