Jacks may be hydraulic or mechanical in operation and are available in a wide range of capacities and designs. Proper selection is critical for safety.
Multiple Jacks: Most operations require multiple jacks. It is impossible to raise/lower them in perfect unison, causing uneven loading. Ensure jack capacity is adequate to handle load transfer. Keep the load level.
Floor Stability: Ensure the floor can withstand the point load. Use floor plates to spread the load if necessary. Avoid buried cables or pipes.
Contact: The jack head must be in full, firm contact with the jacking point. Use packers to prevent slipping.
Store jacks upright with the ram/rack/screw fully lowered to protect them from damage. Remove handles/levers and store separately. Never store damaged jacks.
Clean jacks regularly to remove dirt from racks, screws, and seals. Check hydraulic oil levels. Lubricate moving mechanical parts.
Defects to Watch For:
