Maintenance Manual
March 2022
Programmed Maintenance Procedures
158
S
®
Booms • Z
®
Booms
Part No. 1268489GT
P1-2
Replace the Drive Hub Oil
Drive hub specifications require that this procedure
be performed after the first 50 hours of operation.
After the initial oil replacement, specifications
require that this procedure be performed every
1000 hours.
Replacing the drive hub oil is essential for good
machine performance and service life. Failure to
replace the drive hub oil may cause the machine
to perform poorly and continued use may cause
component damage.
Drive Hubs:
1 Select the drive hub to be serviced. Drive the
machine until one of the two plugs is at the
lowest point.
2 Remove the plugs and drain the oil into a
suitable container.
3 Drive the machine until one of the two plugs is
at the highest point.
1 drive hub plugs
2 middle plug
4
Drive hubs with 2 plugs
: Fill the hub until the
oil level is even with the bottom of the lowest
plug hole. Refer to Specifications,
Hydraulic
Specifications
.
Drive hubs with 3 plugs
: Fill the hub until the
oil level is even with the bottom of the middle
plug hole. Refer to Specifications,
Hydraulic
Specifications
.
5 Install the plugs into the drive hub.
6 Repeat this procedure for each drive hub.