36
www.snapper.com
WARNING
To avoid serious injury, perform adjustments only with
engine stopped, key removed and rider on level
ground.
B
A
C
A
B
B
B
Figure 38. PTO Clutch Adjustment
A. Adjustment Window (Qty. 3, one shown)
B. Adjustment Nut
Figure 39. Adjust PTO Clutch
A. Window
B. Adjustment Nut
C. .016”-.018” (0,40-0,45mm) Feeler Gauge
PTO Clutch Adjustment
Check the PTO clutch adjustment after every 100 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 38. Note the position of the 3 adjustment
windows (A) in the side of the brake plate and the nylock
adjustment nuts (B).
3. Insert a .016”-.018” (0,40-0,45mm) feeler gauge (C)
through each window, positioning the gauge between the
rotor face and the armature face as shown in Figure 39.
4. Alternately tighten the adjustment nuts (B, Figure 38)
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 (5) seconds after the electric PTO switch
is turned off.
Blade Brake Check
Mower blades and mower drive belt should come to a
complete stop within five (5) seconds after electric PTO
switch is turned off.
1. With parking brake engaged, PTO disengaged and an
operator in the seat, start the engine engine.
2. Have an assistant observe the mower drive belt through
the opening between the frame and top of mower deck.
Engage the PTO and wait several seconds. Disengage the
PTO and check the amount of time it takes for the mower
drive belt to stop.
3. If the mower drive belt does not stop within five (5)
seconds, perform the PTO Clutch Adjustment. If the belt
still does not stop within five (5) seconds, see your
dealer.
