1. Cause of failure: the oil level of the hydraulic oil tank is too low;
Exclusion method: Add hydraulic oil.
2. Cause of failure: Hydraulic oil is not used according to the season;
Exclusion method: Usually suitable for 46# hydraulic oil (or 68#) without special replacement, consider using 32# when the north is cold in winter.
3. Cause of failure: The oil inlet pipe is seriously blocked by dirt;
Exclusion method: Remove the foreign body in the tube.
4. Cause of failure: the oil seal of the driving gear of the oil pump is damaged, and the air enters the hydraulic system;
Exclusion method: Replace aged or damaged oil seals, O-rings.
5. Cause of failure: the "O" seal ring of the oil pump inlet and outlet joints or the elbow joint is damaged, the fastening bolts of the elbow joint or the nuts of the inlet and outlet pipes are not tightened, and the air enters the hydraulic system;
Exclusion method: Replace the O-ring seal, tighten the bolt or nut at the joint.
6. Cause of failure: internal leakage of oil pump and aging of sealing ring;
Exclusion method: Replace the seal.
7. Cause of failure: the end face of the oil pump or the end face of the main and driven gear sleeves is worn or scratched, and the unevenness of the end faces of the two shaft sleeves is out of tolerance;
Exclusion method: replace the worn gear oil pump or oil pump shaft sleeve, and grind the end face on the flat plate when the wear is slight. The allowable error of unevenness is 0.03mm, the end face of the upper shaft sleeve is lower than the pump body, and the upper plane (the normal value is lower than 2.5-2.6mm), if the deviation is out of tolerance, the lower shaft sleeve should be added 0.1-0.2mm copper sheet to compensate, and the rear axle sleeve should be installed when installed.
8. Cause of failure: internal leakage caused by incorrect assembly of internal parts of the oil pump;
Exclusion method: The unloading plate and sealing ring must be installed into the oil cavity to keep the two axle sleeves balanced. The elastic force of the guide wire should be able to twist the upper and lower shaft sleeves towards the rotation direction of the driven gear at a slight angle at the same time, so that the processing planes of the two shaft sleeves of the main and driven gears are closely fitted; The unloading groove on the shaft sleeve must be installed on one side of the low-pressure cavity to eliminate the harmful closed dead volume generated when the gear is meshed; Before pressing into the self-tightening oil seal, it should be coated with a layer of lubricating oil on its surface, and it should also be noted that the oil blocking edge is facing the front cover, and it cannot be reversed; Before installing the pump cover, a small amount of hydraulic oil must be poured into the pump casing and the meshing gear should be rotated by hand.
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Rexroth hydraulic pumps – use, repair and assembly of gear pumps
1. What should I pay attention to when using a gear pump?
(1) The oil suction height of the gear pump shall generally not be greater than 500mm.
(2) The gear pump should be directly connected with the motor through the flexible coupling, generally not rigidly connected or connected with the power source through the gear pair and belt mechanism, so as to avoid unilateral force, ...
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Causes and analysis of the failure of Rexroth vane pumps
1) Rexroth vane pumps: Some users do not fill the pump with enough water before starting; It appears that the water has spilled out of the vent, but the air is completely discharged without turning the pump shaft, so that a little air remains in the inlet pipe or pump body.
2) Rexroth vane pump contact inlet pipe horizontal section of the counter-water flow ...
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How do Rexroth piston pumps supply oil?
1. Straight shaft swash plate Rexroth piston pump is divided into two types: pressure oil supply type and self-priming oil supply type. Most of the pressure oil supply hydraulic pumps use oil tanks with air pressure, and there are also hydraulic pumps with oil replenishment sub-pumps to provide pressure oil to the oil inlet of the hydraulic pump. The self-priming hydraulic pump has a strong self-priming capacity ...
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How Rexroth hydraulic pumps are adjusted
How Rexroth hydraulic pumps are adjusted
1) Swash plate axial piston variable pump, used for open hydraulic rotation back
2) Mainly used in the field of mobile machinery
3) The pump works under the condition of self-priming, mailbox pressurization or with built-in suction pump, (centrifugal pump).
4 ...
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Rexroth Piston Pump FAQs
Rexroth piston pump failure manifests itself as follows.
The causes and elimination methods of excessive working noise of piston pumps.
There is air in the oil pump. This failure usually occurs when a new pump is installed. When opening a new pump, oil should be added to the pump first to lubricate the pump's bearings, plungers, and cylinders.
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Rexroth pressure reducing valve main types and technical parameters description
1. Pressure reducing and stabilizing valve
Main features: 1. Piston type with DN65 caliber or above. The life of the diaphragm is increased by more than 3 times; 2. Below DN50 caliber, the original diaphragm is replaced by a flat diaphragm of nylon reinforced rubber, which also improves the service life by more than 3 times. Applicable medium: water, air. Medium temperature ...
