Snapper 355Z Series Operator's Manual page 38

Figure 38, PTOClutch 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) FeelerGauge
PT0 Clutch Adjustment
Checkthe PTOclutch 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. Removekey from ignition switch and disconnect spark
plug wires to prevent the possibility of accidental starting
while the PTOis being adjusted.
2. See Figure38. 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 betweenthe
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. Checkthe windows for an equal amount of tension when
the gauge is inserted and removed, and make any
necessaryadjustments by tightening or loosening the
adjustment nuts.
NOTE."Theactual air gap between the rotor and armature
may vary evenafter performing the adjustment procedure,
This is due to dimensional variations on component parts,
and is an acceptablecondition,
6. Checkthe mower blade stopping time. The mower
bladesand mower drive belt should come to a complete
stop within five (5) seconds after the electric PTOswitch
is turned off.
AWARNING
To avoid serious injury, perform adjustmentsonlywith
engine stopped,key removedand rider on level
ground.
BladeBrakeCheck
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, PTOdisengagedand an
operator in the seat, start the engine engine.
2. Havean assistant observe the mower drive belt through
the opening betweenthe frame and top of mower deck.
Engagethe PTOand wait several seconds. Disengagethe
PTOand 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 PTOClutch Adjustment. If the belt
still does not stop within five (5) seconds, seeyour
dealer.
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