In detail: nsh 50 do-it-yourself repair from a real master for the site my.housecope.com.
Recommendation: the operating time of NSH hydraulic pumps for operation without breakdowns should not exceed:
- 4000 hours on agricultural tractors.
- 3000 hours on industrial tractors.
- 1000 hours on other machines.
Remember: the system must be filled with hydraulic oil, not "waste".
More fluid mining forces to raise the engine speed, which reduces the engine life.
Operation at increased speed of the pump NSh leads to accelerated wear of the seals and working elements of the pump.
If the NSh pump is out of order, it is better to replace it completely. In case of repair, you will need seals and an NSh repair kit.
If the casing bursts or swells, the pump must be replaced.
The loss of productivity developed by a gear pump at certain pressures is especially influenced by an increase in the end clearances between gears 1 and 4 and support bushings 3 (Fig. 52). Leakage through the end clearances is approximately 3 times greater than through the radial clearances with an equal value of these clearances, since when the gears rotate, resistance to oil flow is created along the radial clearances between the projections of the teeth and the bore in the housing; in addition, the path of oil movement along the radial clearances from the discharge cavity to the suction cavity is much greater than along the end clearances. At the same time, the rotation of the gears promotes oil leakage through the end clearances in the direction of their rotation.
Thus, increased end clearances are the main reason for reduced pump performance and oil pressure.
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When disassembling the pump after long-term operation, wear of the housing 5 is usually found in the area of gears 1 and 4 over the entire surface of rollers 2 and 8 and support bushings 3. Pump flanges 9 and 10 are practically not subject to wear. The contacting ends of the gears and bearing bushings are especially worn out, on the surfaces of which annular scoring, waviness, etc. are formed.
Rice. 52. Gear pump
Overhaul of the pump associated with the restoration of the housing and replacement of gears, it is advisable to carry out only in well-organized repair facilities. However, even in this case, during repairs, they usually do not restore the worn inner surface of the housing, since the radial clearance on the side of the discharge hole after replacing worn gears and bearings is almost equal to the clearance of the new pump, and the clearance increased due to the pump on the side of the suction hole will not provide significantly affect the normal operation of the pump.
Repair of pump gears depends on the nature of their wear. Wear of the ends of the teeth is eliminated by grinding while observing the parallelism of the planes of the ends and their perpendicularity to the axis of the gear wheel within 0.015 mm. Gear wheels with a worn out tooth profile are replaced with new ones.
Usually gears are made of 45 steel or 40X steel, hardened by heating with high frequency currents. Newly manufactured or restored gears must meet the following technical conditions: face runout of gears - no more than 0.01 mm; non-parallelism of ends - no more than 0.015 mm; runout of the outer surface relative to the hole - 0.015-0.02 mm; taper and ovality along the outer surface - no more than 0.02 mm.
Gear shafts worn out in the bearing seats are replaced with new ones, less often they are restored. The rollers are made of steel 20X, cemented to a depth of 1.2 mm and hardened to a hardness of HRC 60-62. The necks of the rollers, which are the rolling surfaces of the needles, are carefully ground and roughened to Ra = 0.10 μm.
The backup rolls of the needle bearings are rebuilt or replaced with new ones. When restoring support bushings, their worn ends are ground to eliminate traces of wear. After grinding the ends, it is necessary to restore the grooves for the passage of oil between the teeth. The bore holes of the support bushings are ground to the diameter required for the installation of the closest standard needle bearing, taking into account the diameter of the journal of the remanufactured or replaced roller.
To ensure normal operation of the pump gears, the support sleeves are ground in pairs in one size, while the parallelism of the ends should be within 0.01 mm. The beating of the outer cylindrical surface of the bushing relative to the axis of its hole is allowed up to 0.01 mm, and the beating of the ends relative to the axis of the hole at the largest diameter should be no more than 0.01 mm. Compliance with these conditions guarantees the absence of pinching of the gears with small end clearances.