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Rexroth Hydraulic Pumps – Routine maintenance and troubleshooting of gear pumps
1. Daily maintenance
1) Strictly implement the post operation method and carefully fill in the operation records.
2) Check the bearing temperature and oil pressure regularly; Check the level height of the lubricating oil every shift.
3) Check whether there is leakage in the sealing part once per shift.
4) Do a good job in each shift ...
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Rexroth builds a new plant in Querétaro, Mexico
Bosch Rexroth, a leading global supplier of drive and control technology, is building a new plant in Querétaro, Mexico, and will further strengthen its presence in North America. Bosch Rexroth has been successfully operating in Mexico for 40 years. From the summer of 2023, the walking machines of Querétaro ...
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Bosch Rexroth presents the EMC-HP series, a new member of the electric axis family
● Robust and precise thanks to the Planetary Screw Assembly (PLSA).
● Digital engineering: freely configurable with a range of different options
● Compact design for easy integration
Robust, precise and efficient: EMC-HP stands for press-fitting, riveting, positioning and testing.
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Rexroth's automation toolkit ctrlX AUTOMATION technology helps the food packaging industry
Machine builder ILLIG makes the ever-changing food packaging industry more flexible and forward-looking with the openness of the Bosch Rexroth Automation Toolkit ctrlX AUTOMATION technology.
Debut at Interpack 2023: the modular ILLIG XLU complete series ...
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The principle and method of Rexroth hydraulic pump oil quantity adjustment
1. The principle of Rexroth hydraulic pump oil volume adjustment
Generally, in order to adapt to the specific requirements of the diesel engine under the load, the fuel injection pump must be able to adjust the maximum fuel supply to the zero oil supply range of the whole machine when the fuel supply is running.
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Rexroth supports Akcurate & CIMT from dental implant products to body parts
How can you transform a high-speed milling machine for dental products into a high-performance automatic machining system for the automotive industry? The Göttingen-based mechanical engineering company Akcurate & CIMT took up the challenge and solved it with a complete solution from Bosch Rexroth.
Dental implant ...
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Bosch Rexroth generated sales of 7 billion euros, a record for the company's history
Despite the challenging environment, Bosch Rexroth achieved double-digit sales growth in fiscal 2022;
Demand for new orders remained strong at 7.3 billion euros;
Record investments in R&D, innovation and production networks;
Through acquisitions and mergers ...
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Bosch Rexroth: a dual powerhouse in the field of copy cutting
For the field of profiling cutting, there is a growing demand to increase productivity and shorten set-up times and CNC interpolation time. The Bosch Rexroth MTX CNC system provides the perfect basis for machine builders and users to meet the growing challenges and at the same time comply with the requirements of the OPC UA standard for Industry 4.0 communication ...
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Features and working principle of Rexroth solenoid valves
First, the characteristics of the solenoid valve:
1) Rexroth solenoid valve, solenoid valve and all stainless steel; For highly corrosive media, the diaphragm type must be selected. Neutral medium, it is also advisable to choose copper alloy as the solenoid valve housing material, otherwise, there are often rust chips falling off in the valve housing, especially the action is infrequent ...
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Analysis of the fault phenomenon and causes of Rexroth hydraulic oil pump
1. Check the internal leakage of the boom cylinder. The easiest way to do this is to raise the boom and see if it has a noticeable free descent. If the drop is obvious, disassemble the cylinder for inspection, and replace the sealing ring if it is worn;
2. Check the control valve. First of all, clean the safety valve and check whether the valve core is grinding.
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Rexroth inverter fault handling and maintenance methods
Minor and heavy faults of Rexroth inverters:
1. Minor faults include: inverter over-temperature alarm, cabinet over-temperature alarm, cabinet door opening, unit bypass, etc. The system does not remember the fault of the light, only the fault indication, and the alarm will be automatically eliminated after the fault disappears. During the operation of the inverter, if ...
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Applicability of Rexroth solenoid valves
1. Characteristics of the medium
1) Different varieties of solenoid valves are selected for gas, liquid or mixed state;
2) The medium temperature is different for products of different specifications, otherwise the coil will burn off, the seal will age, and the life of the product will be seriously affected;
3) The viscosity of the medium, usually below 50cSt. If...
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Rexroth launches the new linear module SMS
● Five pre-configured sizes: 30-120 mm
● Optional compact motor accessories
● Order online and deliver in stock
The new linear axes are suitable for handling cost-sensitive small parts and can be used as an alternative to complex pneumatic solutions. (Image source: Bosch Rexroth Co., Ltd.)
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Rexroth Hydraulic Pump - Common maintenance knowledge of hydraulic piston pumps
1. Hydraulic pump:
Straight shaft swash plate piston pumps are divided into two types: pressure oil supply type and self-priming oil type. Most of the pressure oil supply hydraulic pumps use oil tanks with air pressure, and there are also hydraulic pumps with oil replenishment sub-pumps to provide pressure oil to the oil inlet of the hydraulic pump. The self-priming oil energy of the self-priming hydraulic pump ...
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