Craftsman 247.28933 - Manual (Page 123)

SERVICE AND MAINTENANCE
Pivot the idler bracket/idier pulley to relieve the tension on the
timing belt, and reposition the drive pulley and/or timing pulley to
achieve the 90° orientation of the timing arrows on the pulleys.
Re-install the idler bracket backstop and position so that there is a
1/8” gap between the backstop and idler bracket. Tighten the hex
screw and flange lock nut to secure in the adjusted position.
BELTS
A warning
Be sure to shut the engine off, remove ignition key, disconnect the
spark plug wire(s) to prevent unintended starting before removing the
belt(s).
PTO Belt
All belts on your tractor are subject to wear and should be replaced it
any signs of wear are present.
IMPORTANT: Do not use substitute belts. The belt found on your
tractor is specially designed tor optimal performance and service life
for your deck application. Use only OEM original replacement belts.
To replace the PTO belt, proceed as follows:
1. Remove the deck from beneath the tractor (refer to Cutting Deck
Removal).
2. Maneuver the PTO belt downward and off the idler pulley on the
spring loaded idler bracket.
NOTE: It may be necessary to loosen the hex cap screw and flange
lock nut securing the pulley to the idler bracket to fit the belt between
the pulley and bracket. Slide the belt between the bottom of the idler
pulley and top of the timing belt idler pulley below. See Figure 22.
4.
the right hand spindle assembly. Lift the belt over the pulley and
out from beneath the spindle cover. See Figure 22.
Loop the new PTO belt and slide between the top of the drive
pulley and spindle cover. Maneuver the belt around and into the
V-groove of the drive pulley.
5. Route the back side of the belt around idler pulley and between
the idler pulley and idler bracket. Re-tighten the hex screw and
flange lock nut it loosened earlier. Refer to Figure 22.
6 . Route the belt around the fixed idler pulley as shown in Figure 22
and re-install the deck as described in “Reinstalling the Cutting
Deck” later in this section.
Timing Belt
To replace the timing belt, proceed as follows:
1. Remove the deck from beneath the tractor (refer to Cutting Deck
Removal).
2. Remove the PTO belt drive pulley of the right hand spindle
assembly as described in “PTO Belt.”
3. Remove the hex screw, flat washer, lock washer, shoulder spacer,
and flange lock nut that make up the idler bracket backstop. Refer
to Figure 21 above.
NOTE: It may be necessary to clean the underside of the mowing deck
to access the hex screw.