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3/2, 4/2 and 4/3 directional valves,
ProductName
pilot operated
ProductDescription
Type
4WEH and 4WH
Operating instructions
DocumentType
Applies to the following types:
Applies to the following types:
3WEH10
4WEH10
3WEH16
4WEH16
3WEH22
4WEH22
3WEH25
4WEH25
3WEH32
4WEH32
3WH10
4WH10
3WH16
4WH16
3WH22
4WH22
3WH25
4WH25
3WH32
4WH32
Product Picture
FigureCaption_Cover
H-3WEH10
H-3WEH16
H-3WEH22
H-3WEH25
H-3WEH32
H-3WH10
H-3WH16
H-3WH22
H-3WH25
H-3WH32
RE 24751-B/06.09
English
Product Picture
FigureCaption_Cover
H6092
H5589
4WH22
4WEH16
H-4WEH10
.WEH10...QM
H-4WEH16
.WEH16...QM
H-4WEH22
.WEH22...QM
H-4WEH25
.WEH25...QM
H-4WEH32
.WEH32...QM
H-4WH10
.WH10...QM
H-4WH16
.WH16...QM
H-4WH22
.WH22...QM
H-4WH25
.WH25...QM
H-4WH32
.WH32...QM
Product Picture
FigureCaption_Cover
H6093
4WEH22, 4WEH10
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Table of Contents
Related Manuals for Bosch WEH10 QM Series
Summary of Contents for Bosch WEH10 QM Series
- Page 1 3/2, 4/2 and 4/3 directional valves, RE 24751-B/06.09 ProductName pilot operated English ProductDescription Type 4WEH and 4WH Operating instructions DocumentType Product Picture Product Picture Product Picture FigureCaption_Cover FigureCaption_Cover H6092 H5589 FigureCaption_Cover H6093 4WH22 4WEH16 4WEH22, 4WEH10 Applies to the following types: Applies to the following types: 3WEH10 4WEH10...
- Page 2 © This document, as well as the data, specifica- tions and other information set forth in it are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent.
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Page 3: Table Of Contents
10.1 Preparing the components for storage/further use ......... 38 11 Disassembly and replacement ..............39 12 Disposal ......................40 12.1 Environmental protection ................ 40 12.2 Return to Bosch Rexroth AG ..............40 12.3 Packagings ..................... 40 12.4 Materials used..................40 12.5 Recycling ....................41... - Page 4 4/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Contents 13 Extension and conversion ................41 13.1 Optional accessories................41 14 Troubleshooting .................... 43 14.1 How to proceed for troubleshooting ............43 15 Technical data ....................45 16 Appendix ......................46 16.1 Project/installation drawings ..............
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Page 5: About This Document
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 5/48 About this document 1 About this document These operating instructions are valid for Rexroth 3/2, 4/2, and 4/3 directional valves, pilot operated. These instructions contain important information on the safe and appropriate assembly, transport, commissioning, operation, maintenance, disassembly and simple troubleshooting of the valve. -
Page 6: Related Documents
6/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 About this document Table 2: Main product features for type .WEH... and H-.WEH... Type Size Com- Max. Max. operating Max. operating Max. operating Rated flow ponent operating pressure T pressure T pressure Y... -
Page 7: General Safety Instructions
Bosch Rexroth. After disassembly of the spool position monitoring, the complete valve may only be assembled and re-adjusted by authorized experts or by Bosch Rexroth. Improper use Any use of the valve other than described in section "2.1 Intended use" is consid- ered as improper. -
Page 8: Qualification Of Personnel
8/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 General safety instructions Qualification of personnel Assembly, commissioning and operation, disassembly, service (including mainte- nance and repair) require basic mechanical, electrical and hydraulic knowledge, as well as knowledge of the appropriate technical terms. In order to ensure opera- tional safety, these activities may only be carried out by corresponding experts or an instructed person under the direction and supervision of an expert. -
Page 9: Adhere To The Following Instructions
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 9/48 General safety instructions Adhere to the following instructions General notes • Observe the regulations on accident prevention and environmental protection for the country where the product is used and at the workplace. - Page 10 10/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 General safety instructions DANGER! Risk of burning! During operation without hydraulic fluid and with simultaneous switching, the valve surface reaches temperatures high enough for you to burn yourself. The hydraulic fluid is necessary for cooling the solenoid. The max. hydraulic fluid temperature is 80 °C.
