Service And Adjustments; Replacing Drive Belt - Troy-Bilt 566 Operator's Manual

Variable speed 21” self propelled mulching mower
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SECTION 7: SERVICE & ADJUSTMENTS

Replacing Drive Belt

Remove two shoulder screws securing the front
drive cover to the mower deck. See Figure 11.
Belt
Shoulder
Screw
Transmission
Figure 11
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
11. Do not remove the screw completely. As you
loosen the screw, tension on the belt will release.
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.
WARNING:
Use a thick piece of rag to
handle the blade while sliding the belt in the
next step. Make sure the engine does not start
at all while doing this job.
Slide the belt off the engine pulley and around the
blade. See Figure 12 .
Replace with the new belt, working around the
blade. Make sure the belt is firmly seated on the
engine pulley while pulling from the other side and
sliding it around the transmission pulley.
Put the mower down with all four wheels firmly
placed on one level.
Loosen this screw
Shoulder
Screw
Front Drive
Cover
Tighten the screw, loosened earlier, to secure the
belt tension spring to the transmission, and
reassemble the front drive cover.
Right Front
Wheel
Engine Pulley
Replacing Rear Flap
To remove rear flap, cut off the flat end of the wire
rod which secures it to the deck. See Figure 13 .
Attach the new flap and new rod to deck, bending
the ends of the new rod over to secure to deck.
Rear Discharge
Door
Handle
Bracket
Adjusting Cutting Height
All wheels must be placed in the same
IMPORTANT:
relative position. For rough or uneven lawns, move the
height adjustment lever to a higher position. This will
help stop scalping of the grass.
An adjusting plate and thumb lever at each wheel
provides cutting height adjustment. Each adjusting
plate has nine height positions. Height of cut will be
changed when you move the thumb lever from one
position to another.
Simply depress the lever towards the wheel and
move the lever assembly to desired position. See
Figure 14 .
For rough or uneven lawns, move the height
adjustment handles to higher cutting height position
14
Left Front
Wheel
Figure 12
Handle
Bracket
Rear
Flap
Figure 13

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