Toro 74239 Operator's Manual page 46

7. If the measurements at positions B or C are not
correct, loosen the bolt attaching the rear chain to the
rear support arm (Fig. 65).
8. Loosen the jam nut under the rear support arm and
adjust the adjustment bolt to get a measurement of
3–1/8 to 3–1/4 inches.
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.
Front
2
1
3
1
Figure 65
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 (Fig. 66).
2. Measure the right blade at the A location (Fig. 66),
from a level surface to the cutting edge of the blade tip
(Fig. 67).
3. Record this measurement.
4. Measure the right blade at the B location (Fig. 66),
from a level surface to the cutting edge of the blade tip
(Fig. 67).
5. Record this measurement.
6
2
7
4
5
m–6830
5. Adjustment bolt
6. Front swivel
7. Front support arm
46
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
(Fig. 66). If it is not correct, proceed to the following
steps.
Figure 66
MEASURE FROM
CUTTING EDGE TO A
LEVEL SURFACE
Figure 67
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) (Fig. 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 (Fig. 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
(Fig. 16).
2. Check the distance between the two large washers, it
needs to be 10–1/2 inches (26.7 cm) (Fig. 68).
3. Adjust this distance, by loosening the spring jam nut
and turning the nut in front of each spring (Fig. 68).
Turning the nut clockwise will shorten the spring;
counter–clockwise will lengthen the spring.
m–1078
m–2539