A certain type of hydraulic jack is suitable for supporting and lifting aircraft when the aircraft is conducting leveling, landing gear retraction and extension tests, replacing wheels, and calibration.
A certain type of hydraulic jack is suitable for supporting and lifting aircraft when the aircraft is conducting leveling, landing gear retraction and extension tests, replacing wheels, and calibration. It is an indispensable and important tool in aviation maintenance and ground support.
1.Hydraulic cylinder and piston rod: transmit pressure through hydraulic oil to generate strong lifting force
2.Hydraulic pump (manual): provide pressure and press the hydraulic oil into the cylinder
3.Control valve: adjust the flow direction of hydraulic oil to control lifting and lowering
4.Safety helmet: prevent accidental descent and ensure stability after lifting
5.Wheel system components: with walking wheels, flexible traction and towing deployment
Based on Pascal's principle, pressure is transmitted through a closed hydraulic system, and a small area piston is used to drive a large area piston to achieve low input force conversion into high output force. During operation, the hydraulic pump pressurizes the piston rod to extend and lift the aircraft; when the pressure is released, the hydraulic oil flows back and the jack slowly descends.
Pre-check: Confirm that the jack has no leakage and the hydraulic oil is sufficient
Positioning: Aim at the structural support point of the aircraft fuselage or wing (refer to the maintenance manual of the model for details)
Lifting: Slowly pressurize, multiple jacks need to be controlled synchronously
Locking: After lifting to the working position, lock the safety helmet to prevent accidental descent (do not rely solely on the hydraulic system)
Return: Move the reversing valve handle to the descending position, the jack gradually releases pressure, and the piston rod slowly descends
Precautions: Do not overload or eccentrically load to prevent structural deformation
Regular inspection: Seal replacement cycle (500 hours), check the cleanliness of the hydraulic oil
Calibration: Pressure and height accuracy calibration once a year
Storage: Retract the piston rod, apply anti-rust oil, and avoid humid environment
