Exmark 4500-497 manual Troubleshooting

Troubleshooting

Problem		Possible Cause		Corrective Action
Engine overheats	1.	Engine load is excessive	1.	Reduce the ground speed.
	2.	Oil level in the crankcase is low.	2.	Add oil to the crankcase.
	3.	Cooling fins and air passages for the	3.	Remove the obstructions from the cooling
		engine are plugged.		fins and air passages.
Mower pulls left or right (with levers fully	1.	Tracking needs adjustment	1.	Adjust the tracking.
forward)	2.	Tire pressure in drive tires not correct.	2.	Adjust tire pressure in the drive tires.
	3.	Reverse indicator and motion control	3.	Adjust the reverse indicator and the
		linkage need adjustment.		motion control linkage.
Machine does not drive	1.	Bypass valve is not closed tight.	1.	Tighten the bypass valve.
	2.	Drive or pump belt is worn, loose or	2.	Change the belt.
		broken.
	3.	Drive or pump belt is off a pulley.	3.	Change the belt.
	4.	Broken or missing idler spring.	4.	Replace the spring.
	5.	Hydraulic fluid level is low or too hot.	5.	Add hydraulic fluid to reservoir or let it
				cool down.
Abnormal vibration	1.	Engine mounting bolts are loose.	1.	Tighten the engine mounting bolts.
	2.	Loose engine pulley, idler pulley, or blade	2.	Tighten the appropriate pulley.
		pulley.
	3.	Engine pulley is damaged.	3.	Contact an Authorized Service Dealer.
Clutch will not engage.	1.	Fuse is blown.	1.	Replace fuse. Check coil resistance,
				battery charge, charging system, and
				wiring connections and replace if
				necessary.
	2.	Low voltage supply at the clutch.	2.	Check coil resistance, battery charge,
				charging system, and wiring connections
				and replace if necessary.
	3.	Damaged coil.	3.	Replace clutch.
	4.	Inadequate current supply.	4.	Repair or replace clutch lead wire or
				electrical system. Clean connector
				contacts.
	5.	Rotor/armature airgap is too large.	5.	Remove shim or replace clutch.

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