Husqvarna 966553901 - Manual (Page 55)

TROUBLESHOOTING
55
Problem Cause
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
• Contamination in the carburetor or fuel line.
• Fouled spark plugs
Battery not charging • Poor contact of the battery terminal cable connections
• Charging lead is disconnected
The machine moves slowly, unevenly, or not at all • Parking brake on
• Bypass valve on pump open
• Drive belt for the transmission slack or has come off
• Air trapped in hydraulic system
Mower deck not engaging • Drive belt for the mower deck has come loose
• Contact for the electromagnetic coupling has loosened
• Blade switch is faulty or has come loose from cable
contact
• Blown fuse
Transaxle leaks oil • Damaged seals, housing, or gaskets
• Air trapped in hydraulic system
Uneven mowing results • Different air pressure in tires on the left and right sides.
• Bent blades
• Suspending for the mower deck is uneven
• Blades are dull
• Driving speed too high
• Grass is too long
• Grass collected under the mower deck