After restoration or replacement of gears and bearing bushings, their total width is determined. Taking this size into account, one of the ends of the body is ground so that the length of the bore in the body (size A, Fig. 52) is 0.06-0.08 mm larger than the overall width of the gear and two support sleeves. When grinding the body, the non-parallelism of its ends must be ensured within the range of 0.01-0.02 mm. The uniformity and size of the provided end clearance between the gears and the ends of the bushings is the main criterion for the quality of pump repair. In some cases, the required end clearance can be provided with foil spacers that are installed between the ends of the body and the flanges. However, this method of adjustment is not reliable enough and is recommended only in some cases before the next scheduled repair.
For normal operation of the pump, it is necessary that the end face of the collar of the sleeve 6 (see Fig. 52) over the entire surface adjoins the packing follower 7. When repairing the packing follower, grind it flat until traces of wear are removed. The end of the collar of the sleeve is also ground, maintaining the perpendicularity of the end to the axis of the hole of the sleeve; butt runout should not exceed 0.01 mm.
Before assembly, all parts of the pump to be repaired must be rinsed in kerosene and lubricated with a thin layer of mineral oil, and the needle bearings must be rinsed in gasoline and lubricated with grease. The planes of the body, covers and bushings must be free of nicks and scratches. The pump assembly must be carried out in such a way that the worn-out inner surface of the housing is on the side of the suction port, i.e. on the left, when viewed from the side of the drive shaft, and the drainage channels on the bushings are brought out in the same direction.
In order to avoid clamping and misalignment of shafts and gears, the screws for fastening the flanges must be tightened alternately and to failure, while the ease of rotation of the rollers is checked by hand.
The repaired pump is tested on a special bench to determine the capacity and volumetric efficiency (efficiency).
The volumetric efficiency is the ratio of the pump's performance at a certain pressure to its own productivity without pressure. It characterizes the quality of the pump repair. The more precisely and with smaller gaps the mating parts are made, the less internal leaks in the pump and the greater the value of the volumetric efficiency.
By pumps NSh.
Ukrainian Vinnitsa are very bad. Russian Yaroslavl are very bad.
Ukrainian Kirovograd are normal.
I installed NSh 150 on mine .. the pressure is 16MPa, the oil gets very hot in summer, I need an oil cooler, the working cycle with three operations has become more fun. Now I found a Czech analogue of NSh 100. the representative's contacts are below, they have 110 cubes, but so far in the drawings
Alexander Gladyshev
Chief Engineer
(343) 253-29-12, 270-62-88
Major malfunctions gear pump
Wear of the walls and bottom of the housing wells, the ends of the gears and the surfaces of the trunnions, the bushing holes for the trunnion, chipping of the edges of the pump cover collars for the sealing gland, wear of the cover plane.
Gear pump repair
The pump is disassembled and repaired if it has a volumetric K.P.D. less than 0.6 (after replacing the seals). To properly control this indicator, it is necessary to distinguish between the designations of hydraulic pumps. In the markings NSh-10D, NSh-32 and NSh-46U, the figure corresponds to the theoretical productivity of the new pump in cubic centimeters per revolution of the gears. Letters D, U after the number mean the pump model. The direction of rotation of the drive gear is shown on the pump plate with the letter L (left) or P (right, but most often not indicated)
Dimensions of the gear pump housing, mm. Table 1
* Dimensions for crimp rebuilt hulls
When disassembling the pumps, unscrew the bolts, remove the pump cover and remove the parts by hand. The puller is used only when removing the lower pair of bushings from the socket. The bushings of the cover and sealing ring of the NSh-32 and NSh-46 pumps are interchangeable, but if the pump is assembled again from these parts, then depersonalization of the bushings and gears is not allowed.
Pumps received for the first time for repair are repaired by displacing the gears with concentric bushings. This method allows you to repair the pump at a lower cost, since the restoration of the pump body is reduced to one operation - wasting the wells to an increased size (Table 1; Fig. 1). the pump is assembled with eccentric bushings, the displacement of the gear axis should be equal to half the difference in the sizes of the gear tooth heads and the housing wells.
Fig. 1. Hydraulic pump housing
With greater wear of the pump casing surfaces (second and third repairs), the casing is subjected to plastic deformation - hot compression.
Rice. 2. Device for crimping the pump casing: 1-repaired pump casing; 2-ejector; 3-matrix; 4-mold body; 5-poison; 6-top plate.
