Part No. 139378 Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N 3 - 9Section 3 • Scheduled Maintenance ProceduresJune 2011REV AA-6Replace the Drive Hub OilNote: Manufacturer drive hub specifications requirethat this one-time procedure be performed after thefirst 150 hours.Replacing the drive hub oil is essential for goodmachine performance and service life. Failure toreplace the drive hub oil after the first 150 hours ofuse may cause the machine to perform poorly andcontinued use may cause component damage.1 Select the drive hub to be serviced. Drive themachine until one of the two plugs is at thelowest point.2 Remove both plugs and drain the oil into asuitable container.3 Drive the machine until one plug is at the topand the other is at 90 degrees.a drive hub plugs4 Fill the hub with oil from the top hole until the oillevel is even with the bottom of the side plughole. Refer to Section 2,Specifications.5 Install the plugs into the drive hub.6 Repeat this procedure for the other drive hub.CHECKLIST A PROCEDURESa
