46 of fluid is connected to the brake actuator 17 through a conduit 48 a one way check valve 50 and the conduit 30 the one way check valve 50 is adapted to pass fluid to the brake from the second source and prevent reverse flow in the conduit 48 the second source 46 of fluid includes the conduit 48 connected to the source 12 and a control orifice 52 located in the conduit 48 a means 54 is provided for establishing a predetermined pressure level in the second source 46 of fluid and the brake 16 in response to the spool 38 being moved to the intermediate position 42 the means 54 includes a first relief valve 56 connected to the conduit 48 between the control orifice 52 and the one way check valve 50 the first relief valve 56 is adapted to control the maximum pressure level of the second source 46 and hence the pressure in brake actuator 17 at the intermediate position 42 of the valve spool 38 the winch and draw works mechanism 18 is of the conventional design having a winch and gearing mechanism for driving the winch and is adapted to receive fluid from the exhaust port 32 of control valve 22 and the relief valve 56 for lubrication of the gears and bearings of the draw works mechanism the winch and draw works mechanism 18 receives fluid through a first fluid pathway 58 in response to the control valve being in the first position.