Toro Proline 30187 Operator's Manual page 35

PROBLEM
Engine overheats. g
Abnormal vibration.
Machine does not drive.
Machine does not drive up hills or
inclines.
Machine moves slowly in neutral.
Machine drive is too aggressive.
Mower lifts when drive is engaged.
POSSIBLE CAUSES
1. Engine load is excessive.
2. Oil level in crankcase is low.
3. Cooling fins and air passages
under engine blower housing
are plugged.
1. Engine mounting bolts are
loose.
2. Loose engine pulley, idler
pulley, or blade pulley.
3. Engine pulley is damaged.
1. Hydrostatic fluid level low.
2. Traction belt is worn, loose or
broken.
3. Traction belt is off pulley.
1. By-pass valve is adjusted too
far open.
1. Neutral is mis-adjusted.
2. Return spring is broken or
missing.
3. Linkage is dirty or bent.
1. By-pass valve is adjusted too
far closed.
35
CORRECTIVE ACTION
1. Reduce ground speed.
2. Add oil to crankcase.
3. Remove obstruction from
cooling fins and air passages.
1. Tighten engine mounting
bolts.
2. Tighten the appropriate
pulley.
3. Contact Authorized Service
Dealer.
1. Fill hydrostatic fluid tank.
2. Change Belt.
3. Change Belt.
1. Adjust by-pass valve
1. Adjust hydro pump neutral.
2. Replace return spring.
3. Clean and lubricate linkage.
Replace bent or worn parts.
1. Adjust by-pass valve