Toro 74251 Operator's Manual page 59

Problem
Engine overheats.
Machine does not drive.
Abnormal vibration.
Possible Cause
1. More coolant is needed.
2. Air intake screens are
dirty.
3. Restricted airow into
the engine.
4. Radiator ns are dirty.
5. The engine oil level is
incorrect.
6. Fuel mixture is lean.
7. Engine load is excessive.
1. Tension spring not
connected.
2. By pass valve is not
closed tight.
3. Traction belt is worn,
loose or broken.
4. Traction belt is off a
pulley.
5. Hydraulic uid level is
low or too hot.
1. Cutting blade(s) is/are
bent or unbalanced.
2. Blade mounting bolt is
loose.
3. Engine mounting bolts
are loose.
4. Loose engine pulley,
idler pulley, or blade
pulley.
5. Engine pulley is
damaged.
6. Blade spindle is bent.
59
Corrective Action
1. Check and add coolant.
2. Clean with every use.
3. Inspect and clean the
radiator screen with
every use.
4. Clean the radiator ns.
5. Fill or drain to the full
mark.
6. Contact your Authorized
Service Dealer.
7. Reduce the ground
speed.
1. Connect the tension
spring.
2. Tighten the by pass
valve.
3. Contact an Authorized
Service Dealer.
4. Contact an Authorized
Service Dealer.
5. Add hydraulic uid to
reservoir or let it cool
down.
1. Install new cutting
blade(s).
2. Tighten the blade
mounting bolt.
3. Tighten the engine
mounting bolts.
4. Tighten the appropriate
pulley.
5. Contact an Authorized
Service Dealer.
6. Contact an Authorized
Service Dealer.