Engine Maintenance; Servicing The Air Cleaner; Servicing The Engine Oil - Toro 74291 Operator's Manual

Engine Maintenance

Servicing the Air Cleaner

Note: Check the filters more frequently if the operating
conditions are extremely dusty or sandy.
Removing the Filters
1. Disengage the PTO, move the motion control levers
to the neutral locked position, and set the parking
brake.
2. Stop 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 26).
Figure 26
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 (Figure 26).
Note: Avoid knocking the filter into the side of the
body.
6. 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.
7. 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.
4. Air cleaner cover
5. Safety filter
Servicing the Primary Filter
Service Interval: Every 200 hours
• If the primary filter is dirty, bent, or damaged,
replace it.
• Do not clean the primary filter.
Servicing the Safety Filter
Service Interval: Every 600 hours
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 26).
3. Carefully slide the primary filter over the safety filter
(Figure 26).
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 with the side indicated as
up facing upward and secure the latches (Figure 26).

Servicing the Engine Oil

Note: Change the oil more frequently when the
operating conditions are extremely dusty or sandy.
Oil Type: Detergent oil (API service SG, SH, SJ or
higher)
Crankcase Capacity: w/filter, 67 oz. (2 l)
Viscosity: See the table below.
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