Buhler 435, 485, 535 manual 198

		5-
		Section 5 - Troubleshooting
		Engine
Engine
Problem	Possible Cause	Correction
Engine knocks	Low oil level.	Add correct grade and amount of oil.
	Low oil pressure.	Contact Buhler Versatile dealer.
	Engine overheated.	See “Engine Overheats” (later in this
		chart).
Low engine operating	Engine temperature gauge faulty.	Contact Buhler Versatile dealer.
temperature	Malfunctioning thermostat(s).	Contact Buhler Versatile dealer.
	Tractor used on very light loads.	Contact Buhler Versatile dealer.
Low oil pressure	Low oil level.	Add oil as required.
	Oil pressure gauge faulty.	Contact Buhler Versatile dealer.
	Wrong grade or viscosity oil.	Drain and refill with correct grade
		and viscosity oil.
	Engine component failure.	Contact Buhler Versatile dealer.
Excessive oil	Engine oil level too high.	Reduce oil level.
consumption	Incorrect viscosity oil.	Use correct viscosity.
	External oil leaks.	Contact Buhler Versatile dealer.
	Plugged breather tube vent filter.	Contact Buhler Versatile dealer.
	Engine component failure.	Contact Buhler Versatile dealer.
Engine overheats	Restricted cooling system fins.	Clean radiator, cooler and front grill.
	Excessive engine load.	Shift to a lower gear or reduce load.
	Low engine oil level.	Add oil as required.
	Low coolant level.	Fill cooling system. Check for leaks.
	Faulty radiator cap.	Replace cap.
	Loose or worn fan belt.	Check automatic tensioner. Replace
		belt if worn.
	Cooling system plugged.	Flush cooling system.
	Malfunctioning thermostat(s).	Contact Buhler Versatile dealer.
	Hose connection leaking.	Tighten hose connection.
	Malfunctioning temperature gauge.	Contact Buhler Versatile dealer.
Air filter restricted	Clogged air filter.	Clean or replace filter.
		Contact Buhler Versatile dealer.
	Aspirator malfunction.

435/485/535