Product Manual

wc_tx004502gb.fm

General Maintenance RD12A/12K

7.12 Checking the Hydraulic Oil Level

A hydraulic oil level sightglass (a) is located on the side of the hydraulic fluid

reservoir.

While the machine is turned off, check that the hydraulic oil level is between the

minimum and the maximum levels in the sightglass. If it is not, add oil through the

filler port (b) inside the engine compartment. Use only clean hydraulic oil.

Thoroughly clean the top of the filler cap before removing it from the tank. Care

should be taken to prevent small dirt particles from entering the system.

If hydraulic oil continually needs to be added, inspect hoses and connections for

possible leaks.

7.13 Changing the Hydraulic Oil and Filter

Set all controls in neutral, stop the engine, and allow the engine and fluids to cool

before performing this procedure.

All oils eventually shear or thin out with use, reducing their lubricating ability. In

addition, heat, oxidation, and contamination may cause the formation of sludge,

gum, or varnish in the system. For these reasons, it is important to change the

hydraulic oil at specified intervals. See Maintenance Schedule.

1. Remove the filler cap from the top of the hydraulic tank.

2. Remove the drain hose from the clip, and direct the hose toward the front corner

of the machine.

3. Remove the drain cap on the drain hose and allow the hydraulic fluid to drain.

Note: In the interests of environmental protection, place plastic sheeting and a

container under the machine to collect the liquid which drains off. Dispose of this

liquid properly.

4. Unscrew the return line filter and replace the filter cartridge.

5. Install the drain cap on the drain hose and tighten.

6. Replace the drain hose into the clip.

7. Fill the hydraulic tank through the filler port with clean hydraulic fluid.

8. Bleed the hydraulic system. See section Bleeding the Hydraulic System.

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