For this, the body is placed in an electric heating furnace with automatic temperature control and held for 30 minutes. at 500 + 10 0 С. Then the body is installed in the matrix 3 (Fig. 2) of the device and compressed under a press. Compression of the body must be completed at a temperature not lower than 4300 C. The compressed body is subjected to heat treatment: heating and holding for 30 minutes. at 5200 C, quenching in water with a temperature of 60-1000 C and tempering (aging) for 4-6 hours at 170-1800 C. The crimped body is bored on a 1L62B lathe or on 6M82 and 6M12P milling machines using a device (Fig. 3).
Rice. 3. Device for boring gear pump casings: a - jig for pinless installation of the casing; b - a device for boring; in-mandrel; 1-device body; 2-pin; 3-axis housing; 4-conductor body; 5-movable cone; 6-clamp; 7-cutter mandrel; 8-clamping screw; 9-cutter; 10-pin; 11-cutter.
The ellipticity of bored wells should be no more than 0.01 mm, the taper - no more than 0.02 mm, the non-parallelism of the axes of the wells - no more than 0.03 mm, and the misalignment of the planes of the bottom of the housing wells - no more than 0.02 mm. The depth of the wells is controlled by an indicator.
To restore the pump gears, the worn surfaces of the journals, ends and surfaces of the gear teeth heads are ground to repair dimensions on a 3B12 cylindrical grinding machine. The grinding wheel of the PP-300x40x127-Ek brand is filled for grinding the ends of the gears, as shown in Figure 4. The radius of curvature of the edges of the teeth should be 0.01 mm.
Rice. 4. Grinding of the ends of the gears: a - the position of the edge of the wheel during grinding; b-grinding of the end face; in-dressing the grinding wheel.
The runout of the ends of the gear teeth relative to the center line is allowed no more than 0.01 mm. The grinding wheel should be straightened after machining with 20-30 gears, the dimensions of the gears after grinding are shown in table 2.
Dimensions of gear pump gears after grinding. table 2
Outer diameter of the gear tooth head, mm
The depth of the carburized layer of the gear after processing must be at least 0.8 mm (hardness HRC 58-62).
Depending on the length of the tooth, the repaired gears of each repair size are sorted into groups with an interval of 0.005 mm using a lever bracket.
Pump bushings are repaired by plastic deformation by compression (Fig. 5) in a cold state.
Rice. 5. Device for crimping bushings: a-device for crimping bushings; b-sleeve; 1-rod (working tool); 2-poison; 3-sleeve; 4-matrix; 5-insert; 6-ejector; 7-matrix body.
The dimensions of the sleeve blank after swaging are shown in Table 3.
Dimensions of the sleeve blank after swaging Table 3
At the crimped sleeve, end face B is machined, an oil groove to a diameter d1 (Fig. 6), a hole for a trunnion is expanded or bored to a size d.
When machining, an eccentric collet chuck is used (Fig. 7), which allows processing bushings with an eccentric.
Rice. 7. Eccentric collet chuck: 1-collet; 2-sleeve retainer; 3-adjusting bolt; 4-cartridge case; 5-clamping screws.
To process the end planes B and C (see Fig. 6), two cutters are installed on the support using a special head (Fig. 8) so that the length of the sleeve after processing corresponds to the data in Table 4.
Rice. 8. Dimensions of the sleeve after machining (see Fig. 6), mm Table 4
* Dimensions for compression remanufactured pump casings.
The height of the bushings, processed simultaneously with two cutters, usually differs by no more than 0.005mm, and the bushings correspond to the same group. The butt planes of the bushings are milled on a milling machine using a device (Fig. 9)
Fig. 9. Milling of the butt plane of bushings: 1-bushings; 2-cutter.
Irregularities in the mating surface of the cover 1 (Fig. 10) of the pump are eliminated by milling this surface until wear marks are removed. If at the cover the collar holding the gland retaining ring is broken off, then a groove is made in place of the collar and a steel ring 2 is installed in the cover, attached with screws 3.
Rice. 10. Restoration of the retaining collar of the pump casing cover: 1-cover; 2-ring; 3-screw.
