ARMY *TM 9-6115-464-34 AIR FORCE TO-35C2-3 ... - Igor Chudov

ARMY TM 9-6115-464-34AIR FORCE TO 35C2-3-445-2NAVY NAVFAC P-8-624-343-39. GENERAL.Section V. MAINTENANCE OF HYDRAULIC SYSTEM(ELECTRO-HYDRAULIC GOVERNOR EQUIPPED PRECISE SETS ONLY)The hydraulic system provides a means of precise frequency control on all MEP-103A and someMEP-113A precise generator sets. The system consists of a sump, a replaceable element type filter, a geartype positive displacement pump and a hydraulic actuator unit. The hydraulic pump draws oil from the sumpand forces it through the filter. From the filter, the oil flows to the hydraulic actuator unit. An electricallycontrolled set of valves alters the path of the oil which determines the positioning of the governor controllinkage. The position of the governor control linkage determines the fuel pump governor setting, which setsengine speed. Changes in engine speed causes a corresponding increase or decrease in generator outputfrequency.3-40. HYDRAULIC SUMP.a. Removal.(1) Refer to the Operator and Unit Maintenance Manual and drain the hydraulic sump.(2) Disconnect hydraulic lines (1, figure 3-33).(3) Remove nuts (2), Iockwashers (3) and screws (4) to remove hydraulic sump (5).(4) Remove cap and dipstick assembly (6) and elbows (7) from sump.Cleaning, Inspection, and RepairWARNINGSolvent, Dry Cleaning P–D-680, Type II is flammable and moderately toxic to skin,eyes and respiratory tract. Eye and skin protection required. Good general ventilationis normally adequate. Failure to observe this warning could cause servere personalinjury.WARNINGCompressed air used for cleaning and drying purposes can create airborne particlesthat may enter the eyes. Pressure shall not exceed 30 psig and use only with adequatechip guards and chipping goggles. Failure to observe this warning could causeservere personal injury.(1) Clean all parts in solvent P-D-680 Type II and dry thoroughly with filtered compressed air.(2) Flush interior of sump with an approved solvent and dry thoroughly.(3) Visually inspect hydraulic sump for cracked or broken welds, defective paint, illegible markings, anddents.(4) Inspect cap and dipstick assembly for corrosion, bent dipstick, and other damage.(5) Check all threads for crossing, stripping, and peening.3-81