In detail: do-it-yourself repair of the prf 750 baler baler from a real master for the site my.housecope.com.
The reliability of the PRF baler largely depends on the quality of the spare parts. High-quality spare parts are the key to long-term and efficient operation of the baler! In this article, we will consider the device, the principle of operation and the components and parts used in this unit using the example of the PRF-180 round baler. There are also detailed diagrams of the baler assemblies with the designation of the necessary spare parts. You can order almost all spare parts for the round baler PRF-145, PRF-180 and PRF-750 on our website
The round baler PRF is designed for picking up hay, grass, as well as straw and subsequent pressing of raw materials into rolls with simultaneous winding with twine. The baler is designed for use in areas of lowland farming. The baler is aggregated with tractors of traction class 1.4-2.0 with PTO, hydraulic system, electrical equipment outputs. Depending on the configuration, the balers are produced in the following versions:
PRF-180 - round baler;
PRF-180A - round baler with automatic control system.
The PRF-180 baler is a modernized design of the PRF-750 round baler. A distinctive feature of the balers is the modified design of the pressing mechanism, the safety clutch of the pick-up mechanism and the main clutch, the tensioner of the pressing mechanism shut-off mechanism, the front, replacement of the support skis of the pick-up with support wheels, the use of the 10.00-16 Bel PT-5 tire in the running system.
The main components of the baler are:
lobovina PR-1.8 01.00.000 (item 1) (fig. 1),
pick-up PR 07.000 (item 2),
wheel travel chamber base PR15.00.000 (item 3),
bale chamber (item 4),
consisting of front and rear chambers, pressing mechanism PR 07.000 (item 8),
The baler works as follows: when moving forward in the unit with a tractor, the mass from the swath is picked up by the spring teeth of the baler PR 07.000 and is fed into the bale chamber, where the lower rollers and rolling pins of the pressing mechanism PR 26.00.000 twists into a roll. With the help of the clamping grid, the pressed mass is pre-compacted. When the preset compaction density in the bale being formed is reached, a signal is sent from the drum to the tractor driver to feed the twine into the baling chamber. Bale wrapping and twine trimming take place automatically when the machine is stopped. After wrapping the bale with twine, using hydraulic cylinders PR 22.00.000-03, the bale chamber opens and due to the rotation of the lower rollers, the bale is unloaded to the ground. After closing the bale chamber, the process is repeated.
Lobovina (Fig. 4.) is an integral part of the baler, inside of which there is a drive, consisting of a power receiving shaft PR 01.070 A (item 1), safety clutch PRP 05.00.020 (item 2), bevel gearbox KTF 03.000-01 (item 3), shaft with half couplings PR 01.110A (item 4), the drive shaft of the pressing mechanism, the drive shaft of the rollers PR01.01.000 (item 8). A traction loop (item 9) is welded to the front of the forehead for coupling with a tractor. A box for twine with a compartment for storing tools and a wrapping (knitting) apparatus PR 13.000 are also fixed on the forehead. The cam clutch (item 4) disables the drive of the pressing mechanism before opening the rear chamber by means of a cable traction (item 7) connected to the lever of the hydraulic cylinder. After closing the chamber, the coupling is returned to its original state by means of a spring (item 5).
Camera base PR 15.00.000 (Fig. 6) is a support for installing the bale chamber and wheel travel and consists of the following parts - axles with left and right cheeks, on which the front PR 05.140A and rear PR05.050A rollers. At the ends of the axle, pins and wheels are inserted and bolted. At the bottom of the base, next to the rollers, there are two casings PR05.00.340 and PR 05.00.350... On the casing PR 05.00.350 a belt is installed to close the gap between the rear roller and the bars of the pressing mechanism.
The baling chamber of the baler is used to form a bale and consists of the front PR 02.00.000 (Fig. 7) and the rear PR 03.00.000 chambers. An upper drum is installed on the front chamber PR 02.030A , having a mechanism for regulating the density of pressing and a drive shaft of the pressing mechanism. The rear chamber is pivotally connected to the front one, opens and closes with the help of hydraulic cylinders PR22.00.000-03mounted on levers and held closed by hooks PR 02.210A... At the moment of opening the rear chamber, the hydraulic cylinders turn the levers and open the hooks with rods. After the levers have reached the stops, the rear camera begins to rise. On the rear chamber there is a tension axle with driven sprockets of the pressing mechanism. The axle is spring-loaded and moves along the grooves when the pressing mechanism is released.
Pressing mechanisms on PRF-180 balers are installed of two types:
The pressing mechanism is designed to twist the pressed mass into a roll and is made in the form of a closed chain-slat conveyor. Roller supports are installed at the ends of the bar.
Wrapping machine PR 13.000 (Fig. 4D) is intended for wrapping the bale with twine and consists of a twine feed mechanism, carriage, leashes, stop, brake, knife and carriage drive mechanism. The carriage drive mechanism is connected to the pulley through a closed chain loop and gear train. The rotation of the pulley is carried out by twine, which from the bobbins, passing through the brake, bending around the pulley, through the feed mechanism enters the baling chamber, where, being captured by the roll, it is wound on it and moves the carriage. When the carriage moves, the twine is captured by the leash and moves along the roll from left to right (along the machine), when the extreme right position is reached, the twine is captured by a stationary leash, and the carriage, moving to the left until it stops, cuts the twine with a knife. The capture of the twine by the bale on the balers is carried out as follows:
on the PRF-180 - when the specified bale density is reached and a signal is given, the tractor driver, pulling the cord tied to the ring, rotates the feed mechanism rollers, thereby pulling the twine until it is captured by the bale;
on the PRF-180A - when the preset bale density is reached and the “DENSITY” light indication on the display panel installed in the tractor cab is switched on, the electric motor of the feeder drive is automatically switched on, thereby feeding the twine until it is captured by the bale. Manual control of the electric motor is possible, for which the toggle switch on the display panel must be set to the "MANUAL" position, and to start the electric motor, press the "Feed" button. After the twine is captured by the roll, the wrapping cycle is carried out automatically, and at the end of the twine, falling on the knife, is cut off.