Bushings and gears, are mating parts, are selected according to size groups so that the length of each pair of lower bushings, gears and upper bushings differs by no more than 0.005 mm. The bushings installed in the housing should not protrude more than 0.005mm relative to each other. The rubber sealing rings and the cuff, which have lost their original elasticity, are replaced. The selected gears and bushings are lubricated with diesel oil before assembling the pump. When assembling the left rotation, the body is installed in a fixture or a vice with copper jaws so that the inlet is directed towards the worker. The matched pair (left and right) of the lower sleeves is inserted into the wells of the pump casing. The drive gear is installed in the right well, and the driven gear is installed in the left. When assembling a pump of right rotation, the drive gear is installed in the left well, and the driven gear is installed in the right. The stuffing box is lubricated with a thin layer of graphite grease or grease and pressed into the cover using a mandrel. The lip of the oil seal must face the inside of the cover. The assembled pump is run in and tested on the KI-4200 or KI-4815 stand (Fig. 11)
Rice. 11. Testing the gear pump: a-installation of the pump on the KI-4200 stand; b-diagram of the pump connection to the hydraulic system; 1-fitting for connecting hydraulic units; 2-discharge hose; 3-test pump; 4-hose to the suction cavity of the pump; 5-pump mounting bracket; 6-consumable tank; 7-filter; 8-liquid flow meter; 9-radiator of the cooling system; 10- centrifugal filter; 11-overflow spool; 12-toggle switch of the revolution counter; 13-revolution counter; 14-high pressure gauge; 15-block of low pressure with a pressure gauge; 16-throttle; 17-way valve.
Run-in mode: without pressure - 4 min., At a pressure of 2.0 MPa - 7 min., At 4.0 MPa - 5 min., At 7.0 MPa - 4 min., At 10.0 MPa - 12 min., And at 13.5 MPa - five cycles 0.5 min. The pressure in the discharge line is controlled by a throttle.
The pumps are tested for performance at a pressure of 10 MPa and an oil temperature of 45-550C. The test results must correspond to the indicators given in table 5.
Indicators of the repaired gear pumps. Table 5
Spare parts production:
Gear pump repair
The repaired gear pumps of the NSh type have a warranty period of 6 months.
When repairing in accordance with technical requirements, troubleshooting of parts and interfaces is carried out, 100% regrinding and assembling of gears, replacement of rubber goods, if necessary, manufacturing of housings, bushings, cages - clamping and bearing.
The pumps are tested at the KI 4815 stand for pressure and efficiency of at least 90%.
In 2015, 2,505 hydraulic pumps were repaired.
There is an exchange fund at the plant, which allows our customers to hand over gear pumps for overhaul and on the same day to receive circulating units from the warehouse.
Each MTZ-80 and MTZ-82 tractor includes a high-pressure gear pump. It is part of the standard equipment. Other types of agricultural, road, construction, working urban equipment cannot do without a pump. The key role of the NSh gear pump is to pump fluid in the hydraulic system.
Depending on its purpose, the gear pump has various features and parameters. For example, NSh-10 is used on tractors with excavator attachments. His actions should take place in a horizontal plane. Such an NSh pump as NSh-32 is suitable for equipment with attachments, which work in a vertical plane. It can also be bulldozers, blades, graders, bucket sheds. This type of equipment is required to drive the grapples and booms.
The device of all NShs is similar to each other and has a single principle of operation. Discrepancies may exist in structural elements and types of equipment, which are included in the package. In turn, a gear pump is a unit that transfers fluid in the hydraulic system. Due to rotation, the male and female rotors concentrate the vacuum from the inlet side, as a result of which the voids and grooves are filled with liquid as a result of the resulting pressure.
If we consider the device of the unit, then it does not seem complicated. But during operation, difficulties may arise if the minder does not have sufficient knowledge about the intricacies of choosing a pump, depending on the equipment that is being operated.
In conditions of increased hydraulic load, circular pumps are used. There are also flat ones. The price and performance characteristics of the former are significantly higher than the latter.
The type of connection to the drive depends on the shaft design. This is another important factor. In turn, the design can be syringe or keyway.
There are several main reasons due to which malfunctions of the Nsh gear pump occur.
