Craftsman 987.889000 - Manual (Page 28)

SERVICE AND ADJUSTMENTS
BUDE DRIVE BELT
ADJUSTMENT
If the blade drive belt is slipping
due to lack of belt tension, follow
the steps below.
1.
Stop engine, wait for all parts
to stop moving, and disconnect
sparkplug wire.
2. Remove belt cover as described
in “Belt Cover Removal" instruc­
tions.
3. With mower on ievel ground,
adjust blade cutting height at
about 3" {measure frgm ground to
flat portion of blade)..
4. With the Blade Drive Control
(Figure 5-7) in the disengaged
position, set a gap of 1/8" between
the spring (F. Figure 5-9) and flat
washer (E) by adjusting the nut
(D).
5. Reinstall the belt cover,
securely.
6. Test the operation of the blade
brake (see “Blade Brake Control
Test”).
7. If the drive belt slips during op­
eration, it may be necessary to re­
locate idler (J, Figure 5-9) in the
slot provided in the mounting
bracket.
With the engine
stopped and the sparkplug
wire disconnected,
loosen the
hardware on the idler (J) and slide
it forward to take up slack in the
belt.
8. Engage the blade drive and
measure the distance (X, Figure
5-8) between the centers of pul­
leys (K) and (L). The distance
should be 5-1/2 to 5-5/8". After
obtaining the correct dimension,
reinstall the belt cover securely
and test the operation of the blade
brake.
Adjust idler in direction
of arrow to tighten
blade drive belt
1 / 8 "
Figure 5-9: Blade drive adjustment.
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