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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.

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