Warner Electric Garden Tractor Clutch - Manual (Page 7)

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Warner Electric • 800-825-9050 P-1097-6 • 819-0458
11. Due to dimensional variations, the airgap
between the rotor and armature may vary
on a clutch from .023/.005", even though
the gap at the three windows was set at
.012". This is an acceptable condition.
12. Using feeler gauges, check the airgap
through the three windows. If the airgap
does not fall between .023/.005", repeat the
above procedure. Remember: Never check
the airgap directly over a rivet joint.
Option 1:
Setting on the engine crankshaft.
13. To help set the airgap, mount the
unairgapped unit directly to the engine
crankshaft, securing it to the shaft with the
appropriate bolt and washer with a
minimum thickness of .250". When going
from an unclamped state to a clamped
state, the clearance between the rotor and
armature is reduced about .002". A .012"
feeler gauge should still be used in the
clamped state. If a 3/8" diameter bolt is
used, tightening torque on the bolt should
be 340-45 lb.ft. Grade 8 bolt. If a 7/16"
diameter bolt is used, tightening torque on
this bolt should be 50-55 lb.ft. Grade 5 or 8
bolt.
Note:
Care must be exercised when setting
the airgap with the clutch secured to the
shaft, as it is difficult to detect rotor/armature
drag when the engine is running.
14. As an alternative to mounting directly to the
crankshaft in setting the gap, an assembly
fixture consisting of a stub shaft with a
shoulder can also be used. This stub shaft
should duplicate the crankshaft dimensions.
Secure the clutch to this shaft as noted
above in Step 13.