Pump life-wise wear, drive damage, or leakage may occur. If this happens, insufficient or no oil is supplied to the hydraulic system.
If foam appears in the hydraulic tank or air is injected in the hydraulic system, check the tightness of the pipeline, the level of wear of the drive cuff and do not forget about the oil temperature.
If vibration and hum is observed during the operation of the pump, then a possible reason may be vibration of the shut-off valves, wear of the drive coupling, or insufficiently reliable fixation of the pipeline, as well as other system assemblies.
If there is no required pressure during the operation of the unit, you need to pay attention to the level of general wear of the pump, check the position of the valve adjustment and do not forget to evaluate the cleanliness of the spool.
At periodic overheating of the pump, filter clogging may occur, or excessive load during operation is observed. You should also check the oil level in the hydraulic tank, which may be low.
In order for the effective operation of the NSh pump to take place, it is imperative to adhere to a limited time. So, for example, for construction and industrial equipment, the operation should not exceed 3000 hours, for urban equipment - 1000 hours. For agricultural machinery, this period is 4000 hours. To reduce the likelihood of maintenance and the possibility of equipment downtime, the filter should be changed every time the pump is replaced. It is also worth using only original parts, otherwise the working unit will certainly wear out faster.
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If anyone installed the pump NSH-50 ON MTZ-80, tell us how its drive worked. Nothing turned out? There is a desire to put NSH-50 on the excavator MTZ loader, to speed up its work. There is nothing problem, I will increase the diameter of labor and replace the hoses with dtovsky. The question will stand, will not stand
I will share my experience in replacing nsh 32 by 50. I don’t remember exactly for a long time, but it seems that the oil supply pipes in nsh 50 thicker have to be replaced. And I didn't seem to notice the difference, but there was a new one. Then, after a while, the distributor was replaced with repair, the same hydraulics not in an arc. And then they changed the kit and installed a new NSh 32 and a new distributor, that's when I felt the power of the hydraulics. But this is just my case, see for yourself. The conclusion is that a lot depends on the distributor. you can throw 50 and it was in the distributor
If anyone installed the pump NSH-50 ON MTZ-80, tell us how its drive worked. Nothing turned out? There is a desire to put NSH-50 on the excavator MTZ loader, to speed up its work. There is nothing problem, I will increase the diameter of labor and replace the hoses with dtovsky. The question will stand, will not stand
I also want to solve this problem, I am preparing fittings and other bells and whistles, I want to put the distributor MP-80
set it to work normally the turn of the boom became quicker to work it is necessary to return a return flow from p 80 higher oil does not have time to leave tears the aluminum cover or presses the gasket the created pressure for all pumps is the same as for nsh10 that for nsh 100 the difference is how much oil it pumps per minute
I will share my experience in replacing nsh 32 by 50. I don’t remember exactly for a long time, but it seems that the oil supply pipes in nsh 50 thicker have to be replaced. And I didn't seem to notice the difference, but there was a new one. Then, after a while, the distributor was replaced with repair, the same hydraulics not in an arc. And then they changed the kit and installed a new NSh 32 and a new distributor, that's when I felt the power of the hydraulics. But this is just my case, see for yourself. The conclusion is that a lot depends on the distributor. you can throw 50 and it was in the distributor
I tried to install both the new R-80 distributor and the new NSh-32 pump works a little better, but very slowly, the entire R-80 is in oil. Today I loaded sand into Kamaz, so at a temperature of 29 degrees it generally mumbles if the bucket of the front loader scooped up a little more and does not lift it, I had to fill it up. So, you still need to switch to NSh-50. By the way, I talked with the driver of Tereks, there are two pumps 2 * 80 l / min = 160 l / min. So consider yourself the ratio 160/32 = is more than five times and naturally all working bodies work 3 times faster, that's for sure. Why no one wants to share their experience or no one from the forum did it. I bought a backhoe loader with 4 years of operation, and when I was looking for and talking with sellers, then everyone sells for this very reason, that there is no productivity at all!
On the current tractors for the drive of the hydraulic systems, there will be installed a Pump NSh 32.
Mechanism is a type of right wrapping, the viconu function of pumping up a working age.
