Snapper 381451HBVE, Safety Instructions & Operator'S Manual

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Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. STOP
engine. STOP blade. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
HOT. Avoid serious burns, allow all parts to cool
before working on machine.
4.1 ENGINE ADJUSTMENTS & REPAIR
Refer to the Engine owner’s Manual for the
adjustments/repairs that can be made by the owner.
4.2 MOWER BLADE REPLACEMENT
4.2.1. Blade Wear Limits
Blades are subject to wear during normal usage
and require frequent inspections. Blades that have
reached the wear limit (see Figure 4.1) or have
been damaged must be replaced.
WARNING
DO NOT operate machine with a blade that shows
signs of excessive wear or damage.
FIGURE 4.1
4.2.2. Blade Sharpening
Inspect blades carefully. Blades that have not
reached the wear limit and have not been damaged
may have the cutting edge resharpened. DO NOT
attempt to sharpen a blade that shows signs of
excessive wear or damage. DO NOT sharpen
beyond existing cutting edge.
WARNING
Blades are extremely sharp and can cause severe
injury. Wear heavy gloves when handling or working
around blades.
1. Stop engine. Stop blades. Engage parking
brake. Remove key.
2. Carefully stand machine on rear bumper.
3. Remove blades. See Figure 4.2.
FIGURE 4.2
4. Inspect condition of blades. See Figure 4.1.
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.
6. Check blade balance after sharpening. Correct
blade balance by grinding on the tip of the heavy
end of the blade.
7. Reinstall blades. Carefully align center hole in
blade onto blade retainer and slide on spindle shaft.
Install cone washer and nut. Torque nut to 60 to 90
ft. lbs. See Figure 4.2.
8. Carefully lower machine off of bumper.
4.2.3. Blade Replacement
1. Stop engine. Stop blades. Engage parking
brake. Remove key.
2. Carefully stand machine on rear bumper
3. Loosen blade nut and remove.
4. Install new blade with airlift side up. Carefully
align center hole in blade onto blade retainer. Install
cone washer and nut. Torque nut to 60 to 90 ft. lbs.
5. Carefully lower machine off of bumper.
4.3 MOWER BLADE DRIVE BELTS – ADJUSTMENT /
REPLACEMENT
4.3.1. Engine to Deck Belt Adjustment
The engine to deck belt will require periodic tension
adjustment to maintain peak blade drive
performance.
1. Stop engine. Stop blades. Engage parking
brake. Remove key.
(Continued on next page)
WEAR LIMIT
(NOTCH STARTS)
NEW BLADE
DANGEROUS CONDITION!
DO NOT USE ON MOWER!
REPLACE WITH NEW
REMOVE BLADE
NUT