25
Troubleshooting, Adjustment, & Service
WARNING
To avoid serious injury, perform adjustments only
with engine stopped, key removed and tractor on
level ground.
Electric PTO Clutch Adjustment
Check the PTO clutch adjustment after the initial 50 hour
break-in period and then after every 250 hours of opera-
tion. Perform the following procedure if the clutch is slip-
ping or will not engage. Also perform this adjustment on
new clutches.
1. Remove key from ignition switch and disconnect
spark plug wires to prevent the possibility of acciden-
tal starting while the PTO is being adjusted.
2. Note the position of the 3 adjustment windows (A,
Figure 35 & 36) in the side of the brake plate and the
nylock adjustment nuts (B).
3. Insert a .3mm (.010”) feeler gauge (C, Figure 36)
through each window, positioning the gauge between
the rotor face and the armature face as shown.
NOTE: The air gap must be no less than .010” (.3mm)
and no more than .015” (.4mm).
4. Alternately tighten the adjustment nuts (B) until the
rotor face and armature face just contacts the gauge.
5. Check the windows for an equal amount of tension
when the gauge is inserted and removed, and make
any necessary adjustments by tightening or loosening
the adjustment nuts.
NOTE: The actual air gap between the rotor and arma-
ture may vary even after performing the adjustment pro-
cedure. This is due to dimensional variations on compo-
nent parts, and is an acceptable condition.
6. Check the mower blade stopping time. The mower
blades and mower drive belt should come to a com-
plete stop within five seconds after the electric PTO
switch is turned off.
A
B
B
A
B
B
C
Figure 35. Adjust PTO Clutch
A. Window
B. Adjustment Nut
Figure 36. Adjust PTO Clutch
A. Window
B. Adjustment Nut
C. .010” Feeler Gauge
