Hi-TTS 4M40 Flywheel Ring Gear 120 Teeth for 307C/307D/308B Excavator (MD024812 23212-42000) Construction Equipment Describe: How do I know if my flywheel needs replacing? Here are some common symptoms you should look for: 1.A hard clutch pedal. 2.Difficult changing gear. 3.Scratching noises from engine, especially at lower speeds. 4.Jerking or shaking. 5.Clutch slipping (without a burning smell) Quick Details: Part No Flywheel Ring Gear Engine No. 4M40 Part No MD024812 23212