4 - 12
4.11 TIRES
Before each use, make a visual check of tires. The
correct air pressure is 12-15 psi (83-103 kn/m2) for the
rear tires, and 20-25 psi (138-172 kn/m2) for the front
tires.
4.12 MOWER BLADES
NOTE: If mower is used under sandy soil conditions,
replace blades when air lifts become eroded through at
ends (Figure 9).
Sharpen The Mower Blades
1. Turn the engine off. Remove the ignition key.
Remove the ignition wires from the spark plugs.
2. Remove the bolts, lock washer, the flat washers,
and the blades from the spindle shafts.
3. Sharpen the beveled edges of the blades in a
straight line at a 25 degree angle. Do not change
the angle of the beveled edge. If more than 0.5
inches (12.7mm) are removed from the width of a
blade, discard the blade. Make sure the sharpened
blades are balanced. Balance must be held within
1.3 inch ounces.
4. Put the blades, the flat washers, lock washers, and
the bolts back on the spindle shafts.
5. Tighten the bolts to a torque of 70 ft. lbs.
6. Put the ignition wires back on the spark plugs.
50" and 60" Belt Layout
1. Long Mower Belt
2. Short Mower Belt
3. Springs
4. Idlers
5. Mower Clutch Sheave
1
3
2
4
OF1640
5
Figure 7
OF1631
2
3
1
4
5
6
1. Hydro Belt
2. Spring
3. Idler
4. Engine Sheave
5. Right Hand Hydrostat
6. Left Hand Hydrostat
Figure 8
CAUTION: Use sturdy gloves or padding to
protect hands when working with mower
blades.
1
2
3
4
1. Cutting Blade
2. Square Corner
3. Air Lift Erosion
4. Air Lift
OT0791
Figure 9
