Hydraulic cylinders move and control mechanisms. They draw power from pressurized fluid, typically oil. The device is typically found in engineering vehicles. The cylinder has a variety of parts that require service for regular, consistent operation, and you'll need to remove the cylinder nuts to perform maintenance tasks.
Hydraulic wrenches remove nuts on hydraulic cylinders located in cramped spaces. The wrench has pressurized fluid that allows the user to exert more torque pressure. Hydraulic wrenches are a good choice for removing jammed bolts. As of January 2011, suggested retail pricing for hydraulic wrenches ranges from $57 to $355.
Allen wrenches are also known as hex keys. The most common Allen wrench sizes are 5/32, 3/16 and 1/4 inches. Allen wrenches are better suited for nut removal on smaller hydraulic cylinders. As of January 2011, suggested retail pricing for Allen wrench sets range between $7 and $12.
Nut runners quickly remove hydraulic cylinder nuts. There are many different nut runner attachments to help you reach the nut. Some are powered by pressurized air. As of January 2011, suggested retail pricing for handheld nut runners is between $324 and $1650.