Servicing The Air Cleaner - Toro 74177 Operator's Manual

Installing the Blades
1. Install the blade onto the spindle shaft (Fig. 31).
Important
The curved part of the blade must be
pointing upward toward the inside of the mower to ensure
proper cutting.
2. Install the flat washer, lock washer, and blade bolt
(Fig. 31). Torque the blade bolt to 85–110 ft–lb
(115–150 N m).

Servicing the Air Cleaner

Primary Filter: Check and/or replace after every 200
operating hours or more often in dusty conditions.
Safety Filter: Replace after every 600 operating hours.
Note: Check the filters more frequently if operating
conditions are extremely dusty or sandy.
Removing the Filters
1. Disengage the power take off (PTO), set the parking
brake, and turn the ignition key to off. Remove the key.
Remove spark plug wire(s).
2. Release the latches on the air cleaner and pull the air
cleaner cover off of the air cleaner body (Fig. 34).
3. Clean the inside of the air cleaner cover with
compressed air.
4. Gently slide the primary filter out of the air cleaner
body (Fig. 34). Avoid knocking the filter into the side of
the body.
5. 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
and you should replace both filters.
6. 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.
5
1. Latches
2. Air cleaner cover
3. Air filter body
Servicing the Primary Filter
Check and/or replace it after 200 operating hours.
If the primary filter is dirty, bent, or damaged then replace
the filter.
Do not clean the primary filter.
Servicing the Safety Filter
Replace it after 600 operating hours.
Important
Never attempt to clean the safety filter. If
the safety filter is dirty, then the primary filter is damaged
and you should 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 (Fig. 34).
3. Carefully slide the primary filter over the safety filter
(Fig. 34). Ensure that it is fully seated by pushing on the
outer rim of the filter 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 up and secure the latches (Fig. 34).
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3
4
1
2
1
m–4815
Figure 34
4. Primary filter
5. Safety filter