Summary of Contents for Bosch Rexroth H-4WEH...XE Series
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4/2 and 4/3 directional valves, internally pilot-operated, externally pilot-operated (Area of application according to the explosion protection directive 2014/34/EU: II 2G) Type H-4WEH...XE... Operating instructions Replaces: 09.13 RE 24751-XE-B/04.16 English...
10.2 Inspection and maintenance 10.3 Maintenance schedule 10.4 Repair 10.5 Rectifying external leakages 10.6 Spare parts Disassembly and removal Disposal 12.1 Environmental protection 12.2 Return to Bosch Rexroth AG 12.3 Packaging 12.4 Materials used RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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4/52 12.5 Recycling Extension and modification Troubleshooting 14.1 How to proceed for troubleshooting Technical data Appendix 16.1 List of addresses Declaration of conformity Alphabetical index Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
"General information on damage to property and damage to product" and whenever a sequence of actions or instructions is explained which bear the danger of personal injury or damage to property. The hazard avoidance measures described must be observed. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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The numbers indicate that the actions must be carried out one after the other. 1.3.3 Abbreviations The following abbreviations are used in this documentation: Table 4: Abbreviations Abbreviation Meaning ATEX EU Explosion Protection Directive (Atmosphère explosible) European Standard International Organization for Standardization Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
EU explosion protection directive 2014/34/EU. According to directive 2014/34/EU, the device group, category and temperature class to which the valve corresponds are indicated in the "Area of application" section of the data sheet. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
Changes and/or modification at the valve are not admissible, see chapter 13 "Extension and modification". Bosch Rexroth AG does not assume any liability for damage caused by improper use. The user assumes all risks involved with improper use. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
• Understanding of the additional importance of work permit systems and safe electrical separation regarding explosion protection Bosch Rexroth offers measures supporting training in specific fields. You can find an overview of the training contents on the Internet at: http://www.boschrexroth.de/didactic...
• Do not commission the product until you can be sure that the end product (for example a machine or system) where the Rexroth product is installed complies with the country-specific provisions, safety regulations and standards of the application. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
▶ Before working at the valve, ensure that the hydraulic system is depressurized and the electrical control is de-energized. ▶ Completely unload the pressure at machines and systems before working at the valve. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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▶ Exchange valves with corrosion damage at an early stage. ▶ Check the surface protection at the valve and the valve mounting screws at regular intervals. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
The values for the residual voltage peak depend on the valve solenoid used, see the "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
The machine end-user is obliged to check in the order confirmation whether the supplied valve complies with the required category and the corresponding zone. The machine end-user of the Bosch Rexroth valve is responsible that • the valve is only used according to the intended use as defined in these operating instructions.
Hydraulic fluid harmful to the environment! Leaking hydraulic fluid leads to environmental pollution. ▶ Immediately remedy possible leakage. ▶ Dispose of the hydraulic fluid in accordance with the currently applicable national regulations in your country. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
Check the scope of delivery for possible transport damage, see chapter 6 "Transport and storage". In case of complaints, please contact Bosch Rexroth AG, see chapter 16.1 "List of addresses". Accessories such as valve subplates and valve mounting screws are not included in the scope of delivery and must be ordered separately.
Manufacturer's factory number e.g. 7081 Date of manufacture (year and week) e.g. FD: 03w01 Maximum operating pressure e.g. pmax 350 bar Ambient temperature range –20 °C ≤ Ta ≤ +60 °C Graphic Hydraulic symbol according to ISO 1219 RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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Explosion protection mark II 2G c T4X Mark according to the explosion protection directive 2014/34/EU and mark for the type of protection of the mechanical part according to EN 13463-5 Rexroth QR code QR code Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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Hydac data matrix code Dependent on valve sizes and the configuration of the solenoid coils, higher ambient temperatures up to 70 °C are admissible. Also observe the "Special conditions for safe use" in "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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Potentially explosive atmospheres in which an explosive atmosphere due to blown up dust (=device group II) does not normally occur or only rarely or for a short time. Corresponds to zone 22 according to directive 1999/92/EC. Standard level of safety. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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Table 9: Temperature classes for device group II Temperature class Maximum surface temperature 450 °C 300 °C 200 °C 135 °C 100 °C 85 °C RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
Danger of cut injuries! ▶ Wear suitable protective equipment when transporting the valve. More information regarding transport is available from Bosch Rexroth, see chapter 16.1 "List of addresses". Notify your responsible sales contact person about any transport damage within one week. The addresses of the sales subsidiaries can be found on the Internet at: http:/www.boschrexroth.com/adressen...
