Engine Cooling System - Toro 03706 Operator's Manual

Figure 33
1. Fuel filter mounting head
2. Filter bowl
2. Remove the filter bowl and clean mounting surface.
3. Remove filter from bowl and replace with new filter.
4. Install filter bowl by hand until O-ring contacts
mounting surface.
Replacing the Fuel Pre-Filter
(Machines with serial numbers 230000201 and up)
Replace the fuel pre-filter (Fig. 34), located between fuel
the tank and fuel pump, after every 400 operating hours or
yearly, whichever occurs first.
1. Clamp both fuel lines that connect to the fuel filter so
that fuel cannot drain when the lines are removed.
2. Loosen the hose clamps at both ends of the filter and
pull the fuel lines off of the filter.
Figure 34
1. Fuel pre-filter
3. Slide the hose clamps onto the ends of the fuel lines.
Push the fuel lines onto the fuel filter and secure them
with the hose clamps. Be sure that the arrow on the side
of the filter points toward the injection pump.
1
3
4
2
3. Filter
4. O–ring
1
31
Bleeding Air From Injectors
Note: This procedure should be used only if fuel system
has been purged of air through normal priming procedures
and engine will not start; refer to Bleeding Fuel System.
1. Loosen the pipe connection to the No. 1 nozzle and
holder assembly.
Figure 35
1. Fuel injector (4)
2. Move throttle to FAST position.
3. Turn key in key switch to START position and watch
fuel flow around connector. Engine will crank. Turn key
to OFF position when solid flow is observed.
4. Tighten pipe connector securely.
5. Repeat steps on remaining nozzles.

Engine Cooling System

Removing Debris
Remove debris from oil cooler, radiator and rear screen
daily, clean more frequently in dirty conditions.
1. Turn engine off, release front engine cover latches and
raise engine cover. Clean engine area thoroughly of all
debris.
2. Remove knobs securing rear screen to frame and
remove screen (Fig. 36).
1