Replacing The Sealing Rings At The Base Of The Valve Body; Product Maintenance; Spare Parts Supplied - Voith Argo Hytos Rperx3-06 Bedienungsanleitung

7.6.2 Replacing the sealing rings at the base of the valve body

In case of leaks in the dividing plane, the sealing rings must be replaced with new ones. The disassembly and reassembly procedure is similar.
› Ensure that no explosive atmosphere is present during the repair (see also 7.5)
› Switch off the pressure source (pump) of the hydraulic circuit (see also 7.5)
› Lighten the hydraulic circuit including the accumulators by connecting it to the tank (see also 7.5)
› Ensure that the hydraulic circuit is depressurised (see also 7.5)
› Switch off the electrical supply to the directional control valve solenoids (see also 7.5)
› Make sure that the surface of the valve and solenoid coils is cooled to a low enough temperature to prevent skin burns (see also 7.5)
› Clean the surface and surroundings of the directional control valve
› Loosen and unscrew the four fastening screws M5x45 DIN 912 using the inbus wrench A/F 4. Carefully remove the valve from the
connection plate
› Allow the remaining working fluid from the valve to drain into the prepared smaller container
› Using a small screwdriver, remove the sealing rings from the recess in the body
› Work carefully to avoid damaging the sealing surfaces
› Clean the connection surfaces of the valve body and plate. Check them for damage
› Insert new sealing rings into the recesses in the valve body so that they do not fall out when the valve is reassembled
› Insert the four fastening screws into the holes in the valve body and fasten the valve to the plate using the inbus wrench A/F 4. Tighten
the screws in a crosswise sequence to the specified torque of 8.9+1 Nm. Uneven tightening may cause deformation of the body and
unreliable valve function.
› If any of the fixing screws are damaged, replace them
WARNING
› Check that the coil cables in the cable gland and the earth wires are properly secured to ensure that they are not loose when the valve is handled.
› After the repair, verify the new seals are tight and the valve is working properly.

7.7 Product maintenance

During normal operation, keep the valve clean and free of dust deposits on the surface. Deposits both impair cooling of the valve and coils and can
form flammable layers prone to ignition. Depending on the conditions of use, check the hydraulic circuit for leaks, the electrical parts including cables
for damage and the valve and position sensor for correct operation at appropriate intervals. The check should be performed every time the device is
started, but at least once a week during long-term operation.

7.8 Spare parts supplied

Ordered as spare parts:
see catalog SP 8010
Item Description of spare part
1 Coil fastening nut
2 Seal Seal under the nut
3 Sealing ring actuating system - coil
4 Terminal box lid seal
5 Seal set
6 Valve mounting screws
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Operating instructions_RPERX3-06_14095_3en_07/2024
Valve mounting screws
The screws must be high tensile screws (SCREW M5x45 DIN 912 10.9), preferably from the valve manufacturer.
A screw of normal tensile can be broken due to the high pressure in the hydraulic circuit and can cause
massive leakage of the working fluid.
6
1
1
5
Designation
Nut
O-ring 21.89x2.62 VMQ 70 (silicone)
O-ring 22x1.5 VMQ 50 (silicone)
O-ring 22x1.5 VMQ 50 (silicone)
4x Square ring 9.25x1,68 NBR
4x M5x45 DIN 912 10.9
Order number
45904300
34950700
15845200
15845100
4 2
3
1
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