PT Series Operator & Parts Manual - McConnel

SHEAR BOLT PROTECTIONThe PTO shaft is fitted with a shear bolt overloadprotection to prevent damage to the machine if anobstacle is encountered during operation. Theshear bolt is located at the machine end of thePTO shaft.Shear Bolt location ►The procedure below should be followed whenreplacing or inspecting the shear bolt.Inspecting and/or Replacing the Shear Bolt Disengage the PTO. Park up and lower the machine on a firm level site. Switch off the tractor, apply the parking brakes and remove the starting key. Release the PTO guard restraining chains and disconnect the PTO shaft from the tractorend first, and then from the machine; this will now give access to the shear bolt forinspection and replacement. Inspect the machine, shaft and work area for possible causes of failure. Check that theblades rotate freely and are not fouling on the body. Remove any bolt remains from the universal joint, and replace the shear bolt with thecorrect grade replacement. Tighten the bolt to the correct torque setting. Re-connect the shaft to the machine and then to the tractor and attach the guardrestraining chains. Re-start the machine using the same procedure as for ‘Running the Machine for the FirstTime’ to check that it operates correctly.CAUTION: Only use the same size and grade of shear bolt as originally suppliedwith the machine - refer to the parts manual for genuine replacements.NOTE: Four spare shear bolts and nuts are supplied with the machine; these are to befound on the top of the ‘A’ frame assembly.31