Pack the valve with a desiccant air-tightly in corrosion protection film. Store the valve protected against impacts. ▶ In each case, please observe any applicable provisions and laws regarding the handling of substances hazardous to water or to health. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
It is imperative to provide for absolute cleanliness. The valve must be protected from dirt during installation. Contamination of the hydraulic fluid may considerably reduce the life cycle of the valve. ▶ Observe the installation position specified in "Data sheet 24751-XE". Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
ISO 4762-M6x60-10.9- 0.09...0.14 flZn-240h-L H-4WEH25... ISO 4762-M12x60-10.9- 0.09...0.14 R913000121 flZn-240h-L H-4WEH32... ISO 4762-M20x80-10.9- 0.09...0.14 R901035246 flZn-240h-L Subplates For subplates with dimensions for valves with porting pattern according to ISO 4401, refer to "Data sheet 45100". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
Consequently, persons may slip or fall. ▶ Only remove the protective caps of valve directly before the assembly. ▶ After the disassembly, provide the bores containing the hydraulic fluid with suitable closing elements. ▶ Immediately remove leaked hydraulic fluid. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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Make sure that all pipes and hose lines and every combination of connection pieces, couplings or connection points with hoses or pipes are checked for their operational safety by a person with appropriate knowledge and experience. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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▶ Only use connection lines without shielding or armoring. For information on the prescribed pre-fuse, refer to "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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15 cm of the cable bushing. Connection of the valve solenoid is polarity-independent. Valve solenoids for connection to alternating voltage have a bridge rectifier which is integrated in the vale solenoid. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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Remove the outer sheath of the connection line and the insulation of the individual conductors. Press the wire end ferrule on the individual conductors. For the stripping lengths, refer to fig. 5 and table 14. Fig. 5: Stripping lengths RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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Tightening torque of the double nipple (2): 8...10 Nm Assemble the plug screw. Tightening torque of the plug screw 7...9 Nm Assemble the solenoid coil (see chapter 7.7.4 "Rotating the solenoid coil by ± 90°"). Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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Assemble the O-ring onto the pole tube and slide it forward up to the solenoid coil. Re-tighten the mounting nut of the valve solenoid (hexagon nut, wrench size 32, tightening torque 4 + 1 Nm). RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
Condensed water may form inside the terminal box and cause a short-circuit! ▶ Allow the valve to acclimatize for some hours prior to commissioning as the electronics might be damaged by the generation of condensed water. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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For order details for seal kits, please refer to chapter 10.6 "Spare parts". Valve-specific internal leakage may occur but does not have any influence on the functionality of the valve. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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Fig. 7: Setting the switching time Remove the protective cap (wrench size 20) (1). Loosen the lock nut (3) (wrench size 10). Change the switching time by rotating the set screw (internal hexagon, size 5) (2). Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
Changing the settings at the valve is not admissible. For information on the operation, please refer to the operating instructions for the hydraulic system into which the valve is installed. If errors occur, refer to chapter 14 "Troubleshooting". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
The manual override is only intended for manual operation. It is not suitable for frequently recurring manual operation. The manual override is located on the side of the valve solenoid facing away from the valve. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
The date of manufacture of the valve can be seen on the name plate, see chapter 5.1.1 "Information on the name plate and the valve solenoid housing". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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The sealing elements are only intended for single use. Assemble the cover of the terminal box with the seal beneath it. Tighten the mounting screws with the spring washers diagonally, one after the other. Tightening torque of the cover screws: 1...1.1 Nm Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
10.3.1 Checking for leakage Check the valve for leakage. Early detection of hydraulic fluid loss may help you identify and remedy errors. Bosch Rexroth therefore recommends always keeping the valve and/or the system clean. 10.3.2 Checking for noise development Check the valve for noise development.
Rexroth service. Bosch Rexroth AG Service Hydraulics Bürgermeister-Dr.-Nebel-Str. 8 97816 Lohr am Main Phone: +49 (0) 9352 - 40 50 60 spare.parts@boschrexroth.de For the addresses of our sales and service network, please refer to: www.boschrexroth.com/adressen Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
Close the valve connection surface using the protective plate supplied or protect it using equivalent packaging in order to avoid contamination and damage. Seal the subplate in order to avoid contamination. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
The materials for disposable packaging are mostly cardboard, wood, and expanded polystyrene. They can be recycled without any problems. For ecological reasons, disposable packaging should not be used for returning products to Bosch Rexroth. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
45/52 12.4 Materials used Hydraulic components from Bosch Rexroth do not contain any hazardous materials that could be released during intended use. In the normal case, no negative effects on human beings and on the environment have to be expected.
If so: What were they? – Was the valve or machine used as intended? – How did the fault become apparent? ▶ Try to get a clear idea of the cause of error. Ask the direct (machine) operator. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
Zum Eisengießer 1 97816 Lohr am Main Germany Phone +49 (93 52) 18 - 0 Email info@boschrexroth.de The addresses of our sales and service network and sales organizations can be found at www.boschrexroth.com/adressen Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
▶ M ▶ U Maintenance schedule Unpacking Main valve Manual override ▶ V Modification Validity of the documentation Valve mounting screws ▶ n Valve use Name plate ▶ O Obligations of the machine end-user Operation Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
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Alphabetical index 51/52 RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
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Bosch Rexroth AG Zum Eisengießer 1 97816 Lohr am Main Germany Phone +49 9352 18-0 info@boschrexroth.de www.boschrexroth.com Subject to change without notice Printed in Germany RE 24751-XE-B/04.16...