Toro 20351 Quality Guide - Page 30

Service Dealer°s Guide to Great Quality of Cut, Adjusting Blade Tracking

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Checking and Adjusting the Blade Level 4. Measure from the front blade tip to the ground, mark that tip with tape for future reference and rotate it 180 degrees to the rear and measure from the tip to the ground. If the tip in the front is not 0-5/16 inch (0-8mm) lower than in the rear, adjustment is necessary (Figure 46). 7. After adjusting both eyebolt lock nuts evenly, check the front-to-rear pitch again. Continue adjusting the eyebolts until the front blade tip is 0-5/16 inch (0-8mm) lower than in the rear. 8. When the front-to-rear pitch is correct, tighten the pivot plate mounting bolts. 9. Check the side-to-side level to assure that has not changed. Correct if needed (see "Adjusting Side-to-Side Level-All Cutting Units" on page 4-10). 10. Check gage wheel height. Each wheel should be approximately 3/8 inch (9.5mm) off the ground. Adjust as needed. 11. Once the front-to-rear pitch and side-to-side level are within specification, continue by checking and adjusting the blade tracking, as follows. Figure 46 XL44pit2.TIF 1. Blade front to rear 2. Measure front blade tip 3. Measure rear blade tip 4. Measure here 5. To adjust the front-to-rear pitch, loosen the front mounting plate bolts slightly (Figure 47). Adjusting Blade Tracking The 32-inch (81.3cm) cutting unit requires a blade tracking adjustment procedure different from the procedure required for the 38-inch (96.5cm) and the 44-inch (111.7cm) cutting units. Use the procedure, as follows, appropriate to the cutting unit on which you are working. 32-inch (81.3cm) Cutting Unit The blade should be a minimum of 1/8 inch (3.1mm) above the bottom of the housing. If it is not, you may adjust it by inserting a washer or other shim between the spindle housing and mower housing. Re-measure the blade side to side. If now correct, remove the spindle-housing bolt and re-install through the housing, shim, and spindle. Note that the blade tip will move more than the thickness of the shim. This adjustment is to ensure the blade travels in an even plane at an even distance above the bottom of the mower housing. Figure 47 XL44pit3.TIF 1. Pivot mounting bolt 2. Eyebolt locknut 6. Rotate the lock nuts on the eyebolts to change the adjustment. To raise the front of the mower, tighten the eyebolt lock nuts. To lower the front of the mower, loosen the eyebolt lock nuts. 4 - 14 Service Dealer's Guide to Great Quality of Cut

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4 - 14
Service Dealer°s Guide to Great Quality of Cut
Checking and Adjusting the Blade Level
4.
Measure from the front blade tip to the ground,
mark that tip with tape for future reference and
rotate it 180 degrees to the rear and measure from
the tip to the ground. If the tip in the front is not
0-5/16 inch (0-8mm) lower than in the rear,
adjustment is necessary (Figure 46).
Figure 46
XL44pit2.TIF
5.
To adjust the front-to-rear pitch, loosen the front
mounting plate bolts slightly (Figure 47).
Figure 47
XL44pit3.TIF
6.
Rotate the lock nuts on the eyebolts to change the
adjustment. To raise the front of the mower,
tighten the eyebolt lock nuts. To lower the front of
the mower, loosen the eyebolt lock nuts.
7.
After adjusting both eyebolt lock nuts evenly,
check the front-to-rear pitch again. Continue
adjusting the eyebolts until the front blade tip is
0-5/16 inch (0-8mm) lower than in the rear.
8.
When the front-to-rear pitch is correct, tighten the
pivot plate mounting bolts.
9.
Check the side-to-side level to assure that has not
changed. Correct if needed (see ±Adjusting
Side-to-Side Level³All Cutting Units² on page
4-10).
10.
Check gage wheel height. Each wheel should be
approximately 3/8 inch (9.5mm) off the ground.
Adjust as needed.
11.
Once the front-to-rear pitch and side-to-side level
are within specification, continue by checking and
adjusting the blade tracking, as follows.
Adjusting Blade Tracking
The 32-inch (81.3cm) cutting unit requires a blade
tracking adjustment procedure different from the
procedure required for the 38-inch (96.5cm) and the
44-inch (111.7cm) cutting units. Use the procedure, as
follows, appropriate to the cutting unit on which you are
working.
32-inch (81.3cm) Cutting Unit
The blade should be a minimum of 1/8 inch (3.1mm)
above the bottom of the housing. If it is not, you may
adjust it by inserting a washer or other shim between
the spindle housing and mower housing. Re-measure
the blade side to side. If now correct, remove the
spindle-housing bolt and re-install through the housing,
shim, and spindle. Note that the blade tip will move
more than the thickness of the shim. This adjustment is
to ensure the blade travels in an even plane at an even
distance above the bottom of the mower housing.
1.
Blade front to rear
2.
Measure front blade
tip
3.
Measure rear blade tip
4.
Measure here
1.
Pivot mounting bolt
2.
Eyebolt locknut