Toro 74191 Operator's Manual page 56

Maintenance
Figure 57
1. Cutting edge
1. Install the blade onto the blade retainer and
secure with retainer bolt, spacer and washer
(Fig. 53).
IMPORTANT: The curved part of the blade,
the sail, must be pointing upward toward the
top of the mower to ensure proper cutting.
2. Install the blade shear bolts and locknuts
(Fig. 53).
3. Torque blade shear bolts to 80–90 in-lb
(9–10.2 N m).
4. Torque the retainer bolt to 85–110 ft-lb
(115–140 N m).
1
3
4
7
Figure 58
1. Spindle
2. Key
3. Blade retainer
4. Blade
5. Sail Area of Blade
54
1
m–3372
2
10
5
9
8
6
6. Retainer bolt
7. Spacer
8. Washer
9. Shear Bolt
10. Locknut
Sharpening the Blades
1. Use a file to sharpen the cutting edge at both
ends of the blade (Fig. 59). Maintain the original
angle. The blade retains its balance if the same
amount of material is removed from both cutting
edges.
1
Figure 59
1. Sharpen at original angle
2. Check the balance of the blade by putting it on a
blade balancer (Fig. 60). 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. 53).
Repeat this procedure until the blade is balanced.
1
Figure 60
1. Blade
m–1854
2
m–1855
2. Balancer