PT Series Operator & Parts Manual - McConnel

Blades & BushesThe cutting blades are mounted in hardened bushes and are free-swinging to reduce shockload and damage to the transmission.Blades and blade bushes should be inspected for wear/damage the intervals stated in themaintenance schedule.Replace blades that are bent, excessively nicked, damaged, or when they are worn beyondthe shape of their original profile. Always replace blades immediately when their level ofwear or damage causes rotor vibration; continued use of the machine in this condition couldcause damage to gearbox and/or drive components. Blades must always be replaced inopposing pairs to retain rotor balance.Replace bushes and blade fixings immediately should excessive signs of wear or damage bedetected.1) Retaining Bolt2) Blade3) Retaining Nut4) Hardened Bush5) Blade CarrierWARNING: Ensure that the machine is safely supported using suitable lifting and supportequipment before attempting to work beneath a machine – never use or rely on the tractor’shydraulic system to support the machine.Blade & Blade Bush RemovalRemove the retaining bolt and nut and dismantle the blade and bush.Blade and/or Blade Bush ReplacementReplace the blade and/or the bush and reassemble to the carrier with a new nut and bolt.Tighten the retaining bolt and nut bolt as specified in ‘Specific Torque Settings’ chart.NOTE: On Twin Rotor machines the cutting blades on the left and right blade carriers are notinterchangeable.41