🔍 Key Concepts

• Study the right‑side perspective view of the sootblower to identify the driving mechanism on the outer shaft. • Compare the shapes of a handwheel, chain sprocket, hand‑crank, and motor housing with what you see in the illustration. • Remember that a pneumatic motor must have an air supply line and a motor body, not just a simple mechanical linkage.

💭 Think About

• Look closely at the component marked near the outer end of the shaft: does it look more like a wheel for fingers, a sprocket for chain, a square for a crank, or a motor casing? • Is there any indication of a power line (air) going to a motor on the drive side, or does it appear to be entirely manually operated? • Does the diagram show any continuous loop path where a chain could run, or does it suggest a different kind of manual engagement?

✅ Before You Answer

• Verify whether you can see any air supply connection to a motor on the drive side, separate from the steam/air inlet to the nozzle. • Check if the drive part has teeth suitable for a chain or instead looks like a wheel/handle or crank fitting. • Confirm whether the end of the shaft has a square or keyed end where a removable operating handle could be attached.