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Page 11: Obligations Of The Operator
6. We thus recommend to handle and/or dispose of the bio-degradable medium used according to the regulations for non-bio-degradable media. Obligations of the operator The operator of the valve from Bosch Rexroth is bound to provide for personnel training on a regular basis regarding the following subjects: •... -
Page 12: Safety Equipment
The operator must provide personal protective equipment (e.g. gloves, safety shoes, safety goggles, overall, etc.). Touch guard As protection against the hot solenoid surfaces, Bosch Rexroth recommends the installation of a touch guard so that unwanted contact with the hot surface can be avoided. -
Page 13: Product Identification
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 13/48 Product description Product identification Information on the name plate The meaning of the details on the name plate can be found on the basis of the enumerated fields from the following figures and the table. - Page 14 14/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Product description Table 6: About the name plate Type of information Information or example Manufacturer's logo Rexroth R901234567 Material no. of the valve (= order no.) e.g.: Type designation complete valve H-4WEH...
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Page 15: Transport And Storage
The information on the weight of your valve is contained in the Technical data sheet. Transport damage must be reported within one week to Bosch Rexroth to the following address: Bosch Rexroth AG Service Industriehydraulik [Industrial hydraulics] Bürgermeister-Dr.-Nebel-Straße 8... -
Page 16: Transport By Hand
Type of attachment or pick-up of the load. Ensure that the lifting gear's lifting capacity is sufficient in order to transport the valve without risk. Use textile attachment devices – according to DIN EN 1492-2. More information regarding the transport is available from Bosch Rexroth. -
Page 17: Storage
Bran-O-Rost protective oil • After opening the transport packaging, it must be closed properly again for the storage In case of storage of more than six months or in case of sea transport, coordination with Bosch Rexroth is required. -
Page 18: Assembly
18/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Assembly Assembly Unpacking Dispose of the packaging in accordance with the national regulations of your country. DANGER! Risk of personal injury and damage to property! In case of improper opening of the packaging, components of the valve may fall out and cause damage to the components or even injuries as the components may be sharp-edged, heavy, oily, unstable, loose and bulky. -
Page 19: Installation Conditions
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 19/48 Assembly Installation conditions For installing the product always observe the environmental conditions specified in the technical data (see "Technical data sheet"). Installation position See "Technical data sheet" The assignment of the valves to the technical data sheets is contained in table 3 on page 6. -
Page 20: Required Tools
In order to install the valve, you need standard tools only. Required accessories In order to assemble the valve, you need the following accessories, which are not included in the delivery and can be ordered from Bosch Rexroth. • Valve mounting screws Due to reasons of stability, only the following valve mounting screws have to be used. -
Page 21: Rotating The Solenoid Coil
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 21/48 Assembly Table 7: Valve mounting screws Size Hexagon socket head cap screws Quantity Tightening torque Material no. Size 10 ISO 4762 - M6 × 45 - 10.9 12.5 Nm ± 10 % R913000258 1/4-20 UNC ×... -
Page 22: Assembling The Valve
22/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Assembly Assembling the valve Have sufficiently dimensioned collection containers, enough cleaning cloths and medium-binding materials ready in order to collect or bind leaking medium. DANGER! Risk of personal injury and damage to property! Incorrectly assembled valves can cause substantial material damage and per- sonal injuries. - Page 23 WARNING! Risk of material damage and personal injuries due to improper installation! The use of mounting material not approved of by Bosch Rexroth and erroneous installation may result in damage to the valve, adjacent components, as well as personal injuries due to escaping pressurized hydraulic oil.
- Page 24 24/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Assembly Hydraulic connection of the valve Depressurize the relevant part of the system. CAUTION! Risk of injury when assembling under pressure! If you fail to depressurize the product before starting the assembly, you may suf- fer injury and also damage the device or system components.
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Page 25: Installing The Electrical System
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 25/48 Assembly Installing the electrical system De-energize the relevant part of the system. CAUTION! Risk of injury when assembling under voltage! If you do not switch off voltage supply before assembling the product, you may get injured or the valve or system components may be damaged. - Page 26 26/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Assembly The solenoid coil can be connected in a polarity-independent way. Only the mating connectors mentioned in the "Technical data sheet" or mating connectors of the same type may be used. Observe the installation instructions printed on the packaging of the mating connector and the tightening torques specified there.
