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Craftsman 917.28851 Operator's Manual page 24

Lawn tractor 21.0 hp,*42" mower electric start automatic transmission
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TO REPLACE MOWER BLADE DRIVE
BELT
The mower blade drive belt may be replaced
without tools, Park the tractor on level sur-
face. Engage parking brake,
BELT REMOVAL-
1. Remove mower fromtractor (See'q-O RE-
MOVEMOWE R"in thissection of manual),
2. Work belt off both mandrel pulleys and
idler pulleys,
3, Pult belt away from mower,
BELT INSTALLATION -
1, Work belt around both mandrel pulleys
and idler pulleys
2. Ensure belt is in all pulley grooves and
inside all belt guides,
3. Install mower (See "To Install Mower" in
this section of this manual).
...... Mandrel
idler
BELT INSTALLATION -
1. Install new belt from tractor rear to front,
over the steering plate (F) and above
clutch brake pedal shaft (G).
2. Pull belt toward front of tractor and roll
belt onto engine pulley (E),
3. Pull belt toward rear of tractor. Carefully
work belt down around transmission
cooling fan and onto the input pulley (D).
Ensure belt is inside the belt keeper,
4, install beit on centerspan idler (C)+
5. install belt through stationary idler (A)
and clutching idler (B).
6. Ensure belt is in all pulley grooves and
inside all belt guides and keepers.
7. Install mower (See "TO INSTALL MOW-
ER" in this section of manual),
Mandrel
TO REPLACE
MOTION
DRIVE
BELT
Park the tractor on level surface.
Engage
parking
brake.
For assistance,
there is a
belt installation
guide decal on bottom side
of left footrest.
BELT REMOVAL
-
1. Remove
mower
(See "TO
REMOVE
MOWER"
in this section of manual).
NOTE:
Observe
entire
motion
drive
belt
and position of all belt guides and keepers.
2. Remove beltfrom
stationary
idler (A) and
clutching
idler (B).
3. Remove belt from centerspan
idler (C).
6. Pull belt slack toward
rear
of tractor.
Carefully
remove
belt
upwards
from
transmission
input pulley and over cool-
ing fan blades
(D).
4. Remove
belt
downward
from
engine
pulley (E).
5. Slide belt toward
rear of tractor, off the
steering plate (F) and remove fromtractor.
TO CHECK BRAKE
If tractor requires more than five (5) feet to
stop at highest speed in highest gear on a
level, dry concrete or paved surface, then
brake must be serviced.
You may also check brake by:
1. Park tractor on a level, dry concrete or
paved surface, depress brake pedal all
the way down and engage parking brake.
2. Disengage
transmission
by placing
freewheel control in "transmission dis-
engaged" position. Pultfreewheel control
out and into the slot and release so it is
held in the disengaged position.
The rear wheels must lock and skid when
you try to manually push the tractor forward.
If the rear wheels rotate, then the brake
needs to be serviced. Contact a Sears or
other qualified service center.
24

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