MTD Garden Tractors User Manual page 44

For Parts Call 606-678-9623 or 606-561-4983
Figure 3-52.
c. Turn the PTO switch on.
3. If the meter reads below 3.5 amps, the prob-
lem would be in the electrical system leading to
the clutch such as the battery, a relay, or a
switch.
4. If the meter reads 3.5 amps or above, proceed
to checking the air gap. See Figure 3-52.
a. Turn off the PTO.
b. Locate the three windows or notches
where the air gap is checked.
c. Check the gap at three locations using a
feeler gauge.
d. The factory air gap setting is .010 to .025
inch. See Figure 3-53.
Figure 3-53.
e. If the gap is incorrect, use a .017 feeler
gauge and adjust the gap by tightening or
loosening the three nuts on the clutch. See
Figure 3-54.
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Figure 3-54.
5. The electric clutch initially needs to be bur-
nished before it is used by the owner.
It is not done at the factory and is the responsi-
bility of the dealer or the customer.
a. To properly burnish the clutch, run the
engine at 50 percent throttle.
b. Engage and disengage the clutch 5 times,
ten seconds on and ten seconds off.
c. Increase to 75 percent throttle.
d. Engage and disengage the clutch 5 more
times, ten seconds on and ten seconds off.
6. If you have a unit with an electric clutch that
operates sporadically, check all wiring around
the steering column going to the dash for fray-
ing and shorts.
a. Check the relays for proper connections.
Newer models have in line relays to mini-
mize vibration and reduce failure.
b. You can remove the relays from the chas-
sis of older models and tape them directly
to the wiring harness.
c. Check the PTO switch for proper connec-
tions. The red and blue wires might be
reversed. The blue wire should be on top
with the red wire directly below it. The
brown wire should be on the opposite side.
3-24