CHECK / ADJUST PTO CLUTCH
WARNING
To avoid serious injury, perform adjustments only with engine stopped, key removed and tractor on level ground.
Service Interval: 200 Hours.
The Power Take Off (PTO) clutch drives the mower blades. The PTO clutch is engaged and disengaged by the mower blade switch. Check the PTO clutch adjustment every 200 hours of operation. Also perform the following procedure if the clutch is slipping, 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.
A
B
B
B
Figure 33. PTO Clutch Adjustment
A.Adjustment Window (Qty. 3, one shown)
B.Adjustment Nut
2. |
| Reproduction | B | |
See Figure 33. Note the position of the 3 adjustment | A | |||
| windows (A) in the side of the brake plate and the |
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| nylock adjustment nuts (B). |
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3. | Insert |
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| through each window, positioning the gauge between |
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| the rotor face and the armature face as shown in |
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| Figure 34. |
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4. | Alternately tighten the adjustment nuts (B, Figure 33) | C |
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| until the rotor face and armature face just c ntacts |
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| the gauge. |
| Figure 34. Adjust PTO Clutch |
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5. | Check the windows for an equal amount of tension | A. Win ow |
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| when the gauge is inserted and removed, and make | B. Adjustment Nut |
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| any necessary adjustments by tightening or | C. Feeler Gauge |
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| loosening the adjustment nuts. |
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NOTE: The actual air gap between the rotor and armature may vary even after performing the adjustm nt procedure. This is due to dimensional variations 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. If adjustment does not stop a mower braking problem, replace the electric PTO clutch.
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