Cleaning The Cooling System; Servicing The Air Cleaner - Toro 74179 Operator's Manual

Installing the Blades
1. Install the blade onto the spindle shaft (Fig. 27).
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. 27). Torque the blade bolt to 85–110 ft.-lb.
(115–150 N m).

Cleaning the Cooling System

Clean the air intake screen from grass and debris before
each use.
Clean the cooling fins and engine shrouds every 300 hours
or yearly, which ever comes first.
1. Stop the engine, set the parking brake, remove the key,
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove the air intake screen, air cleaner cover, fan
housing, and bolts (Fig. 30).
3. Clean debris and grass from the engine shrouds and
cooling fins.
4. Reinstall the air intake screen, air cleaner cover, fan
housing, and bolts (Fig. 30). Torque the bolts to
4.3 ft.-lb. (5.8 N m).
1
5
3
Figure 30
1. Air intake screen
2. Fan housing
3. Air cleaner cover
4
5
2
6
5
m–4369
4. M6 x 10mm bolt
5. M6 x 12m bolt
6. M6 x 20mm bolt
29

Servicing the Air Cleaner

Foam Element: Clean and oil after every 25 operating
hours.
Paper Element: Clean after every 100 operating hours.
Replace after every 300 operating hours or yearly,
whichever comes first.
Note: Service the air cleaner more frequently (every few
hours) if operating conditions are extremely dusty or sandy.
Removing the Foam and Paper Elements
1. Disengage the power take off (PTO), set the parking
brake, stop the engine, and remove the key.
2. Clean around the air cleaner to prevent dirt from getting
into the engine and causing damage. Remove the cover
nuts and cover (Fig. 31).
3. Remove the wing nuts and air cleaner elements
(Fig. 31).
1
Ó Ó Ó Ó Ó Ó Ó Ó
4
Ó Ó Ó Ó Ó Ó Ó Ó
2
Ó Ó Ó Ó Ó Ó Ó Ó
3
Ó Ó Ó Ó
Figure 31
1. Cover nuts
2. Foam element
3. Paper element
4. Carefully remove the foam element from the paper
element (Fig. 31).
6
5
m–4366
4. Wing nut
5. Air cleaner base
6. Cover