
Troubleshooting
Problem
Possible Cause
Corrective Action
1. The fuel tank is empty or the shutoff
valve is closed.
1. Fill the fuel tank with gasoline and
open the valve
2. The choke is not on.
2. Move the choke lever to the C
HOKE
position.
3. A spark-plug wire is loose or
disconnected.
3. Install the wire on spark plug.
4. A spark plug is pitted, fouled, or the
gap is incorrect.
4. Install a new, correctly gapped spark
plug.
5. The air cleaner is dirty.
5. Service the air cleaner element.
6. Dirt is in the fuel filter.
6. Replace the fuel filter.
7. Dirt, water, or stale fuel is in the fuel
system.
7. Contact an Authorized Service Dealer.
The engine does not start, starts hard, or
fails to keep running.
8. The gap between the safety-interlock
switches is not correct.
8. Contact an Authorized Service Dealer.
1. The engine load is excessive.
1. Reduce the ground speed.
2. The air cleaner is dirty.
2. Service the air cleaner element.
3. The oil level in the crankcase is low.
3. Add oil to the crankcase.
4. The cooling fins and air passages
under the engine blower housing are
plugged.
4. Remove the obstruction from the
cooling fins and air passages.
5. A spark plug is pitted, fouled, or the
gap is incorrect.
5. Install a new, correctly gapped spark
plug.
6. The vent hole in the fuel cap is plugged.
6. Clean or replace the fuel cap.
7. Dirt is in the fuel filter.
7. Replace the fuel filter.
The engine loses power.
8. Dirt, water, or stale fuel is in the fuel
system.
8. Contact an Authorized Service Dealer.
1. Engine load is excessive.
1. Reduce the ground speed.
2. The oil level in the crankcase is low.
2. Add oil to the crankcase.
The engine overheats.
3. Cooling fins and air passages under
the engine blower housing are plugged.
3. Remove the obstruction from the
cooling fins and air passages.
1. The hydraulic-fluid reservoir is low.
1. Add hydraulic fluid to the reservoir.
2. Air is in the hydraulic system.
2. Bleed the air out the hydraulic system.
3. A pump-drive belt slips.
3. Replace the belt.
4. A spring on the pump-drive-belt idler
is missing.
4. Replace the spring.
The machine does not drive.
5. The pump bypass valves are open.
5. Tighten the bypass valves. Torque
them to 12 to 15 N∙m (9 to 11 ft-lb).
1. Cutting blade(s) is/are bent or
unbalanced.
1. Install new cutting blade(s).
2. A blade-mounting bolt is loose.
2. Tighten the blade-mounting bolt.
3. Engine mounting bolts are loose.
3. Tighten the engine-mounting bolts.
4. An engine pulley, idler pulley, or blade
pulley is loose.
4. Tighten the appropriate pulley.
5. An engine pulley is damaged.
5. Contact an Authorized Service Dealer.
There is abnormal vibration.
6. A blade spindle is bent.
6. Contact an Authorized Service Dealer.
57
Summary of Contents for 74504TE
Page 59: ...Schematics Electrical Schematic Rev A 59 ...
Page 60: ...Notes 60 ...
Page 61: ...Notes 61 ...
Page 62: ...Notes 62 ...