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Troubleshooting, Adjustment & Service

Check the PTO clutch adjustment after the initial 25 
hour break-in period and then 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 46.  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 47.

 4.  Alternately tighten the adjustment nuts (B, Figure 

47) until the rotor face and armature face just 
contacts the gauge.

 5.  Check the windows for an equal amount of drag 

when the gauge is inserted and removed, and 
make any necessary adjustments by tightening or 
loosening the adjustment nuts.

 6.  Check the mower blade stopping time.  See 

BLADE BRAKE CHECK.  The mower blades and 
mower drive belt should come to a complete stop 
within seven (7) seconds after the electric PTO 
switch is turned off.

If the clutch is slipping or the clutch will not engage, 
the air gap can be adjusted by removing the re-gap 
shim to allow the clutch to continue to function.

 1.  Loosen both brake mounting bolts (A, Figure 48) 

1/2 to 1 full turn as shown in Figure 48.

Not 

for  

Reproduction