Detail of the hydraulic system and serve as a guide. The managers of the well-thought-out design of the pump NSH 32 will be very lame in the region.
The report on the attachment of the given to the mechanism is easy to understand. NSH pump MTZ includes steps:
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Body, ring, cuff; Support plate, print and bearing clips; Gaskets and gaskets; Plates and inserts (livi, right); Leads and wire gears; Bolti, washers, krishki; Bushings and support rings.
Gears (leading and leading) in NSh MTZ vikonuyut pumping oil.
Dani elements of rosetting between clips (print and bearing) and plates. The pidshipnikov holder is a single support for the trunnions both at home and in the wire gears.
A detail from a small zusilla is stepwise pressed up to the teeth of the gears. With this rank, the optimal clearance between the hollow surface of the clips and teeth is ensured.
So also go to see an insignificant zusill Pump NSh 32 change the position of the plates. The elements are pidnimayutsya up to the gears, with the whole surface of the ground in the zone of a high vice.
NSh pump MTZ includes a wire gear in its budget.
The surface of the part is captured by two cuffs. The bushing of the vison is centered on the shaft, the gum ring is in the middle of the rose body with the creek.
Vikonuvati will replace, the installation of the pump is more beautiful in special workshops. Itself here you can not only fix the part correctly, but also reconsider the tightness of the spare part on the occasional stands.
Let's talk about the most common injustices of the NSh MTZ.
Call us to try to avoid the problem in robot parts when it’s going through, either through the deflection, or through the sticks.
In general, it is necessary to use an MTZ pump with a flow rate of at least 0.7.
A normal pump robot can also be updated for additional replacement of humic gaps. Might help and installing new cuffs. Below is a table, in which the most basic inequities of the tractor NSh and the methods of usunification are induced.
In case of any faults in the NSh MTZ, replace it with a new element (you can replace the necessary part in our catalog). In the main, the breakdown of a tractor spare part is tied to the parameters of the robot and the details according to the norms.
In order to replace Pump NSh 32 for a new part, it is necessary to replace the dismantling of the part:
Know the neatly trimmed cushions of the pedals of the muff of the clutch, galm, the knob from the vaulted gearbox. From the pedal of the keruvannya by feeding the fire to the single thrust. Dismantle from the steering control panel, and more precisely the Sp_dnichny part of the spare part. Polik cabins are also familiar. Discharge pipe and branch pipe can be dismantled.
Tilki pislya vikonannya danih diy recommended to take NSh pump MTZ ... When installing the gear pump, check the tightness of all oil lines. Remember that the flap washers stand on both sides of the oil line.
Pump NSh 32 - a small element of the hydraulic system of a driving tractor. Unimportant to the cost of storage with virobniztvі mіtsіnіh materіalіv and remaining technologies, the detail is free of charge. It is therefore recommended to periodically repair the pump and replace it. You can get the new NSh MTZ on our website.
The bushing will instantly secure the end collar of the gears.
The valve is vitrati and vise in such a way.
Working the line from the pump before moving in a grip to the vertical channel A and distance along the horizontal channel V ... through the central opening 3 in the nozzle 2 to the steering linkage.So yak shvidk_st in the central opening of the zhikler 2 vishche, below in the canal V through the gap of passing grips, a vice in the empty D ... with a central opening, if it is lower, lower in the canal V ... і, also, chim at the vertical channel A horizontal channel E ... The difference in frequency and the wrap of the pump gears is the difference in the grip in the empty D i in channels A i E growth і when the pump feeds downward 31-35 l / h, the plunger 8 is moved to the right, squeezing the spring 5. At the same time, the drop of the working unit is partly from the vertical channel A by pipe 12 (div. fig.
With an increase in the grip in the channels A i V and empty D (div. Fig. 3) up to 9810-10790 kPa the bag 9 bends towards the socket, clutching the spring 10. Working from the empty D through the throttle channel of the plug 6, through the radial opening 11 in the plunger through the pipes, go to the spill. So, as the passages of the throttling canals 4 and 7 do not change significantly, the grip is empty D practically not to move. Adding a vice in the canals A wicking the plunger 8 to the right, as a result of the work of the line from channel A, along the pipes, move along the pipes to the wet pump nozzle. In such a rank, the system of hydrodynamic kerm is protected from being re-entangled.
