Toro Z-Master Z153 Operator's Manual page 27

Figure 28
Figure 29
3. Rotate the opposite ends of the blades forward.
Measure from a level surface to the cutting edge of the
blades at the same position as in step 2 above. The
difference between the dimensions obtained in steps 2
and 3 must not exceed 1/8 (3 mm). If this dimension
exceeds 1/8 (3 mm), the blade is bent and must be
replaced; refer to Removing the Blades and Installing
the Blades, page 27.
Warning
A blade that is bent or damaged could break
apart and could seriously injure or kill you or
bystanders.
Always replace bent or damaged blade with a
new blade.
Never file or create sharp notches in the edges
or surfaces of blade.
Removing the Blades
Blades must be replaced if a solid object is hit, if the blade
is out of balance or is bent. To ensure optimum
performance and continued safety conformance of the
machine, use genuine Toro replacement blades.
Replacement blades made by other manufacturers may
result in non-conformance with safety standards.
Hold the blade end using a rag or thickly-padded glove.
Remove the blade bolt, spring disk and blade from the
spindle shaft (Fig. 30).
1
4
m–1078
1. Sail area of blade
2. Blade
Sharpening the Blades
1. Use a file to sharpen the cutting edge at both ends of
the blade (Fig. 31). Maintain the original angle. The
blade retains its balance if the same amount of
material is removed from both cutting edges.
m–2539
2. Check the balance of the blade by putting it on a blade
balancer (Fig. 32). 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. 30). Repeat this procedure until
the blade is balanced.
1
1. Blade
Installing the Blades
1. Install the blade onto the spindle shaft (Fig. 30).
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. 30). Torque the blade bolt to 85–110 ft-lb
(115–150 N m).
27
3
Figure 30
3. Spring disk
4. Blade bolt
1
Figure 31
1. Sharpen at original angle
2
Figure 32
2. Balancer
2
m–1854
m–1855