Craftsman 486.242112 - Manual (Page 13)

13
SPROCKET, CHAIN AND PAWL SERVICE
IMPORTANT: Do not remove both wheels at the same
time to avoid mixing of parts. (The R.H. and L.H. ratchet
sprockets are not interchangeable.)
Make notes on the
position of washers and snap rings during disassembly.
• Remove the dust cover by removing the two rivets
which fasten it to the wheel housing. (It is not
necessary to remove the dust cover if you are only
cleaning and lubricating the chain and sprockets.)
• Remove the retaining rings and washers which hold
the sprockets onto the shafts.
• Remove the chain and both sprockets, holding them in
position and sliding them off both of the shafts. (Look
for the drive pin, which may fall out of the brush shaft
when the ratchet sprocket is removed.) See fi gure 23.
• To reassemble, insert the drive pin through the hole
at the end of the brush shaft. Make sure the pin slides
back and forth easily in the shaft.
• Lightly grease both shafts and the chain, and fi ll the
ratchet sprocket with grease. Assemble the chain with
both sprockets back onto the shafts.
• Lightly grease the axle and then reassemble the wheel.
The brushes should rotate only during forward rotation
of the wheel. If the brushes are driven (rotated) by both
forward and reverse rotation of the wheel, the drive pin
is jamming in the ratchet gear. Disassemble and clean
and lubricate the drive pin and ratchet gear.
BRUSH REPLACEMENT
NOTE: Brush replacement should be done one brush at
a time.
• Remove the hopper bag from the sweeper.
• Loosen the hex bolts and lock nuts on two single
brush retainers which clamp one brush to the double
brush retainers.
Do Not loosen or remove the bolts
which fasten the double brush retainers to the brush
shaft. See fi gure 22.
• Slide the brush out of the retainers, noting on which
side of the brush the bristles overlap. See fi gure 22.
• Install new brush, making sure the bristles overlap on
the same side of the brush as before. See fi gure 22.
GEAR SPROCKET
CHAIN
RATCHET
SPROCKET
DRIVE PIN
DUST COVER
BRUSH ROTATION
BRUSH ROTATION
OVERLAP
BRISTLES
OVERLAP
BRISTLES
SINGLE
BRUSH
RETAINERS
DOUBLE BRUSH RETAINER
BRUSH
SHAFT
FIGURE 22
• Brushes set too low.
• Brushes are jammed
• Wheels are jammed.
Wheels skid when sweeping. • Adjust height till brushes are 1/2"
down into grass.
• Stop sweeper. Remove obstruction.
• Remove one wheel at a time to check
for obstruction or damage. Refer to
Service and Adjustments section.
SERVICE AND ADJUSTMENTS
TROUBLESHOOTING