🔍 Key Concepts

• Identify whether the system uses air, electricity, or hydraulic fluid by looking at the main components and piping in the illustration. • Note the presence of a reservoir/accumulator and a hydraulic or air motor connected to the engine flywheel. • Compare what you see with what you would expect for a direct air admission system versus a cranking motor system.

💭 Think About

• Do the tanks, lines, and motor in the drawing look more like a compressed air system feeding directly to engine cylinders, or like a fluid-powered motor driving the flywheel? • If this were an electric starting system, what key components (wiring, batteries, solenoid, starter) would you expect to see, and are they present? • Ask yourself whether the rotating device on the left appears to be a starter motor driven by pressurized fluid or an arrangement for admitting air into each cylinder.

✅ Before You Answer

• Verify whether the large cylindrical unit labeled E is acting as a pressure accumulator rather than a battery or air bottle feeding cylinder valves. • Check if the drive unit at I/H is a motor driving the flywheel instead of valves leading to individual cylinders (which would indicate direct air admission). • Confirm that there are no electrical symbols, cables, or spark-related components, and determine whether the working lines are more consistent with hydraulic fluid piping or air admission manifolds.