Check Air Filter, Dust Cup, & Burp Valve; Muffler Removal; Muffler Installation - Toro Groundsmaster 3500 30807 Service Manual

Check Air Filter, Dust Cup, & Burp Valve
The air cleaner body, air filter, dust cup, and burp valve
should be checked daily, prior to operation.
IMPORTANT: Any leaks in the air cleaner system
will cause serious engine damage. Make sure that
all air cleaner components are in good condition
and are properly secured during operation.
1. Park machine on a level surface, lower cutting units,
stop engine, engage parking brake, and remove key
from the ignition switch. Unlatch and raise hood.
2. Check air cleaner body for damage that could cause
possible air leaks. Make sure dust cup seals completely
to the air cleaner body (Fig. 5).
3. Check burp valve and dust cup for damage.
4. Make sure air hoses connecting the air cleaner to the
engine and radiator are secured tightly and free of pos-
sible air leaks.
3
Figure 5
1. Latch
2. Dust cup
Muffler
To meet gasoline engine emission requirements, the
Kubota engine used on your Groundsmaster has a cata-
lytic muffler. In addition to providing sound damping and
spark arresting, the muffler also includes a three way
catalyst to treat the exhaust gases which are created
from the combustion process. The three-way catalyst
consists of a honeycomb core coated with a mixture of
precious metals. The hot exhaust gases flow through
the catalyst where oxidation and reduction reactions
Groundsmaster 3500−G
2
1
3. Burp valve
Page 4 − 7
take place. These chemical reactions reduce the
amount of CO, HC and NO
x
gen sensors are included in the exhaust system and are
used as inputs for the engine ECU to monitor exhaust
system operation. The exhaust exits the catalytic
muffler through the tailpipe outlet.
Muffler Removal (Fig. 4)
CAUTION
The muffler and exhaust pipe may be hot. To
avoid burns, allow the engine and exhaust sys-
tem to cool before working on the muffler.
1. Park machine on a level surface, lower cutting units,
stop engine, engage parking brake, and remove key
from the ignition switch.
2. Open engine hood to gain access to engine.
3. Remove exhaust guard from frame.
4. Remove both flange head nuts and screws securing
the muffler bracket to the hydraulic pump support.
5. Remove four flange head nuts and screws securing
the muffler flange to the muffler mount tube. Separate
muffler flange from the mount tube. Remove muffler as-
sembly from the machine.
6. Remove exhaust gasket. Replace gasket if dam-
aged or torn.
Muffler Installation (Fig. 4)
NOTE: Make sure muffler flange and muffler mount
tube sealing surfaces are free of debris or damage that
may prevent a tight seal.
1. Hold the exhaust gasket on the muffler flange and
position the muffler assembly to the muffler mount tube
with four flange head screws and nuts.
IMPORTANT: Finger tighten all fasteners before se-
curing the muffler bracket to the pump support so
there is no preload on the muffler mount tube.
2. Position muffler bracket to the hydraulic pump sup-
port with both flange head screws and nuts.
3. Torque muffler flange nuts from 22 to 28 ft−lb (30 to
38 N−m and then muffler bracket screws and nuts.
NOTE: If oxygen sensor was removed, torque sensor
from 30 to 44 ft−lb (41 to 59 N−m).
4. Install exhaust guard to frame.
5. Close and latch engine hood.
in the exhaust. Two (2) oxy-
Kubota Gasoline Engine