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Regular Maintenance
Servicing the Mower Blades
Service Interval: Every 100 Hours or As Required
NOTE: Mower blades must be timed perpendicular to
each other.
1. Remove mower deck (see “Mower Deck Removal”).
2. See Figure 24. To remove blade for sharpening, use
a block of wood to prevent blade rotation while
loosening the capscrew.
3. 38”, 44”, & 50” Mowers: Remove the capscrew (D,
Figure 25), spring washer (C), hex washer (B), and
blade.
40” Mowers: Remove the capscrew (A, Figure 27),
spring washer (F), spline washer (G), alignment pin
(E) and blade (D). Do not remove the blade adapter
(C).
4. Use a file to sharpen blade to a fine edge. If blade is
damaged, it must be replaced.
5. Balance the blade as shown in Figure 25. Center the
blade’s hole on a nail lubricated with a drop of oil. A
balanced blade will remain level.
6. Reinstall the blade (Figures 26) with the tabs pointing
up toward the mower deck as shown. Reinstall the
alignment pin (E).
7. 38”, 44”, & 50” Mowers: Reinstall the hex washer
(B, Figure 26), spring washer (C) and capscrew (D).
Use a wooden block (A) to prevent blade rotation
while tightening the capscrew (D) to 61-75 N.m (45-
55 ft. lbs.).
40” Mowers: Be sure the blades are positioned
perpendicular to each other as shown in Figure 37. If
not, perform the Mower Blade Timing procedure
found in this section. Reinstall the spline washer (G,
Figure 27), spring washer (F) and capscrew (A). Use
a wooden block (B) to prevent blade rotation while
tightening the capscrew (A) to 61-75 N.m (45-55 ft.
lbs.).
WARNING
For your personal safety, do not handle the sharp
mower blades with bare hands. Careless or
improper handling of blades may result in serious
injury.
WARNING
For your personal safety, blade mounting
capscrews must each be installed with a
hex/spline washer and spring washer, then
securely tightened. Torque blade mounting
capscrew to 45 - 55 ft. lbs. (61 - 75 N.m.)
Figure 25. Balancing The Blade
Workbench
Nail
LOOSEN
Figure 24. Blade Removal
A
D
C
B
Figure 26. Blade Installation - 38”, 44”, 50” Mowers
A. 4x4 Wood Block
B. Hex Washer
C. Spring Washer
D. Blade Bolt