What should you do if a jack will not rise?

When a jack does not rise, the correct course of action is to check for hydraulic fluid levels, ensure its connections are secure, and look for any obstructions. This approach is vital because the most common reasons a hydraulic jack might fail to lift include low hydraulic fluid levels, which can prevent the proper functioning of the lift mechanism. If the fluid levels are adequate but the jack is still inoperable, examining the connections for any leaks or disconnections is important, as these could also inhibit the jack's operation.

Additionally, checking for obstructions is essential. Any physical blockage can prevent the jack from rising properly, whether it's debris, the positioning of the load, or conditions of the surface it’s on. Focusing on these factors can help diagnose and often resolve the issue without needing more drastic measures, such as replacing the jack or using other tools to lift it, which could lead to unsafe conditions or damage to the equipment.