7 MAINTENANCE
105
7.8 Hydraulic Filter Change
The hydraulic filters should be changed every 250 hours. Hydrostatic components
require extremely clean oil in order to have a long service life. Use caution when
changing the hydraulic filters. Before beginning the procedure, make sure the
machine is in a clean working environment. Take any necessary measures to pre-
vent dirt or debris from entering the hydraulic system.
To change the hydraulic filter:
1. Shut the machine down according to the procedure in section 5.13.
2. Allow the machine to cool, then release any residual pressure in the
hydraulic system by following the procedure in section 4.10 of this manual.
3. Raise the hood and lower the side panels to access the hydraulic filters
(items 2, fig. 7.7-2).
4. Clean around the filters, then thread the filters off and replace them.
Dispose of the used filters according to local mandates.
5. Reverse step 3 to complete the procedure.
Note: High flow equipped machines include a filter in the high flow auxiliary cir-
cuit case drain line. It protects the main hydraulic system in the event of cata-
strophic failure in a high flow attachment. This filter is designed to last the life of
the machine unless a high flow attachment equipped with a case drain has a
drive motor failure during use. (item 3 fig. 7.7-2)
Note: Should a hydraulic hose or fitting need to be removed for maintenance or
service, always inspect it for damage prior to re-installation. If none is found it
may be reused; if damaged, replace it.
7.9 Accessory Belts
The engine uses a belt to drive accessories. The accessory belt on the RT-75 /
RT-75HD is tensioned automatically, but should be visually inspected every 250
hours for tension, condition and presence prior to operation.
To check the belts:
1. Shut the machine down according to the procedure in section 5.13, allow
the machine to cool thoroughly.
2. Raise the hood and open the side panels at the rear of the machine.
3. Visually inspect any belts to make sure they are present, tight around the
pulleys and in good condition.
RT-75 / RT-75HD US O&M
0405-073 2020-07
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