Toro 74251 Operator's Manual page 52

a measurement of 3-1/8 to 3-1/4 inches
(Figure 68).
Note: It is recommended that both sides of
the mower are adjusted the same distance.
9. Tighten the jam nut under the rear support
arm and tighten the bolt securing the chain to
the rear support arm.
10. Adjust the opposite side if needed.
Figure 68
1. Rear chain
2. Rear support arm
3. Bolt
4. Jam Nut
Adjusting the Front-to-Rear Mower
Pitch
1. Position the right blade front-to-rear
(Figure 69).
2. Measure the right blade at the A location, from
a level surface to the cutting edge of the blade
tip (Figure 69).
5. Adjustment bolt
6. Front swivel
7. Front support arm
Figure 69
1. Measure here from blade
to hard surface
3. Record this measurement.
4. Measure the right blade at the B location, from
a level surface to the cutting edge of the blade
tip (Figure 69).
5. Record this measurement.
6. The mower blade should be a 1/4 to 3/8 inch
(6 to 10 mm) lower at position A than at
position B (Figure 69). If it is not correct,
proceed to the following steps.
Note: Both of the front swivels need to be
adjusted the same amount to maintain equal
chain tension.
7. Loosen the front swivel jam nuts, at the front
of the right and left swivels, approximately a
1/2 inch (13 mm) (Figure 68).
8. Adjust the lift nuts on both the left and the
right side of the machine to achieve 1/4 to
3/8 inch (6 to 10 mm) lower in front at A
than in the rear at B (Figure 68).
9. Tighten both swivel jam nuts against the front
swivel to lock the height.
10. Check to make sure there is equal tension on
the chains and adjust again if needed.
Adjusting the Compression Spring
1. Raise the mower lift lever to the transport
position.
2. Check the distance between the two large
washers, it needs to be 10-1/2 inches (26.7 cm)
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2. Measure at A and B