Toro 74805 Operator's Manual page 32

The plunger inside the gauge canister will change to red
when the air cleaner element becomes dirty and restricted.
When it changes red, air cleaner maintenance is required.
1. Start by visually checking the condition of the primary
element. If the element is visually dirty, replace the
primary element. Do not attempt to clean it.
2. Reset the gauge by depressing the button in the bottom
of the canister until the plunger returns to the lowest
point (Fig. 53).
3. Test run the engine and recheck the gauge. If the
plunger remains in the lowest range, normal operation
can resume. If the plunger returns to the "Change
Filter" level, the primary element is restricted and must
be replaced, even though it may not appear to be dirty.
4. The gauge may be reset at any time, however it will
return to the prior position if corrective filter servicing
has not been performed.
1
Figure 53
1. Filter minder
Removing the Filter
1. Disengage the power take off (PTO), set the parking
brake, and turn the ignition key to off. Remove the key.
2. Remove the wing nut from the bolt in the air filter
guard. Rotate guard to gain access to filter (Fig. 54).
2
M–4824
2. Button (push to reset)
32
4
Figure 54
1. Filter guard
2. Wing nut
3. Release the latches on the air cleaner and pull the air
cleaner cover off of the air cleaner body (Fig. 55).
4. Clean the inside of the air cleaner cover with
compressed air.
5. Gently slide the primary filter out of the air cleaner
body (Fig. 55). Avoid knocking the filter into the side of
the body. Do not remove the safety filter, unless you
intend to replace it as well.
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, otherwise clean 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.
5
2
m–4387
Figure 55
1. Latches
2. Air cleaner cover
3. Air filter body
1
2 3
m–4845
3. Bolt
4. Filter
4
3 1
1
4. Primary filter
5. Safety filter