TM 5-3895-383-24Flushing Valve (Axle)SMCS Code:4352; 5058; 5066Illustration 56Drive motor flushing valve(1) Orifice. (2) Relief valve. (3) Shuttle valve spool. (A)Closed loop circuit line. (B) Closed loop circuit line. (C) Flushport.Illustration 57Axle Motor(2) Relief valve. (3) Shuttle valve spool.The drive motor flushing valve is located in the closed loopcircuit of the axle motor. Lines (A) and (B) represent the twoloops of the closed loop circuit. The operation of the propelpump in either FORWARD or REVERSE regulates thedirection of flow in the loop. The direction of flow in the loopdetermines whether a line is high pressure or low pressure.Pilot pressure on the high pressure side shifts shuttle valve (3).The low pressure side opens to relief valve (2). The reliefvalve is set at 1800 kPa (261 psi). The return oil on the lowpressure side of the closed loop flows across the relief valve.After passing through the relief valve, the oil flows through port(C) to the motor case. This oil cools the motor and the oilflushes the motor. The amount of flushing oil is controlled bythe size of the orifice (1). The orifice provides10 L/min (2.6 US gpm) of flushing flow.10-50
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