34
Troubleshooting, Adjustment, & Service
PTO Clutch Adjustment
Check the PTO clutch adjustment after every 250 hours
of operation. Also perform the following procedure if the
clutch is slipping or will not engage, or if a new clutch
has been installed.
1. Remove key from ignition switch and disconnect
spark plug wires to prevent the possibility of
accidental starting while the PTO is being adjusted.
2. See Figure 39. Note the position of the three
adjustment windows (A) in the side of the brake plate
and the nylock adjustment nuts (B).
3. Insert a .012” - .015” (2,5 - 4 mm) feeler gauge (C)
through each window, positioning the gauge between
the rotor face and the armature face as shown in
Figure 40.
4. Alternately tighten the adjustment nuts (B, Figure 39)
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
armature may vary even after performing the adjustment
procedure. This is due to dimensional variations on
component parts, and is an acceptable condition.
6. Check the mower blade stopping time. The mower
blades and mower drive belt should come to a
complete stop within five seconds after the electric
PTO switch is turned off.
7. Perform the BLADE BRAKE CHECK found in the
MAINTENANCE Section. Mower blades and mower
drive belt should come to a complete stop within five
seconds after electric PTO switch is turned off.
Figure 39. PTO Clutch Adjustment
A. Adjustment Window (Qty. 3, one shown)
B. Adjustment Nut
A
B
B
B
A
C
Figure 40. Adjust PTO Clutch
A. Window
B. Adjustment Nut (3)
C. Feeler Gauge
WARNING
To avoid serious injury, perform adjustments only
with engine stopped, key removed and tractor on
level ground.
B
