Yazoo/Kees ZPKW5426 manual troubleshooting guide, Problem, Cause

troubleshooting guide

	Problem	Cause
Machine vibrates.		•	Blades are loose.
		• Blades are incorrectly balanced.
		•	Engine is loose.
Engine overheats.		•	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.		•	Poor contact with battery terminal cable
			connectors.
		• Charging lead is disconnected.
		• Fault in engine charging system.
Machine moves slowly, unevenly, or not at all.		•	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.

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