Toro 70171 - Page 49

Troubleshooting
47
PROBLEM CORRECTIVE ACTIONPOSSIBLE CAUSES
Blade does not rotate 1. Blade drive belt is worn, loose
bk
1. Install new blade drive belt.
or broken.
2 Blade drive belt is off pulley
2 Install blade drive belt and
2. Blade drive belt is off pulley. 2. Install blade drive belt and
check idler
p
ulle
y
and belt
check
idler
pulley
and
belt
guides for correct position.
Engine loses power.
1. Engine load is excessive. 1. Reduce ground speed.
2. Air cleaner is dirty. 2. Clean air cleaner element.
3. Oil level in crankcase is low. 3. Add oil to crankcase.
4. Cooling fins and air passages
under engine blower housing
are plugged.
4. Remove obstruction from
cooling fins and air passages.
5. Spark plug is pitted, fouled, or
gap is incorrect.
5. Install new, correctly gapped
spark plug.
6. Vent hole in fuel cap is
plugged.
6. Clean or replace the fuel cap.
7. Carburetor is adjusted
incorrectly.
7. Adjust the carburetor.
8. Dirt, water, or stale fuel is in
fuel system.
8. Contact Authorized Service
Dealer.
Engine overheats. 1. Engine load is excessive.
2 Oil level in crankcase is low
1. Reduce ground speed.
2 Add oil to crankcase
2
.
Oil
l
eve
l
i
n cran
k
case
i
s
l
ow.
3. Cooling fins and air passages
under engine blower housing
2
.
Add
o
il
t
o cran
k
case.
3. Remove obstruction from
cooling fins and air passages
under engine blower housing
are plugged.
Cb i dj d
cooling fins and air passages.
Adj h b
4. Carburetor is adjusted
incorrectly.
4. Adjust the carburetor.
Abnormal vibration. 1. Engine mounting bolts are
loose.
1. Tighten engine mounting
bolts.
2. Loose engine pulley, idler
pulley, or blade pulley.
2. Tighten the appropriate
pulley.
CS
3. Engine pulley is damaged.
4 Cutter blade is unbalanced
3. Contact Authorized Service
Dealer.
4 Install new cutter blade
4. Cutter blade is unbalanced,
bent or loose.
5 Blade bolt is loose
4. Install new cutter blade.
5 Tighten bolt to 45
–
60 ft
–
lb
5
.
Blade
bolt
is
loose
.
6. Drive belt is dama
g
ed.
5
.
Tighten
bolt
to
45
–
60
ft
–
lb
(61–81 N–m).
6. Install blade drive belt and
6
.
Drive
belt
is
damaged
.
6
.
Install
blade
drive
belt
and
check idler pulley and belt
guides for correct position.