PERIODIC SERVICE
54
EVERY 500 HOURS
B
Electric Clutch Adjustment
The electric clutch serves 2 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 control is interrupted.
When the clutch is disengaged, the air gap between the
armature and rotor must be adjusted to 0.4 mm (0.015 in.)
for proper operation. The air gap adjustment is made at 3
bolts on the clutch. There are 3 inspection windows, one
next to each adjusting bolt. (See the figure below.)
1. Locate the inspection windows on the clutch.
2. Place a 0.4 mm (0.015 in.) feeler gauge in the slot
between the rotor and the armature. (See the figure.)
3. Tighten or loosen the adjusting nut as needed to
achieve the 0.4 mm (0.015 in.) air gap. (See the
figure.) Perform this operation at all 3 inspection
windows.
This adjustment should be done every 500 hours of
operation or annually, whichever comes first. In cases
where the machine is heavily used, air gap settings should
be checked more often.
If the air gap is too narrow, the clutch armature may drag
when disengaged, resulting in premature failure.
B
Checking Engine Valve Clearance (Z121S,
Z125S)
Consult your local KUBOTA Dealer for this service.
(1) Inspection window (x3)
(A) Electric clutch
(A) Electric clutch
(P) "INSERT 0.4 mm (0.015 in.) FEELER GAUGE HERE"
(A) Electric clutch
(Q) Adjustment nut
Summary of Contents for Z121S-AU
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Page 12: ... 5 SAFE OPERATION 5 DANGER WARNING AND CAUTION LABELS ...
Page 13: ...SAFE OPERATION 6 ...
Page 14: ... 7 SAFE OPERATION ...