When changing out a forklift cylinder, the cylinder service valve should be ______ prior to making the hose connection to the cylinder?

• A. Open
• B. Closed
• C. Partially Open
• D. Tightly Closed

Answer: (B)

Controlling gas flow from the cylinder is the key safety step when changing a forklift cylinder. The service valve should be closed before attaching the hose to the cylinder so no propane can flow if the connection isn’t yet secure. This prevents gas from escaping into the work area and reduces the risk of a fire or fuel-ignition if there’s a leak during connection. Once the hose is firmly connected, you can open the valve slowly to pressurize the line and then check all connections for leaks with a soap solution before using. Opening the valve or leaving it partially open would allow gas to escape during the connection process, creating a hazardous situation, and the term “tightly closed” isn’t the standard way to describe the proper step.