Husqvarna MZ6128ZT Owners Manual - Page 49

troubleshooting guide Problem Machine vibrates. Engine overheats. Cause • Blades are loose. • Blades are incorrectly balanced. • Engine is loose. • Clogged air intake or cooling fins. • Engine overloaded. • Poor ventilation around engine. • Defective engine speed regulator. • Too little or no oil in the engine. • Fouled spark plug. Battery not charging. Machine moves slowly, unevenly, or not at all. • Poor contact with battery terminal cable connectors. • Charging lead is disconnected. • Fault in engine charging system. • Parking brake on. • Bypass valve on pump open. • Drive belt for the transmission gears slack or has come off. • Air in hydraulic system. Mower deck not engaging. • Drive belt for the mower deck has come loose. • Contact for the electromagnetic coupling has loosened. • The blade switch is faulty or has come loose, from the cable contact. • The fuse has blown. Hydraulic drive leaks oil. • Damaged seals, housing, or gaskets. • Air trapped in hydraulic system. Uneven mowing results. • Unequal tire pressure on the left and right sides. • Bent blades. • Suspension for the mower deck is uneven. • Blades are dull. • Driving speed too high. • The grass is too long. • Grass collected under the mower deck. 49