Craftsman 247.28933 - Manual (Page 28)

SERVICE AND MAINTENANCE
Applying force to either the timing belt idler pulley or the timing 9.
belt idler bracket, pivot and hold the idler bracket against the
spring tension just tar enough to allow lifting the timing belt off
and above the idler pulley. Carefully release the idler bracket. See
Figure 21. 10 .
Loop the timing belt and lift out of the timing pulley and over the
right hand spindle assembly. Maneuver the belt between the drive 11 ,
pulley on top of the spindle assembly and the spindle cover to
remove. -| 2 _
Repeat the above procedure to remove the belt from the left hand
spindle assembly timing pulley. Refer to Figure 21.
Loop the new timing belt and maneuver the belt between the drive
pulley on top of the right hand spindle assembly and the spindle 13 ,
cover. Lower the belt until loosely around the right hand timing
pulley. Refer to Figure 21.
Note the arrows on the top of the timing pulley on the LH spindle
and on the drive pulley of the RH spindle assembly. These timing
arrows MUST be positioned 90° from each other as shown in 14 ,
Figure 23.
Rotate the RH spindle assembly to position the drive pulley timing
arrow as shown in Figure 19. Then without moving the RH drive
pulley, pull the timing belt tight against the RH timing pulley, above
the timing belt idler pulley, and over to the LH timing pulley.
Turn the LH timing pulley so that its timing arrow is 90° from the
RH spindle assembly timing arrow. Refer to Figure 23.
While making sure not to change the position of either pulley, loop
the timing belt over the LH timing pulley.
After making sure the spring is hooked onto the idler bracket and
screw, pivot the timing idler bracket/idler pulley against the spring
tension just far enough to allow you to lower the backside of the
timing belt onto the idler pulley. See Figure 23.
Re-check the timing arrows on the two pulleys. If they have
moved from the 90° position when tensioning the timing belt, pivot
the idler pulley to relieve tension on the belt and re-position the
pulleys. The timing arrows MUST be positioned 90° from each
other as shown in Figure 23.
Re-install the idler bracket backstop components as originally
installed in the deck housing, 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.
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