Toro 25500 Operator's Manual page 51

a side block-off plug can allow debris to enter the fuel
system and damage fuel system components.
Important: If possible, pre-fill new primary- and
secondary-fuel filters with clean fuel prior to assembly
using the clean side block-off plug packed with the filter.
Do not pour fuel directly into the center of the filter,
because this will allow unfiltered fuel to enter the system
and may damage the fuel system components.
Note: You must prime the system after you install the fuel
filters.
1. Wipe clean the sealing surfaces of the filter adapters
for the primary- and secondary-fuel filters
and Figure 74).
2. Lubricate the seals for the fuel filters with clean engine
oil.
3. Install the primary-fuel filter onto the filter adapter,
and tighten the filter until the gasket contacts the filter
head surface (Figure
4. Tighten the fuel filter an additional 3/4 turn after
contact.
Important: Do not overtighten the fuel filter.
5. Connect the wiring harness to the water-in-fuel sensor.
6. Install the secondary-fuel filter onto the filter adapter,
and tighten the filter until the gasket contacts the filter
head surface (Figure
7. Tighten the fuel filter an additional 3/4 turn after
contact.
Important: Do not overtighten the fuel filter.
8. Bleed the air from the fuel system by priming the
system; refer to Priming the Fuel System (page
Priming the Fuel System
WARNING
The fuel system is under high pressure. Bleeding
the system without proper precautions and training
could result in injury to you from injected fluid or
fire or explosion.
• Do not loosen any fittings while the engine is
running.
• Read the engine owner's manual for the proper
bleeding procedure or contact your Authorized
Toro Service Dealer.
Prime the fuel system to remove air from the system after the
following events:
•
The engine has run until the fuel tank is empty.
•
The fuel filters are replaced.
•
Parts of the fuel system are removed for repair.
1. Ensure that there is fuel in the fuel tank.
(Figure 73
73).
74).
2. Rotate the battery-disconnect switch clockwise to the
On position; refer to
20).
3. Clean the fuel-pump head and the priming pump using
a quick-dry spray cleaner and compressed air
75).
1. Priming-pump handle
2. Fuel-pump head
4. Unlock the priming-pump handle by turning it
counterclockwise
5. Pump the primer handle
resistance and the handle cannot be pumped anymore
51).
(approximately 140 to 150 strokes for dry filters or 20
to 60 strokes for pre-filled filters).
6. Lock the manual priming pump handle by turning it
clockwise until it is fully seated
7. Start the engine; refer to
33).
Important: Do not engage the starter motor for
more than 10 seconds at a time. Allow 2 minutes
between cranking intervals.
Note: If the engine does not start after priming the
fuel system and making several attempts to start the
engine, bleed the high-pressure fuel lines; refer to your
engine owner's manual or contact your Authorized
Toro Service Dealer for assistance.
8. If the engine does not start, pump the priming pump
and repeat steps
Note: When the engine starts, it may run erratically
and louder than normal for a few minutes. This is
normal, as air is being purged from the system.
9. Operate the engine until it runs smoothly, then check
for any leaks.
51
Battery-Disconnect Switch (page
Figure 75
3. Fuel/water separator
(Figure 75).
(Figure 75) until you feel
(Figure 75).
Operating the Engine (page
4 through 7 until the engine starts.
(Figure