Briggs & Stratton 150Z Series manual Check / Adjust PTO Clutch

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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.

2.See Figure 24. 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 .012”-.015” (2,5-4mm) feeler gauge (C) through each window, positioning the gauge between the rotor face and the armature face as shown in Figure 25.

4.Alternately tighten the adjustment nuts (B, Figure 24) 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 seconds after the electric PTO switch is turned off. If adjustment does not stop a mower braking problem, replace the electric PTO clutch.

A

B

B

B

Figure 24. PTO Clutch Adjustment

A.Adjustment Window (Qty. 3, one shown)

B.Adjustment Nut

B

A

C

Figure 25. Adjust PTO Clutch

A.Window

B.Adjustment Nut

C.Feeler Gauge

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Contents 20HP Zero-Turn Riders OPERATOR’S ManualPage Table of Contents General Operation Safety RulesIgnition System Only Ride UP and Down Hill Not Across Hill Degrees MAX Safe Handling of Gasoline Service & Maintenance2690716 Safety & Operation DecalsMfg. No ID Tag Identification NumbersEngine Speed Control OperationControl Functions Ground Speed Levers Parking BrakeGeneral Operating Safety Fuel Recommendations Checks Before StartingMowing Emergency StoppingStopping the Rider & Engine Starting the EngineReverse Travel Practice Driving PracticeSmooth Travel Forward Travel PracticeExecuting an End-Of-Row Zero Turn Practice Turning Around a CornerPractice Turning In Place Executing TurnsRemoving the Mower Deck Mower Deck Removal InstallationInstalling the Mower Deck 20HP Briggs & Stratton MaintenanceMaintenance Schedule Rider MAINTENANCE, All ModelsCheck Tire Pressure Accessing the Engine CompartmentClean Debris from Rider Engine Compartment Clean Debris from Engine Cooling Areas and AIR Filter Oil Lubrication Grease Blade Removal Clean Deck Check / Replace Mower BladesOperational Safety Checks Clean the Battery and CablesCheck Rider Safety System Adjust PTO Clutch Window Adjustment Nut Feeler Gauge Check / Adjust PTO ClutchChange Engine OIL & Filter Check Engine OIL LevelChange Engine OIL Air Filter Removal & Installation Service AIR Filter PRE-CLEANERReplace Spark Plug Pre-Cleaner ServiceAir Filter Service Pre-Cleaner Cutting Height Adjustment Service & AdjustmentsGround Speed Control Lever Adjustment Speed Balancing Adjustment62cm Brake AdjustmentBattery Charging Engine AdjustmentsSide to Side Leveling Mower Deck Leveling AdjustmentsFront To Back Leveling Mower Belt ReplacementMower Drive Belt Replacement After Storage StorageStorage Before StorageTroubleshooting the Rider TroubleshootingTroubleshooting the Mower Chassis SpecificationsService Items Engine TransmissionPage HOW High to MOW the Grass HOW and When toWATER, Fertilize AerateProper Mowing Speed When and HOW Often to MOW
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