Servicing The Engine Oil - Toro 74978 Operator's Manual

8. Gently slide the primary filter out of the air cleaner
body (Figure 45).
Note: Avoid knocking the filter into the side of the
body.
9. Remove the safety filter only if you intend to replace it.
Important: Never attempt to clean the safety
filter. If the safety filter is dirty, then the primary
filter is damaged. Replace both filters.
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1. Safety filter
2. Primary filter
3. Air cleaner cover
10. Inspect the primary filter for damage by looking into
the filter while shining a bright light on the outside of
the filter. Holes in the filter will appear as bright spots.
If the filter is damaged, discard it.
Servicing the Primary Filter
•
If the primary filter is dirty, bent, or damaged, replace it.
•
Do not clean the primary filter.
Servicing the Safety Filter
Replace the safety filter, never clean it.
Important: Never attempt to clean the safety filter.
If the safety filter is dirty, then the primary filter is
damaged. Replace both filters.
Installing the Filters
Important: To prevent engine damage, always operate
the engine with both air filters and cover installed.
1. If installing new filters, check each filter for shipping
damage. Do not use a damaged filter.
2. If the safety filter is being replaced, carefully slide it
into the filter body (Figure 45).
2
1
Figure 45
4. Latch
5. Air cleaner body
3. Carefully slide the primary filter over the safety filter
(Figure 45).
Note: Ensure that the primary filter is fully seated by
pushing on its outer rim while installing it.
Important: Do not press on the soft inside area
of the filter.
4. Install the air cleaner cover and secure the latches
(Figure 45).

Servicing the Engine Oil

Engine Oil Type: Detergent oil (API service SG, SH, SJ,
or SL)
Engine Oil Capacity: with a filter change, 77 ounces (2.3 L);
4
without a filter change, 70 ounces (2.1 L)
3
Viscosity: See the table below.
g012997
Note: Use of multi-grade oils (5W-20, 10W-30, or 10W-40)
will increase oil consumption. Check the oil level more
frequently when using them.
Checking the Engine Oil Level
Service Interval: Before each use or daily
Note: Check the oil when the engine is cold.
WARNING
Contact with hot surfaces may cause personal
injury.
Keep hands, feet, face, clothing and other body
parts away from the muffler and other hot surfaces.
Important: Do not overfill the crankcase with oil
because damage to the engine may result. Do not run
engine with oil below the low mark because the engine
may be damaged.
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Figure 46