Engine Maintenance; Engine Safety; Servicing The Engine - Toro 74480 Operator's Manual

Engine Maintenance

Engine Safety

•
Shut off the engine before checking the oil or
adding oil to the crankcase.
•
Keep your hands, feet, face, clothing, and other
body parts away the muffler and other hot surfaces.

Servicing the Engine

Important:
Refer to your engine owner's manual
for additional maintenance procedures.
Figure 38
Servicing the Air Cleaner
Service Interval: Every 250 hours—Replace the
primary air filter (more often in dirty
or dusty conditions).
Every 250 hours—Check the safety air filter
(more often in dirty or dusty conditions).
Every 500 hours—Replace the safety air filter
(more often in dirty or dusty conditions).
Note:
Service the air cleaner more frequently if
operating conditions are extremely dirty or dusty.
Removing the Filters
1. Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Release the latches on the air cleaner and pull
the air-cleaner cover off the air-cleaner body
(Figure 39).
1. Air-cleaner body
2. Primary filter
3. Latch
4. Clean the inside of the air-cleaner cover with
compressed air.
5. Gently slide the primary filter out of the
air-cleaner body
Note:
Avoid knocking the filter into the side of
the body.
6. Remove the safety filter only to replace it.
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Inspecting the Filters
1. Inspect the safety filter. If it is dirty, replace both
the safety and primary filters.
Important:
safety filter. If the safety filter is dirty, then
the primary filter is damaged.
2. Inspect the primary filter for damage by looking
into the filter while shining a bright light on the
outside of the filter. If the primary filter is dirty,
bent, or damaged, replace it.
Note:
Holes in the filter appear as bright spots.
Do not clean the primary filter.
Installing the Filters
Important:
To prevent engine damage, always
operate the engine with both air filters and the
cover installed.
1. If you are installing new filters, check each filter
for shipping damage.
Note:
Do not use a damaged filter.
2. If you are replacing the inner filter, carefully slide
it into the filter body
3. Carefully slide the primary filter over the safety
filter (Figure
39
Figure 39
4. Air-cleaner cover
5. Safety filter
(Figure 39).
Do not attempt to clean the
(Figure 39).
39).
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