1. Jacks, cylinders, presses, spreaders, and other accessories have capacity or tonnage ratings.
NOTE: Pumps are rated for maximum operating pressure in bar [psi].
2. True – Side loading can damage a jack or cylinder by distorting the wiper seal and bending the plunger. Side loading also creates an unstable setup which may shift or fall.
3. If you need to lift a load further than the rated stroke, block the load, raise the level of the cylinder with a sturdy support, and continue the lift. You could also switch to a jack or cylinder with a longer stroke.
4. False – Never work under a load that is held up by a jack or cylinder. The load must be securely blocked before anyone goes under it.
5. True – You should never weld or otherwise modify a cylinder to attach a base or other support.
6. False – Adding an extension to a pump handle will not give you more leverage, but it will make the pump unstable.
7. False – You should tighten coupler connections hand tight only, but do be sure that all threads are fully engaged.
8. If cylinder movement is jerky, air may be trapped in the hydraulic system.
9. When you add extensions to a cylinder, the maximum operating pressure must be cut in half, to 350 bar [5,000 psi]. Always use a gauge to verify the operating pressure.
10. True – The 80% rule applies to cylinder stroke and cylinder capacity. Following the 80% rule will result in more stable setups and prolong the life of your equipment.