Service and Maintenance BX36S3PH Self-feed Chipper4015.4 Driveline MaintenanceThe PTO drive line is designed to telescope to allow fordimensional changes as the machine goes through itsoperational range.A heavy duty plastic tubular guard encloses the drivingcomponents and is designed to turn relative to thedriving components.The drive line should telescope easily and theguard turn freely on the shaft at all times. Annualdisassembly, cleaning and lubrication is recommendedto insure that all components function as intended.Ensure that the universal joints are lubricated, inspectand lubricate every 8 hours.When reassembling the driveline, ensure thatthe driveline is assembled "in phase", to avoidunnecessary vibration when the machine is running.15.5 Shear PinThe PTO drive line is designed with a shear pin at theinput yoke to prevent overloading the drive system.Remove the broken parts from the yoke when the pinshears and replace with genuine Wallenstein parts.The drive system is designed to function well withoutfailing the shear pin. If it does fail, generally it isbeing fed too fast or something very hard has beenjammed into the rotor or between the blades. Alwaysunplug the system and determine the cause of theproblem and correct it before resuming work. Shear pinreplacements are available from your dealerPlastic GuardGuard LubricationPointsU-joint LubricationpointTelescopingShaftFig. 27 ā Driveline Maintenance