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Page 27: Changing The Pilot Oil Supply And Return
The valve can be converted to other modes of operation; this may only be done by the Bosch Rexroth Service or an authority authorized by Bosch Rexroth. After a conversion of the pilot oil supply and/or return, the coded type designa- tion printed on the name plate of the valve does not specify the current status any more and must thus be corrected. -
Page 28: Commissioning
Check whether there is an internal leakage. This has to be done according to the possibilities offered by the hydraulic system. There may be an internal leakage due to the specific valve. This has, how- ever, no influence on the valve's functionality. For information regarding this topic, please contact Bosch Rexroth. -
Page 29: Operation
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 29/48 Commissioning | Operation Operation Performing a functional test If possible, firstly check hydraulic functions in a controlled form and with low pressure; observe the operating instructions of the hydraulic system into which the valve has been installed. -
Page 30: Pressure Reduction
Operation Conversion of the switching time adjustment The switching time adjustment of the valve may only be converted by the Bosch Rexroth Service or an authority authorized by Bosch Rexroth. After a conversion of the switching time adjustment, the coded type designa- tion printed to the name plate of the valve no longer gives the current status and thus has to be corrected. -
Page 31: Operating The Manual Override
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 31/48 Operation Operating the manual override Operation of the manual override is only applicable to the subsequently listed types, see table 8: The type can be determined via the component in the type designation of the pilot control valve, see table 6 on page 14 or the "Technical data sheet". -
Page 32: Modifying The Stroke
32/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Operation Modifying the stroke WARNING! Risk of personal injuries and damage to property due to pressurized and energized system components. Works on pressurized and energized system components entail the risk of injuries caused by escaping hydraulic oil or electric shocks. -
Page 33: Maintenance
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 33/48 Operation | Maintenance Maintenance Tighten the lock nut using a torque power screwdriver with a tolerance of 10 % clockwise , see table 10. ± Table 10: Details with regard to the adjustment spindle... -
Page 34: Cleaning And Care (Maintenance)
34/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Maintenance Cleaning and care (maintenance) CAUTION! Penetrating dirt and liquids will cause faults! Safe function of the valve is no longer ensured. Always provide for absolute cleanness when working on the valve. - Page 35 RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 35/48 Maintenance De-energize the electrical connection line. Remove external coarse dirt. CAUTION! Personal injuries and material damage due to electrostatic charging! In order to prevent electrostatic charging, only use a damp cloth to clean the coil and the mating connector.
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Page 36: Repair
Order spare parts in writing. In urgent cases you can also order by phone, but you are kindly requested to confirm your order in writing e.g. by fax. Please send your spare parts order to the Bosch Rexroth service next to you or directly to the headquarters (see section "16.2 Address directory" on... - Page 37 RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 37/48 Maintenance When ordering spare parts, please indicate the following information from the product's name plate: – The serial number Please indicate the following details from the parts list: – The material number Additionally indicate: –...
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Page 38: Decommissioning
38/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Decommissioning Maintenance | Decommissioning Information on the seal kits of the pilot control valve is available in their operating instructions. Please observe the suitability of the sealing materials for the hydraulic medium used! See "Technical data sheet". -
Page 39: Disassembly And Replacement
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 39/48 Disassembly and replacement Disassembly and replacement WARNING! Risk of personal injuries and damage to property due to pressurized and energized system components. Works on pressurized and energized system components entail the risk of injuries caused by escaping hydraulic oil or electric shocks. -
Page 40: Disposal
Please observe the following supplied notes for the environmentally-friendly disposal of the valve. 12.2 Return to Bosch Rexroth AG The products manufactured by us can be returned to us for disposal purposes at no costs. However, the precondition is that there are no spurious adherences or any other contamination. -
Page 41: Recycling
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 41/48 Disposal | Extension and conversion Extension and conversion 12.5 Recycling Due to the high share of metal, the products can mostly be recycled. In order to achieve an ideal metal recovery, disassembly into individual assemblies is required. - Page 42 42/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Extension and conversion Throttle inserts Details on throttle inserts are available in the operating instructions of the pilot control valve because they can be mounted in channel P of the pilot control valve.
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Page 43: Troubleshooting
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 43/48 Troubleshooting Troubleshooting 14.1 How to proceed for troubleshooting Always work systematically and focused, even when under time pressure. Random and imprudent disassembly and readjustment of settings can, in the worst-case scenario, result in the inability to determine the original cause of the fault. - Page 44 44/48 Bosch Rexroth AG 4WEH.../4WH... | RE 24751-B/06.09 Troubleshooting Fault table The valve is not susceptible to faults as long as the specified operating conditions are complied with, in particular the oil quality. Table 21: Fault table Fault Possible causes...
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Page 45: Technical Data
RE 24751-B/06.09 | 4WEH.../4WH... Bosch Rexroth AG 45/48 Troubleshooting | Technical data Technical data Following faults due to pollution, it is - in addition to the repair - essential to check the oil quality and improve it, if necessary, by suitable means such as flushing or the additional installation of filters.
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