Adjusting The Front-To-Rear Blade Slope - Toro 74603 Operator's Manual

Adjusting the Front-to-Rear
Blade Slope
Check the front-to-rear blade level any time you
install the mower. If the front of the mower is
more than 5/16 inch (7.9 mm) lower than the
rear of the mower, adjust the blade level using the
following instructions:
1. Position the mower on a flat surface.
2. Disengage the blade control switch and move
the control levers to the neutral locked position
and apply the parking brake.
3. Stop the engine, remove the key, and wait for
all moving parts to stop before leaving the
operating position.
4. Check the air pressure of all four tires. If
needed, adjust to the recommended inflation;
refer to Tire Pressure.
5. Check and adjust the side-to-side blade level
if you have not checked the setting; refer to
Leveling the Mower from Side-to-Side.
6. Measure the length of the rear trunion rod
(Figure 43). If the rod length is not 11-1/2 inch
(29.2 cm), remove the clevis pin and cotter
pin from the end of the rod (Figure 43),
loosen the jam nut, and turn the yoke until the
11-1/2 inch (29.3 cm) dimension is obtained.
7. Then secure the yoke with the clevis pin and
cotter pin. Repeat this procedure on the
opposite side of the mower.
Figure 43
1. Rear trunion rod
2. Clevis pin and cotter pin
8. Set the height-of-cut at 3 inch (76 mm) and
carefully rotate the blades so they are facing
front to rear (Figure 44).
9. Measure between the tip of the front blade
(Figure 44) and the tip of the rear blade to
3. Jam nut
4. Yoke
the flat surface. If the front blade tip is not
1/16-5/16 inch (1.6-7.9 mm) lower than the
rear blade tip, adjust the front trunion rods.
Figure 44
1. Blade front to rear
2. Measure front blade tip
10. To adjust the front-to-rear blade slope, remove
the hairpin cotter from the front trunion yokes
and loosen the jam nuts (Figure 45).
Figure 45
1. Front trunion rod yoke
2. Hairpin cotter
11. Rotate the yokes on the rods to change the
adjustment (Figure 45). To raise the front
of the mower, tighten the yokes (shorten the
rods). To lower the front of the mower, loosen
the yokes (lengthen the rods).
12. After adjusting both trunion rod yokes evenly,
secure the yokes with the hairpin cotters.
Check the front-to-rear level again. Continue
adjusting the yokes until the front blade tip is
1/16-5/16 inch (1.6-7.9 mm) lower than the
rear blade tip (Figure 44).
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3. Measure rear blade tip
4. Measure here
3. Jam nut