This video from Sears PartsDirect shows how to replace a ground drive belt in some Craftsman zero-turn riding mowers. The ground drive belt connects the engine crankshaft to the transmission pulleys to drive the rear wheels. Inspect the ground drive belt regularly and, if the ground drive belt is damaged, replace it by following the steps in this video.
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Ground drive belt
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The ground drive belt connects the engine crankshaft to the transmission pulleys to drive the rear wheels. Inspect the ground drive belt regularly and, if the ground drive belt is damaged, replace it by following the steps in this video. Before you begin, wear work gloves to protect your hands. Disconnect the spark plug wires and make sure that the parking break is set. Lower the mower deck to the lowest cutting position. Remove the left pulley cover on the mower deck. Push in the blade belt idler pulley and roll the blade drive belt off the left blade pulley. Reach under the rear of the mower frame and remove the blade drive belt from the electric clutch. Disconnect the mower deck mounting pins and release the hanging brackets from the mower deck. Push the mower deck slightly forward and release it from the front bracket. Push the mower deck out from under the mower frame. Unplug the electric clutch wiring harness beside the motor. Remove the mounting screws from the flywheel cover and pull the cover off to access the flywheel nut. Have a helper hold the flywheel nut stationary while you remove the mounting bolt from the clutch. Pull the electric clutch off the engine crankshaft. Have a helper lift the driver seat forward and push on the idler pulley bracket while you roll the ground drive belt off the engine pulley. Release the ground drive belt from the transmission pulleys and pull the belt out of the mower. Route the new ground drive belt over the cooling fans and onto the transmission pulleys. Thread the belt through the idler pulley and over the engine crankshaft pulley. Have your helper push in the idler pulley bracket while you roll the belt onto the engine pulley. Position the bushing on top of the electric clutch. Line up the slot in the electric clutch pulley with the key in the engine shaft and push the electric clutch onto the engine shaft. Make sure that the tab in the electric clutch bracket engages the mounting slot on the electric clutch frame. While your helper holds the flywheel nut, reinstall the electric clutch mounting bolt. Reattach the flywheel cover. Reconnect the electric clutch wire harness. Push the mower deck under the mower frame. Reinstall the mower deck on the front bracket. Reinstall the mower deck hanging brackets and secure them with the mounting pins. Reinstall the blade drive belt into the electric clutch. Push in the blade belt idler pulley and roll the blade belt back onto the left blade pulley. Reinstall the pulley cover. Reconnect both spark plug wires.