Hyundai Robex 22-7, Service Manual

Page: 49 / 120

6-3 Maintenance procedure
6-3-1 Replacing the line filter
1. Stop the engine.
2. Remove the line filter (6-2-1) with a filter wrench.
3. Check whether any foreign matter is sticking inside the element. If necessary, replace
the cartridge assembly.
* In general, inspect and maintain line filters after the first 100 service hours, then
every 500 service hours.
6-3-2 Replacing the suction filter
1. Stop the engine.
2. Remove the bolts which retain the filter to the hydraulic oil tank, and pull off the filter.(6-
2-2).
3. Remove the suction filter to check whether the net of the element is damaged.
* Replace with a new one if the net is damaged or the mesh is widened.
6-3-3 Replacing the pilot filter
1. Stop the engine.
2. Remove the pilot filter (6-2-3) with a wrench (27 mm width).
3. Remove the filter to check whether the net of the element is damaged.
* Replace with a new one if the net is damaged or the mesh is widened.
6-3-4 How to clean the suction filter
1. Prepare a can with clean treated oil. Immerse the element in it.
2. Using a brush, wash out foreign matter sticking to the element. Use a hard brush if the
element is heavily stained.
3. After cleaning, blow compressed air inside the strainer to blow off the treated oil.
4. While cleaning the element, check the hydraulic oil tank at the same time, remove any
sediment inside the tank and rinse out the tank.
5. Attach pipes to install the filter to the tank. When installing the filter, fit the O ring in the
flange side groove firmly so that hydraulic oil does not leak.
6. Add new hydraulic oil through the hydraulic oil intake.
Total amount of hydraulic oil : 33
6-4