Kubota Z723, Operator'S Manual

Page: 76 / 95

59 PERIODIC SERVICE
ENGLISH
B
Changing Transaxle Fluid
(See "Replacing Transaxle Oil Filter Cartridge" in "EVERY
500 HOURS AFTER 300 HOURS" in "PERIODIC
SERVICE" section.)
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 should be less than 2.5 mm (0.100 in.)
and more than 0.25 mm (0.010 in.). Perform the following
procedure to check the electric clutch function.
1. Using a pneumatic line, blow out any debris from
under the brake pole and around the aluminum
spacers.
2. Check air gap between rotor and armature face on
both sides of the brake pole. If air gap is 2.5 mm (0.100
in.) or greater, or if clutch is having trouble engaging
when hot, proceed to Step 3. Otherwise, skip to Step
9.
3. Loosen both brake mounting bolts 1 full turn.
4. Use pliers or hand to remove the shim. Do not discard
shim until proper clutch function has been confirmed.
5. Using a pneumatic line, blow out any debris from
under the brake pole and around the aluminum
spacers.
6. Tighten each brake mounting bolt. Torque to 13-14.2
N-m (9.5-10.5 lbf-ft).
7. Using a 0.25 mm (0.010 in.) thick feeler gage, verify
that a gap is present between the rotor and armature
face on both sides of the brake pole.
8. If the gap is less than 0.25 mm (0.010 in.), reinstall the
shim and see your Kubota Dealer. If gap is greater
than 0.25 mm (0.010 in.), proceed to next step.
9. Verify tightness of clutch mounting bolt. Torque to 67-
75 N-m (50-55 lbf-ft)
(1) Rotor
(2) Armature
(3) Shim
(4) Brake mounting bolt
(5) Aluminum spacers (A) Air gap
(P) Check gap on one side
(Q) Check gap on other side
(1) Clutch mounting bolt