Scag Power Equipment WILDCAT STWC48V-25CV - Manual (Page 32)

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Section 6
ELECTRIC CLUTCH ADJUSTMENT 6.8
The electric clutch serves two functions in the operation of
the mower. In addition to starting and stopping the power
flow to the cutter blades, the clutch also acts as a brake to
assist in stopping blade rotation when the PTO is switched
off or the operator presence circuit is interrupted.
When the clutch is disengaged, the air gap between
the armature and rotor must be adjusted to fifteen
thousandths of an inch, 0.015, for proper operation. The
airgap adjustment is made at three bolts on the clutch.
There are three inspection windows, one next to each
adjusting bolt. See Figure 6-3.
INSPECTION WINDOW (x3)
Clutch Air Gap Adjustment Figure 6-1.
Locate the inspection windows on the clutch. 1.
Place a 0.015 feeler gauge in the slot between the 2.
rotor and the armature.
Tighten or loosen the adjusting bolt as needed to 3.
acheive the 0.015 inch airgap. See Figure 6-4.
Perform this operation at all three inspection
windows.
ADJUSTMENT NUTS
ADJUSTMENT NUTS
Clutch Air Gap Adjustment Figure 6-1.
This adjustment should be done every 500 hours of
operation or annually, whichever comes first. In cases
where the machine is heavily used, airgap settings should
be checked more often.
If the air gap is too narrow, the clutch armature may drag
when disengaged, resulting in premature failure.
If the air gap is too wide, the clutch may be slow to
engage as the magnet must pull the armature in from a
greater distance.