Blade care, To remove blade, To replace blade – Troy-Bilt 466 User Manual
Page 13: Blade mounting torque, To sharpen blade, Replacing drive belt
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SECTION 7: SERVICING YOUR MOWER
Blade Care
Periodically inspect the blade adapter and pulley for
cracks, especially if you strike a foreign object. Replace
when necessary.
A
WARNING: When removing the cutting
blade for sharpening or replacement, protect
hands by using heavy gloves or a thick rag to
grasp the cutting blade.
•
Disconnect spark plug wire from spark plug.
•
Turnmoweron its side making sure that the air filter
and the carburetor are up.
To Remove Blade
•
Remove the bolt and the bell washer that hold the
blade-pulley assembly to the engine crankshaft.
See Figure 13 . Remove the assembly from the
crankshaft.
•
Remove the two bolts and lock nuts from the blade
assembly.
•
Remove the blade from blade adapter and pulley.
To Replace Blade:
•
Before reinstalling the blade-pulley assembly to the
unit: lubricate the engine crankshaft and the inner
surface of the blade adapter with light oil.
•
Also lubricate the bolt holes, bolt and the inner
surface of the nuts.
•
Install the blade adapter on the pulley with the “star"
away from the pulley. See Figure 13 .
L^jck Nut
Pulley
Figure 13
Place the new blade on the blade adapter with the
side marked bottom (has a part number) facing
away from the adapter.
Secure the blade to the assembly with two hex
bolts and lock nuts. Tighten the hex bolts to the
recommended torque. Refer to ‘Blade Mounting
Torque’ information below.
• Install the blade assembly on the engine
crankshaft. Secure with the hex bolt and bell
washer (cupped side of washer to blade) and
tighten to the recommended torque. Refer to ‘Blade
Mounting Torque’ information below.
IMPORTANT: The bolt used to secure the blade to the
engine is specially heat-treated. Do not substitute. To
order replacement bolt, refer to the parts list in the back
of this manual.
A
WARNING: To ensure safe operation of
your unit: all nuts and bolts must be checked
periodically for correct tightness.
Blade Mounting Torque:
Blade adapter bolts: 120 in.lbs. minimum: 150 in.lbs.
maximum.
Center bolt: 450 in.lbs. minimum, 600 in.lbs. maximum.
To Sharpen Blade:
•
The blade can be sharpened with a file or on a
grinding wheel. Do not attempt to sharpen the
blade while it is still on the mower.
•
Follow the original angle of grind as a guide. Make
sure that each cutting edge receives an equal
amount of grinding to prevent an unbalanced blade.
An unbalanced blade will cause excessive vibration
when rotating at high speeds, may cause damage to
the mower and/or personal injury. Test the blade by
balancing It on a round shaft screwdriver or a blade
balancer.
•
If the blade is not balanced, remove metal from the
heavy side until it balances evenly.
Replacing Drive Belt
•
Remove two shoulder screws securing the front
drive cover to the mower deck. See Figure 14 .
•
Press inward on the sides of the front drive cover
and release the tabs that secure the front drive
cover to the height adjuster brackets. Remove drive
cover from the mower.
•
Using a torx wrench, loosen the screw holding the
belt tension spring to the transmission. See Figure
14. Do not remove the screw completely. As you
loosen the screw, the tension on the belt will be
released.
•
Push the transmission up a little and slide the belt
off the transmission pulley.
•
Lift the mower to access the belt from the underside
of the mower.
13