Cleaning The Cooling System - Toro 74411 Operator's Manual

Sharpening the Blades
Warning
When you sharpen the blade, pieces of the blade
could be thrown and cause serious injury.
Wear proper eye protection when you sharpen the
blade.
1. Use a file to sharpen the cutting edge at both ends of the
blade at the original angle (Fig. 27).
1
Figure 27
1. Sharpen at original angle
Note: The blade retains its balance if the same amount
of material is removed from both cutting edges.
2. Check the balance of the blade by putting it on a blade
balancer (Fig. 28). If the blade stays in a horizontal
position, the blade is balanced and can be used. If the
blade is not balanced, file some metal off the end of the
sail area only (Fig. 26). Repeat this procedure until the
blade is balanced.
1
Figure 28
1. Blade
Installing the Blades
1. Install the blade onto the spindle shaft (Fig. 26).
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. 26).
Note: Torque the blade bolt to 85–110 ft-lb
(115–150 N m).
m–1854
2
m–1855
2. Balancer
28

Cleaning the Cooling System

Clean the air intake screen from grass and debris before
each use.
Check and clean the cooling fins and the engine shrouds
every 100 hours or yearly, which ever comes first.
1. Disengage the PTO 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. Remove the air intake screen, recoil starter, and fan
housing (Fig. 29).
3
1
Figure 29
1. Air intake screen
2. Fan housing
3. Recoil starter
4. Clean the debris and grass from the engine parts.
5. Install the air intake screen, recoil starter, and fan
housing.
5
2
4
m-7450
4. Bolt
5. Nut