Pto Clutch Adjustment; Blade Brake Check - Snapper 285Z Operator's Manual

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Figure 19. PTO Clutch Adjustment

PTO Clutch Adjustment

Check the PTO clutch adjustment after the initial 25 hour break-
in period and then 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 19. 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 20.
4. Alternately tighten the adjustment nuts (B, Figure 19) 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 neces-
sary 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 with-
in five seconds after the electric PTO switch is turned off.
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Adjustments and Service
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C
Figure 20. Adjust PTO Clutch
WARNING
To avoid serious injury, perform adjustments only with
engine stopped, key removed and rider on level ground.

Blade Brake Check

Mower blades and mower drive belt should come to a complete
stop within five seconds after electric PTO switch is turned off.
1. With parking brake engaged, PTO disengaged and an
operator in the seat, start the 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 seconds,
perform the PTO Clutch Adjustment. If the belt still does
not stop within 5 seconds, see your dealer.
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