Checking The Spark Arrester; Fuel System Maintenance; Servicing The Electronic Fuel Injection System; Replacing The Low-Pressure Fuel Filter - Toro 74904 Operator's Manual

Checking the Spark Arrester

For a Model with a Spark Arrester
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
gasoline vapors even after the engine is stopped.
Hot particles exhausted during engine operation
may ignite flammable materials. Fire may result in
personal injury or property damage.
Do not fuel or run the engine unless the spark
arrester is installed.
1. Shut off the engine, wait for all moving parts to stop,
remove the key, and engage the parking brake.
2. Wait for the muffler to cool.
3. If there are any breaks in the screen or welds, replace
the arrester.
4. If the screen is plugged, remove the arrester and shake
loose particles out of the arrester, and clean the screen
with a wire brush (soak in solvent if necessary).
5. Install the arrester on the exhaust outlet.
Fuel System
Maintenance
WARNING
Fuel system components are under high pressure.
The use of improper components can result in
system failure, gasoline leakage, and possible
explosion.
Use only approved fuel lines and fuel filters.
Servicing the Electronic Fuel
Injection System
This machine contains an electronic fuel injection (EFI)
system. It controls the fuel flow under different operating
conditions.
The electronic control unit (ECU) continuously monitors the
operation of the EFI system.
If a problem or fault within the system is detected, the
malfunction-indicator light (MIL) is illuminated. The MIL is
the red light located in the right console panel.
Once the MIL illuminates, initial trouble shooting
checks should be made. Refer to the MIL section under
Troubleshooting (page
If these checks do not correct the problem, further diagnosis
and servicing by an Authorized Service Dealer is necessary.
Replacing the Low-Pressure
Fuel Filter
Service Interval: Every 200 hours (more often in dirty or
dusty conditions).
The fuel filter is located near the engine on the front or rear
side of the engine.
1. Disengage the PTO, move the motion-control levers
to the N
EUTRAL
brake.
2. Shut off the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Allow the machine to cool down.
4. Close the fuel-shutoff valve under the seat
42
66).
-L position, and set the parking
OCK
(Figure 57).