TM 10-3930-675-20-20164 00-1RELIEVING HYDRAULIC SYSTEM PRESSURE0164 00THIS WORK PACKAGE COVERSGeneral, Relieving Hydraulic System PressureINITIAL SETUPReferencesTM 10-3930-675-10WARNING•DO NOT disconnect or remove any hydraulic system line or fitting unless hydraulic system pressurehas been relieved. Tighten all connections before applying pressure. Escaping hydraulic fluid underpressure can penetrate the skin, causing serious injury.•Search for leaks with a piece of cardboard. Protect hands and body from high-pressure fluids. If an acci-dent occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removedwithin a few hours or gangrene may result.GENERAL1.During operation of the RTCH, hydraulic pressure is generated by hydraulic pumps to operate the following:a.Lifting boomb.Tophandlerc.Service brakesd.Parking brakese.Steering systemf.Bogie wheel assembly hydraulic cylindersg.Cab movement hydraulic cylinders2.Both brake and steering systems have pressurized accumulators that provide adequate stored energy to operate in theevent of engine shutdown.3.In order to safely perform maintenance on all hydraulic systems, hydraulic pressure must first be relieved. RELIEVING HYDRAULIC SYSTEM PRESSURE1.To relieve hydraulic pressure in ALL systems, perform the following:a.Lower and fully retract boom (TM 10-3930-675-10).b.Shut down engine (TM 10-3930-675-10).
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