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Models:  02-0517C0140 & 02A0517C0140 

5 Ton (4.5 Metric Ton) 

Two Stage Jack 

 

 

09/2006 - AA - Rev. OR 

- 4 - 

 

1.4.2 Jack 

Instructions 

(continued) 

7. 

Hydraulic rams must extend in order from largest to smallest diameter. 

8. 

Largest diameter hydraulic ram must fully extend before the next stage ram begin to 
raise. 

9. 

Lower mechanical lock nut(s) while extending rams. 

10. 

Do not continue to operate air pump after all rams have fully extended. 

 

WARNING! 

• 

The ram locknuts are user operated safety devices. Failure to utilize these locknuts may 
result in personal injury or death. 

• 

Do not place hands on top of jack near ram locknuts while lowering jack. Pinch points 
exist between top of jack and threads on ram. 

• 

Always wear safety glasses. 

 

To Lower Aircraft:

 

1. 

Lower all jacks simultaneously. 

2. 

If ram locking nut(s) is tight, raise jack slightly to release nut(s). 

3. 

Ensure proper staging as aircraft is being lowered: loosen locknut beginning with smallest 
ram (2” max) until stage is completely lowered. Repeat for next smallest stage. 

4. 

Loosen pump release valve slightly to slowly lower aircraft. 

 

NOTE: 

When using jack during washing operations, completely cover top of jack near ram 
seal. 

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