24
Section 4 - ADJUSTMENT & REPAIR
4.4.2.
(NINJA) BLADE WEAR LIMITS
The ninja recycling blade requires more frequent service
intervals than standard blades. Check for excessive wear
and damage before each use. See Figure 4.19.
FIGURE 4.19
4.4.3.
(STANDARD) BLADE SHARPENING
Blades should be kept sharp at all times. When the
blades are dull, cut grass will be ragged and lawn will
usually turn brown. Sharpen standard blades as follows:
1. Move tractor to a firm, level surface.
2. Turn engine "OFF". Remove key.
3. Remove mowing deck from tractor.
4. Remove mower blade(s).
5. If a blade is in good condition, sharpen cutting edge
at an angle of 22 to 28 degrees. DO NOT sharpen
beyond existing cutting edge. Replace blades not in good
condition. See Figure 4.20.
FIGURE 4.20
4.4.4.
(NINJA) BLADE SHARPENING
The Ninja recycling blades requires more frequent
service intervals than standard blades. When the blades
are dull, cut grass will be ragged and lawn will usually
turn brown. Sharpen standard blades as follows:
1. Move tractor to a firm, level surface.
2. Turn engine "OFF". Remove key.
3. Remove mowing deck from tractor.
4. Remove mower blade(s).
5. Sharpen all cutting edges of the Ninja recycling
blade at an angle of 22 to 28 degrees for optimum
performance. See Figure 4.21.
FIGURE 4.21
WARNING
DO NOT attempt any adjustments, maintenance or service
with the engine or blade running. STOP blade. STOP
engine. Set brake. Remove key. Remove spark plug wire
from spark plug and secure wire away from spark plug.
Engine and components can be extremely hot. Avoid
burns by allowing engine and components sufficient time
to cool. Wear heavy leather gloves when handling or
working around cutting blades. Blades are extremely
sharp and can cause severe injury.
4.4.5.
33" MOWER BLADE REPLACEMENT
1. Move tractor to a firm, level surface.
2. Turn engine "OFF". Remove key.
3. Remove mowing deck from tractor.
4. Position deck on its left side to access blade.
5. Remove blade mounting bolts, nuts and washers.
See Figure 4.22.
FIGURE 4.22
NEW
BLADE
WEAR LIMIT. (CRACKS
OR NOTCHES BEGIN
TO APPEAR)
DANGEROUS CONDITION!
DO NOT USE ON MOWER!
NINJA BLADE
22º TO 28º
BLADE TIP
22º TO 28º
ORIGINAL CUTTING EDGE
STANDARD BLADE
NUT
LOCK WASHER
BLADE
BAR
BLADE
BLADE MOUNTING
BOLTS
