36
REASONS SLIP CLUTCHES FAIL
* DULL BLADES*
When the blades become dull, the cutting or chipping effect is lost; (dull blades become hammers
and will not cut). The dull blades require more torque to hammer into and through the material. The
Tree Cutter is not designed to hammer through material. This hammering action will destroy the
machine and slip clutch from increased shock load and increased torque required from dull blades.
NEVER operate the unit with dull or damaged blades.
* GROUND SPEED*
Excessive ground speed increases the torque load to the slip clutch. As more material is fed into the
cutting chamber; more torque is required to pass through the slip clutch. NOTE: A good measure
for proper ground speed is to watch the tractor tachometer, if the tractor engine loses speed (R.P.M.
drop) reduce your ground speed to regain your engine speed. NEVER reduce your ground speed by
the engine throttle; (select a lower gear to reduce ground speed).
* DECK ADJUSTMENT*
Improper deck adjustment or deck attitude will increase the torque load to the clutch. See proper
deck adjustment in this manual. The front of the cutter deck should be adjusted 1 inch lower than the
rear of the deck, this allows the material to be cut on the front side of the blade arc. If the deck were
adjusted with the front higher than the rear, all the material will be cut twice. NEVER lower cutter
deck down onto material. Keep cutter deck down on the ground at cutting height.
* ENGINE SPEED*
Your tractor engine is designed to operate at a continuous speed to produce a given P.T.O. speed (540
or 1000 R.P.M.). Failure to keep the tractor engine at the proper speed will cause the Tree Cutter to
be under powered; thus increasing the torque load to the slip clutch. Refer to tractor owners manual
for proper tachometer setting to deliver the proper P.T.O. speed to the cutter. NEVER operate your
cutter at less than manufactures recommended engine speed for proper P.T.O. output speed. The Tree
Cutter is designed to operate at a certain P.T.O. speed (NOT BOTH). Refer to model number or call
Brown Mfg. Corp. if you have questions about your Tree Cutter design speed.
SLIP CLUTCH FAILURE IS NOT COVERED UNDER WARRANTY
TORQUE SETTING PROCEDURE FOR SLIP
CLUTCH IS FOUND ON PAGE 58
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