Removing the pump from the car.
To know the pump, visit the following:
- open the lock nut 8 (div. Fig. 2) and open the regulating screw, loosening the tension of the belts;
- screw the fastening bolts of the unstable bracket to the dvigun, mark the pump with the tensioning attachments, having previously attached the belts.
- close the pump for the non-rugged bracket 10 in the bream;
- see the pipe 12 to the oil drain from the vitrati valve body and vice;
- check the vitratic valve and the vice and the wet pipe 7 from the pump;
- put a mark of the position of the pulley 15 on the pump casing;
Insert the nuts and open the pump out of the collapsible bracket 6, meaning the position of the splines of the pump shaft before the label was applied to the pump casing;
- screw the locking ring 4 and press the mother tongue 1 with the shim 15 with the bearings 3;
- fit the retaining ring 2, and then the bearings from the collapsible bracket;
- insert the plug 12 (div. Fig. 3), tighten the plunger 8 and the spring 5 from the body (before the spring 5, the plunger is guilty of going out of the body);
- fasten the plunger 8 behind the non-working surface (the fastening is not permissible by the size of the diameter), insert the plug 6 and tighten the bag 9 and the spring 10 with the guide. It is necessary to reconsider the mill of parts for the selection process. The end surfaces of the bushings and the pump gears, the working surface of the plunger 8 is not guilty of the mother of worn seizures, but the cuff 5 (div. Fig. 1), the oil seal W and the gaskets are lined. Slides on the pump shaft and in the hub can wear no more than 4.0 mm. It is not allowed to push the lines of the shkiv, the troughs on the brackets of the tensioner.
Folding and regulation of the pump.
Carry out the pump assembly in an offensive order:
- close the plunger 8 (div. Fig. 3) and place the spring 10 with the guide, the bag 9, the plug 6 with the regulating shims 1;
- adjust the grip of the bag opening in the special attachment with the adjusting gaskets.
- place the plunger with the spring 5 on the plate and light the plug 12;
- insert the bearings Z (div. Fig. 2) into the loose bracket 6 and fasten it with a retaining ring;
- press the mother tongue 1 with a screw into the bearings and insert the locking ring 4;
- pour 50 cm 3 of oil into the ruffled bracket 6 so that the oil has filled up the empty mother;
- switch on the pump (after pushing the mice, applied during picking up) to the loose bracket, placing the gasket in front of the front;
- install a vitrati valve and a vice and connect the pipe 7 to the pump until the pump is wet, connect the pipe 12 to the oil.
Installing the pump on the car.
- put the belts on the drive gear of the motor and pump and fasten the non-rugged bracket 10 on the motor;
- with the help of the adjusting gwent 9, adjust the tension of the belts.
With the correct tension, the sagging in the middle part of the belt under the Zusillas 39 N is guilty of buty in the intervals of 10-15 mm.
When adjusting, tighten the lock nut 8 and connect the hoses.
In the given statistics, the main faults of the hydraulic systems and tractors MTZ, YuMZ, T-150, T-40, T-25, T-16 and K-700 are clear. On the day, there are signs of inequities in the hydraulic system, there are the same signs of the cause.
In the hydraulic tractor system, the most often find such inequities: it’s not necessary to go down or to go down; Do not turn automatically from the working position to the position Neutral, oil spills into the tank and swirls through the filler neck, the oil overheats when the hydraulic system is robotic, and does not fit into the transport position.
Knowing (attaching) the tractor does not come down or fall as a result of a defect and also due to the lack of oil in the hydraulic tank, low oil temperature, a crossover of a loose valve in the complete coupling of the hoses, a self-locking reversible valve , P75, MP-80, P100).
When the oil in the hydraulic tank is at a low level, it is necessary to add it to the control level, and the oil should warm up to a temperature of 300-320 K.
For usunennya hangup of the bypass valve of the hydrodynamic unit (rozpodilnik), it is necessary to supply and install this part in a gas or in a diesel burner. The zapob_zhny valve, the valve of the hydraulic distributor, is also required for a vise of 13-16 MPa (depending on the type and brand of the hydraulic valve, in some cases, it is required for a vise of 20 MPa).
