ED EPT20-15EHJ, Руководство по обслуживанию, Страница: 18 / 29

15
REV. 03/2015
4. Install the big piston seal and other parts in rever-
se order of the removal procedure.
i
The removal of big piston seal can be carried
out with tool A, B and C, and the method is the
same as that for pump seal, if so, the guide
bushing does not need to be loosened.
4.5 Other Issues
1.Hydraulic oil: anti-wear hydraulic oil ISO-32 is used
for general regions, it is recommended to use ISO
VG 15 hydraulic oil at extremely cold areas or cold
storage, the allowed oil volume within the pump is:
250~280mL.
Neither too much nor too little oil can make
the pump work properly, you can also visually
observe until the oil overflows from the filling
hole.
2. Daily inspection and maintenance are essential,
the appearance of the pump should always be
cleaned up to prevent big and small piston rods
from being scratched by foreign objects; lower the
vehicle to the bottom when idling, unload the loads
from the vehicle, the loads must not be placed on
the vehicle for a long time.
3. The commissioning shall be made every 6 mon-
ths, so that the control stem is always in the cor-
rect position.
4. Prior to the pump inspection, make sure the veh-
icle is lowered to bottom, otherwise, once the parts
on the pump are loosened, the high pressure liquid
inside can be ejected, and may lead to hazards.
5. Upon inspection, including prior to the inspection,
clean up the stains on the appearance first, and
clean up each part from time to time during the
inspection and cover all the exposed holes proper-
ly to prevent dirt from entering the system; welding
or grinding may generate dust, such operations
shall be prohibited at the site of pump repair.
6. After the repair or replacement of parts, the
parts shall be cleaned up first, make sure the
parts are thoroughly clean and then install again.
HYDRAULIC SYSTEM