Alamo Bush Hog HDC-3 Series Operator's Manual page 91

PROBLEM
CAUSE
ENGINE WILL NOT START
Battery Dead
PTO Switch Engaged
Steering Levers not in Neutral Lock Position
Parking Brake Not Set
Contamination in Carburetor or Fuel Line
Clogged Fuel Filter
Ignition System Faulty
STARTER DOES NOT TURN OVER
Dead Battery
Poor contact of the battery cable connection
Blown Fuse
Faulty Starter
Parking Brake not set.
Steering Levers not in the Neutral Lock position.
Clutch is engaged.
BATTERY NOT CHARGING
Poor contact of the battery cable connection
Charging Lead Disconnected
Faulty engine charging system
ENGINE RUNS ROUGH
Faulty Carburetor
Clogged Fuel Filter
Water in fuel
Fuel tank near empty
Rich Fuel mixture or fuel air mixture
Wrong type fuel
Clogged air filter
Fouled Spark Plug
Clogged ventilation valve fuel cap
Clogged Spark Arrestor
ENGINE POWER IS WEAK
Clogged Air Filter
Fouled Spark Plugs
Carburetor out of adjustment
Air trapped in hydraulic system
Clogged Spark Arrestor
MACHINE VIBRATES
Loose Blade or Blades
Blades not balanced
Engine mount bolts loose
HDC-3 ZT 05/19
© 2019 Alamo Group Inc.
TROUBLE SHOOTING
Trouble Shooting Section 8-1
PROBLEM
CAUSE
ENGINE OVERHEATS
Clogged air intakes or cooling fins
Engine overloaded
Low Oil
Contamination in fuel line
Fouled Spark Plugs
MACHINE MOVES SLOW, UNEVEN, NOT AT ALL
Park Brake engaged
Bypass linkage engaged
Pump Belt for tranmissions loose or has come off
Air in hydraulic system
MOWER DECK NOT ENGAGING
Drive Belt has come off
Mower Belt tension needs adjusting
Faulty electromagnetic clutch
Connection to clutch is loose or off
Faulty PTO switch
Blown Fuse
TRANSAXLE LEAKING OIL
Damaged seals, housing or gaskets
Air trapped in hydraulic system
UNEVEN MOWING
Air pressure not equal in all tires
Bent blade or blades
Mower Deck not adjusted level
Blades are dull
Driving speed to fast
Grass too high
Grass build up under Zero Turn Mower deck