If there is a leakage of the collar of the hoses, it is necessary to pull the nut of the pull-out coupling to the end, if it did not help, then it is necessary to replace the resulting coupling.
The mimicry of the crossover of the hydraulic valve of the power cylinder of the CS is assimilated by the installation of the valve of the valve (hydraulic valve) in the position of the primus lowering with the further mixing of the lowering operation, preventing the end of the lowering operation.
More often than not, there is a lot of pressure in the hydraulic cylinder, driven by the flow of oil in the hydraulic pump. If it is evident that the pressure is applied to the hydraulic system, it is necessary to tighten the weakened fasteners, reconverting the hoses (sleeves of a high vice - RVD). If a change of oil in the pump is found, it is necessary to repair the pump or replace it with a new hydraulic pump. As a rule, pumps and NSh (gear pumps and fixed gears) are installed on tractors of a vyrobniztva. In the Internet-shop Spetstechnomarket, you can buy a new NSH or a repair NSH. Also, oil overflow can be found in the hydraulic cylinder itself, in such a case it is necessary to change the hydraulic cylinder and look at it. If the hydraulic cylinder stock and the hydraulic cylinder liner do not have any mechanical parts (eg, podryapin), then you can get by with a replacement repair kit (GTV). In general, it is necessary to repair the hydraulic cylinder of the tractor in order to replace the hydraulic cylinder.
Rosewood handle; do not turn automatically from the working position to the position Neutral due to cold oil, damaged regulation of the grip of the extra valve of the hydraulic valve spool, the change of the cyclonic filter of the hydraulic spool.
In such a drop, the oil is colder and warms up to a temperature of 300-320 K, and the grip of the shut-off valve is adjusted by 13-16 MPa and the crimp valve by 11-12.5 MPa.
If the disparity is not weighed down, then it is necessary to remove the spool, look at it for mechanical problems, if it’s wear and tear, if it’s not possible to put it in a gas or a diesel burner, to clean it out, take it back. Also, there are hydraulic valve valves, there are drops of hydraulic valve and valve in case of hitting a brude, shuffling. іnshikh particles pіd valve or valve spool. It is therefore recommended to conduct a survey of the components in the hydraulic system for a
March 27, 2014 Due to the fact that we were busy unloading the fertilizer, we had to deal with small things, and it was not possible to roll the half-frames and insert the engine. In the process, the NSh-50 oil pump was replaced with the tractor's hydraulic system.
You didn't change the big bushing on the half-frame, that's where it's fun. I don't know how on the T-150, but it's very fun to do it on Kirovts))).
you have a lathe on the old base, grind mandrels for bushings and hammer with a sledgehammer without problems
well, you are Seryoga and a lazy person. I didn't unscrew the gimbal from the box, but how will you hit the forks when rolling? the punching box from the cardan side, and the bolts of the locking plates are M12. I myself changed the support and bushings with fingers in the spring, I went out into the field for a week ..
To hammer in the high bushings, you don't need a lot (and you don't need a jack), I carved a punch and hollow with a sledgehammer until it turns blue. swing from the shoulder and plant heartily. Now about the pump. It is better to remove it together with the case, unscrew it from the gearbox (three M12 bolts) and put it easier together with the case, and you do not need to grind anything and spoil the tool. You just have to turn off the pump shut-off lever from the transfer case remove, and then put in place +1 minute of time. And if you change the pump to the steering one, there is no lever, then even faster. As for the cardan, if it turned out to roll without unscrewing, well done, but do not forget the cardan from the box and the cardan from the pig to the rear axle must be in alignment, otherwise vibration will go and the nodes will gradually break (crosses, bearings 310 in the pig, etc.)
Hi, there is an idea to make a car wash out of such a pump by connecting it to a 1.5kv 1500 rpm electric engine, what do you think is real and will it work?
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Obviously the pump is not Hydrosila! ))) But the one that was removed - Hydrosila, old model (UNIVERSAL). I wonder how much did you work? Now Hydrosila has removed them from production, and instead of UNIVERSALs, they began to produce MASTER with an increased TWICE. resource and improved design
