RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 3/36 Contents Inhalt 1 About this document ..................5 1.1 Related documents ...................5 1.2 Abbreviations used ...................5 1.3 Signs and symbols used ................6 2 General safety instructions................7 2.1 Intended use .....................7 2.2 Improper use .....................7 2.3 Personnel qualifications ................8...
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4/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09...
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 5/36 About this document About this document This instruction contains important information on the safe and appropriate assembly, transport, commissioning, maintenance, disassembly and simple troubleshooting of the internal gear pump PGH.-3X. Read this instruction completely, especially chapter 2 “General safety instructions”...
6/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 About this document Signs and symbols used In this instruction, the following signs and symbols are used: Activity symbol: The text following this symbol describes activities that may be performed in any order.
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 7/36 General safety instructions General safety instructions The internal gear pump PGH.-3X was manufactured according to the generally accepted rules of technology. There is, however, still a risk of personal injury or damage to equipment if the following general safety instructions and the warnings before the steps contained in these instructions are not complied with.
General instructions • Observe the locally regulations for accident prevention and environmental protection. • Exclusively use products of Bosch Rexroth AG in good technical order and condition. • Check the product for visible defects, for example transport damages, damaged or missing cover caps and/or shaft protection.
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RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 9/36 General safety instructions During assembly • Make sure the relevant system component is not under pressure or voltage before assembling the pump. Protect the system component against being switched on. In doing so, observe the operating instruction and other technical documentation of the system.
PGH.-3X | RE 10227-B/07.09 General safety instructions Operator's obligations The operator of the Bosch Rexroth AG products is bound to provide for personnel training on a regular basis regarding the following subjects: • Observation and use of the operating instruction and the legal regulations •...
12/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Product description Product description For more detailed information on the operating conditions, port dimensions and performance limits refer to data sheet RE 10227. Device description Fig. 2: Set-up of the internal gear pump Hydraulic pumps of type PGH.-3X are gap-compensated internal gear pumps with...
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 13/36 Product description Identification of the internal gear pump The internal gear pump can be identified by means of its nameplate. The following example shows the nameplate of an internal gear pump PGH-3X:...
14/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Transport and storage Transport and storage Transporting the internal gear pump CAuTION! Danger of health hazards! When lifting pumps of frame sizes 4 and 5, there is the risk of health hazards due to their high weight.
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RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 15/36 Transport and storage Transport with eyebolt You may hang the internal gear pump up at the eyebolt. Before the transport, check the tight seat of the ring bolt. Lift the internal gear pump as shown in fig. 4 using the screwed-in ring bolt without any risk of damage.
16/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Transport and storage Fig. 5: Mounting using a belt Storing the internal gear pump Note that the warranty period is not extended by any storage! Requirement • The storage rooms must be free of etching substances and gases.
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 17/36 Assembly Assembly You may only start with the assembling if the hydraulic scheme of the system is readily available. unpacking CAuTION! Danger of parts that are falling down! In case of improper opening of the packaging, the internal gear pump may fall out and cause injuries or damage.
18/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Assembly Assembling the internal gear pump CAuTION! Risk of damage to persons and property! Assembly of the internal gear pump requires basic mechanical and hydraulic knowledge. The assembly of the internal gear pump may only be performed by qualified personnel (see “Personnel qualifications”...
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RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 19/36 Assembly Fig. 7: View housing with marking pressure and suction port Marking suction port “S” Marking pressure connection “P” Fig. 8: Assembly internal gear pump PGH.-3X Arrow indicating the direction of rotation on the housing...
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20/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Assembly For assembling the internal gear pump, the following work steps are required: Make sure that the direction of rotation of the internal gear pump according to the arrow indicating the direction of rotation on the housing complies with the direction of rotation of the electric motor.
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 21/36 Commissioning Commissioning For commissioning the internal gear pump PGH.-3X, the operating instruction of the hydraulic system must necessarily be observed. DANGER! Risk of damage to persons and property! Assembly of the internal gear pump requires basic mechanical and hydraulic knowledge.
22/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Commissioning First commissioning Fig. 9: Bleed and measurement port internal gear pump Bleed port internal gear pump (M) Proceed as follows to commission the internal gear pump PGH.-3X: DANGER! Slip hazard! Slipping may cause serious injuries. When removing shaft protection, protective plugs and flange covers, residual oil may leak at zero pressure.
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 23/36 Commissioning Manual bleeding of the pump As standard, the bleed and measurement port of the internal gear pump is closed by means of G 1/4 screw plug. CAuTION! Risk of damage to persons and property!
The pump may only be operated in perfect condition. In order to provide for a long and reliable operation of the internal gear pump, Bosch Rexroth AG recommends to check the hydraulic system and the internal gear pump at regular intervals: •...
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 25/36 Maintenance and repair Maintenance and repair DANGER! Risk of damage to persons and property! Maintaining and repairing the internal gear pump requires basic mechanical and hydraulic knowledge. Only qualified personnel (see “Personnel qualifications in chapter 2) is authorized to perform the maintenance and the repair of the internal gear pump.
As preventative maintenance of the pump, we recommend to exchange the shaft sealing ring after an operating time of maximally 5 years by an approved Bosch Rexroth service operation. For more information on the maintenance please refer to the system's operating...
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 27/36 Decommissioning Spare parts Repairs at the internal gear pump PGH.-3X may only be performed by the manufacturer or their authorized dealers and branches. No warranty is accepted for independently performed repair works. Authorized dealers and branches are available for performing repairs at their facilities.
28/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Disassembly and replacement Disassembly and replacement 11.1 Required tools Disassembly of the internal gear pump PGH.-3X can be performed using standard tools. You need: • A set of Allen wrenches for the housing screws.
Extension and conversion Pump combinations Internal gear pumps can be combined into multiple pumps using original Bosch Rexroth combination parts. In doing so, the system's operating instruction must be considered. For information regarding the assembling of the combination parts, please refer to the installation instruction of the respective combination part.
30/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Troubleshooting Troubleshooting 14.1 How to proceed for troubleshooting Always act systematically and targeted, even under pressure of time. Random and imprudent disassembly and readjustment of settings might result in the inability to restore the original error cause.
RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 31/36 Troubleshooting 14.2 Malfunction table Table 4: Malfunction table internal gear pump PGH.-3X Malfunction Possible cause Remedy Pump does not deliver / suck The pump is not bled Bleed the pump O-rings defective (wrong medium, damage to...
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32/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Troubleshooting Malfunction Possible cause Remedy Volumetric or mechanical efficiency is not See malfunction “Viscosity >300 mm2/s” achieved See malfunction “Viscosity <10 mm2/s” See malfunction “Output flow is not achieved” Operation projected with too low and/or too...
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RE 10227-B/07.09 | PGH.-3X Bosch Rexroth AG 33/36 Troubleshooting Malfunction Possible cause Remedy Permanent output pressure >315bar Line cross-section too little Observe the information on the design of the lines in hydraulic trainer, volume 3 and Flow resistances too high...
34/36 Bosch Rexroth AG PGH.-3X | RE 10227-B/07.09 Technical data Technical data For details about the technical data of your internal gear pump PGH.-3X, please refer to the technical data sheet “Internal gear pump, fixed displacement” RE 10227. For the rated pressure of the internal gear pump, please refer to the information on the nameplate, see chapter 4.2 “Identification of the internal gear pump”.
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