Checking The Spark Arrester; Fuel System Maintenance; Servicing The Electronic Fuel-Injection System; Replacing The Fuel Filter - Toro 74312 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
fuel vapors even you shut off the engine. Hot
particles exhausted during engine operation
may ignite flammable materials. Fire may
result in personal injury or property damage.
Do not refuel or run the engine unless a spark
arrester is installed.
1. Shut off the engine, wait for all moving parts to
stop, and remove the key. 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 the loose particles out of the arrester
and clean the screen with a wire brush (soak it
in solvent if necessary). 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, fuel 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
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) illuminates. The MIL
is the red light located in the right console panel.
Once the MIL illuminates, make initial troubleshooting
checks. 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 Fuel Filter

Service Interval: Every 200 hours/Yearly (whichever
comes first) (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. Move the speed-control lever to the N
position to stop the machine.
2. Disengage the PTO, engage the parking brake,
shut off the engine, and wait for all moving parts
to stop.
3. Wait for the machine to cool down.
4. Clamp the hose on the fuel tank side of the fuel
filter.
5. Squeeze the ends of the hose clamps together
and slide them away from the filter
38
62).
EUTRAL
(Figure 37).