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Shanghai Junxun Aviation Technology Co.,Ltd.
A320B737 universal jack Instruction Manual3-5

A320B737 universal jack Instruction Manual3-5

Product catalog summary

Introduction
This document is an instruction manual for the A320/B737 universal jack, specifically the QYF-JY, QYF-JW, and QYF-JT types. It includes a detailed description of the jack's components and operational procedures.

Components
The jack consists of several key components including the adjusting screw, piston, cylinder, oil cylinder, working ladder, oil tank, jack main body, drawbar assembly, caster fixed plate, caster, oil pipe, oil tank cover, oil drain valve, horizontal ball, valve body, low-pressure pump, lift handle, high-pressure pump, pneumatic pump, and pressure rod.

Operation Principles
The manual outlines the operation of the jack, which involves tightening the oil discharge valve handle clockwise to operate the manual or pneumatic pump. This action allows pressure oil to enter the cylinder, lifting it and the heavy weight. The oil is then returned to the tank through a flow valve.

Pre-Operation Checks
Before using the jack, ensure the hydraulic oil level is sufficient, check for any damage or leaks in the hydraulic cylinder and pipelines, and verify the normal operation of the manual and pneumatic pumps.

Operational Steps
1. Position the jack under the aircraft and adjust the screw to align with the aircraft's surface.
2. Connect the air source and operate the pneumatic pump to lift the piston.
3. Follow up with the prevention nut to avoid rapid piston descent.
4. After use, rotate the oil discharge valve counterclockwise to lower the piston and release the anti-fall nut.
5. Store the jack in a protected environment to prevent weather damage.

Conclusion
Proper handling and storage of the jack are crucial for maintaining its service life and ensuring safe operation during aircraft maintenance.

Catalog excerpts

A320B737 universal jack Instruction Manual3-5-1

QYF-JW Type QYF-JT Type Instruction Manual QYF-JY Type QYF-JW Type、QYF-JT Type、QYF-JY Type structure diagram of Jack 1. Adjusting screw 2. Piston 3. Cylinder 4. Oil cylinder 5. Working ladder 6. oil tank 7. Jack main body 8. Drawbar assembly 9. Caster fixed plate 10. Caster 11. Oil pipe 12. oil tank cover 13. Oil drain Valve, 14, horizontal ball 15. valve body 16. low-pressure pump17 lift handle 18. high-pressure pump 19. pneumatic pump 20. pressure ro

Open the catalog to page 1

A320B737 universal jack Instruction Manual3-5-2

QYF-JW Type QYF-JT Type QYF-JY Type Hydraulic principle diagram Hydraulic pressure gauge pneumatic pump The handle of the oil discharge valve is tightened clockwise. At this time, the manual pump is operated or the air source is used through the pneumatic pump to make the pressure oil enter the bottom of the cylinder through the valve body, so that the cylinder is quickly lifted and the heavy weight is lifted. The oil in the cylinder wall is forced to open the overflow through the constant pressure reducing valve with the relief valve 100 The flow valve returns the oil to the tank. Ⅴ. Check before...

Open the catalog to page 2

A320B737 universal jack Instruction Manual3-5-3

QYF-JW Type QYF-JT Type Instruction Manual QYF-JY Type Ⅵ. Operation 1. When jacking up the aircraft, push the jack under the aircraft, tighten the oil discharge valve handle in a clockwise direction, screw out the adjusting screw, so that the convex (concave) surface of the adjusting screw and the concave (convex) on the aircraft face, at this time can jack up, otherwise can`t jack up.2. Connect the air source joint with the air source interface on the jack quickly, and then pull the pneumatic valve handle down. When the pneumatic pump makes a thumping sound, the piston in the oil cylinder starts...

Open the catalog to page 3

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