Toro ProLine Hydro 17 HP Operator's Manual page 51

PROBLEM
Machine moves slowly in neutral.
Machine drive is too aggressive.
Mower lifts when drive is engaged.
Abnormal vibration.
Uneven cutting height. g g
Blades do not rotate.
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POSSIBLE CAUSES
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.
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 bent.
1. Blade(s) not sharp.
2. Cutting blade(s) is/are bent.
3. Mower is not level.
4. Underside of mower is dirty.
5. Tire pressure is incorrect.
6. Blade spindle bent.
1. PTO Drive belt is worn, loose
or broken.
2. PTO Drive belt is off pulley.
3. Deck belt is worn, loose or
broken.
4. Deck belt is off pulley.
51
CORRECTIVE ACTION
1. Adjust hydro pump neutral.
2. Replace return spring.
3. Clean and lubricate linkage.
Replace bent or worn parts.
1. Adjust by-pass valve
1. Install new cutting blade(s).
2. Tighten blade mounting bolt.
3. Tighten engine mounting bolts.
4. Tighten the appropriate pulley.
5. Contact Authorized Service
Dealer.
6. Contact Authorized Service
Dealer.
1. Sharpen blade(s).
2. Install new cutting blade(s).
3. Level mower from side-to-side
and front-to-rear.
4. Clean the underside of the
mower.
5. Adjust tire pressure.
6. Contact Authorized Service
Dealer.
1. Install new drive belt.
2. Install drive belt and check
adjusting shafts and belt guides
for correct position.
3. Install new deck belt.
4. Install deck pulley and check
the idler pulley, idler arm and
spring for correct position and
function.