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Purging of air from 4 ram type steering gear system

 The procedure refers to purging of air from 4 ram type steering gear system:

  • Carry out the system isolation as mentioned before.
  • In case of hydraulic ram type steering gear, the casing and the sump should be maintained with 75% of its capacity.
  • Turning bar inserted in the holes of flexible coupling between motor and pump.
  • The air release purge screws on the cylinders are then opened partially. Use correct allen key.
  • The pump put on stroke by pressing the end button of the bi-directional valve.
  • The gear is slowly moved from one direction to another. Ram movement should be on both sides.
  • The level in the tank should start to fall.
  • Air free or bubble free liquid should escape through air release valves.
  • Stop pressing the end button of the bi-directional valve and stop turning the pump.
  • Switch on the breaker and Start the electric motor. Put the switch on local.
  • Under local control, use bi directional valve to move the gear should be moved from one side to another.
  • The air release on the cylinders is noted and the gear is slowly moved from one direction to another.
  • The travel of the rams should be gradually increased, until air free oil is discharged.
  • Pumps are changed over by change over switch.
  • Ram movement is continued, first with one pump and then with other pump.
  • Air release valves are checked periodically to ensure that air has been released.
  • Tighten the air release purge screws.
  • The system is cross checked by giving various helm movements from bridge and from steering flat.


  1. Pump put on stroke by pressing bidirectional solenoid valve... what do you mean by this. Please elaborate


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