The beltless round baler PR-F-750 is designed for picking up hay rolls of natural and sown grasses or straw, pressing the mass into cylindrical bales - rolls with subsequent twine wrapping. Type semitrailer. It is aggregated with tractors of classes 1.4 and 2. Serviced by a tractor driver. Recommended for use in areas of flat land use.
PR-F-750 in comparison with the PRP-1.6 baler has better performance indicators, 2 times less weight loss, especially of small fractions, due to this, the carotene content in hay increases. The bales formed with the help of the pick-up have a regular geometric shape with a low-density core, which allows them to be dried in the field or by active ventilation. Consumption of binding material is 1.8 times less compared to the basic machine. The use of the machine eliminates the need for zigzag movements when collecting a roll, requires a minimum number of adjustments, as a result, productivity is much higher, and labor costs are 24.2% less than when using PRP-1.6.
Technical and technological maintenance of the PR-F-750 baler is safer and more convenient than the PRP-1.6 baler.
The annual economic effect is 2163 rubles.
The baler consists of the following main parts:
cardan transmission, used to transfer torque from the tractor PTO to the gearbox;
a drum-type pick-up for swath pick-up;
bale chamber, consisting of front and rear (opening) parts;
beltless pressing conveyor for roll forming;
bale wrapper;
signaling about reaching the set compaction density;
wheel travel;
lighting equipment.
The cardan drive and the pick-up are unified with the PRP-1.6 machine.
Pick-up includes a rotor with five rakes, on which spring fingers are fixed for picking up the mass from the roll, the left shield, clamps attached to the brackets, and the right shield with a treadmill.
Bale chamber consists of a front part, on which an upper roller with a compaction density control mechanism is installed (Fig. 1), and a rear one.
The rear is pivotally connected to the front and lifted by hydraulic cylinders. At the rear of the pressure chamber, the tensioning device of the pressing conveyor is mounted. During operation, in order to prevent spontaneous opening, the rear part is fixed with latches, which are actuated by hydraulic cylinders.
Pressing conveyor designed to form a roll. Consists of two pulling chains with special links, which include cross-rolling pins. At both ends of the rolling pins, rollers are installed that move along the tracks of the baling chamber (Fig. 2).
Bale wrapper (Fig. 3.) is a cross beam, in which an endless contour of a chain is mounted that moves the carriage. The twine is fed into the bale chamber together with the mass picked up by the pick-up using a feeder consisting of two rollers. The guide bar grips the twine and, moving along the bale, wraps it around. The wrapping machine has four modes of operation with different winding pitches.
Signaling is a remote control, the signal to which comes from the density regulator. When the set density is reached, the signal for the end of pressing is given. The alarm works in both sound and light modes. Switching is done with a toggle switch on the remote control.
Wheel travel - welded structure in the form of a beam with semi-axles on which the wheels are installed, and two brackets with lower rollers.
Lighting equipment is a device mounted on special brackets, clearance and swing lights.
The baler leaves the factory packed in accordance with the shipping documents and must be assembled in accordance with the technical description.
When preparing the baler for operation, it is necessary to perform the following work: bring the tire pressure to normal; remove safety grease from assembly units and parts; adjust the tensioning devices of the pressing mechanism and the pick-up sign; tension sleeve roller chains; connect the propeller shaft joint to the end of the shaft, fasten the propeller shaft cover with bolts; fill with twine, for which place four bobbins in the box, tying the inner ends of the previous bobbins with the outer subsequent ones. Tie the cord supplied with the baler to the ring.
When preparing to operate the tractor, it is necessary to check the serviceability of the hydraulic system; connect to the side outlet of the tractor hydraulic system through the union (Fig. 4) a sleeve with a length of 2010 mm, to its end - the left breakaway coupling housing; set the distance of the PTO of the tractor to the axis of the trailing fork hole equal to 509 mm (dimension B), from the PTO to the cross member 200.220 mm (dimension B), from the cross member to the ground 430 mm (Fig. 5).
Using the linkage mechanism, raise the tractor's frame, fix the support in the upper position, lower the frame to its original position (dimension B).
When connecting the baler, back up the tractor so that the bottom of the machine is on the same axis with the tractor PTO shaft.
Connect the shackle of the lower part with the tractor's trailer fork, and the propeller shaft with the PTO shaft, fixing the hinge fork with a bolt. Secure the PTO shaft cover on the tractor linkage brace with the chain circlip.
Install the safety cable by throwing it over the crossbar of the tractor's hitch and fix it in the hole in the eyelet on the bottom bracket.
Connect the oil lines for opening the rear wall to the rear outlets of the tractor hydraulic system, the oil line for lifting the pick-up - to the sleeve from the side outlet.
Connect the cable plug (Fig. 6) to the tractor socket, the control panel plug - to the cable socket, 2 - control panel plug - to the socket for the portable lamp in the tractor, the control lamp on the control panel should light up. Check if the 2 - pin plug is connected correctly. To do this, set the alarm switch on the control panel to the “light” position. Press the density indicator button (Fig. 7) and watch the density indicator light on on the control panel. If the density indicator light does not turn on, you need to change the polarity of the 2 - pin plug connection. Fix the control panel in the tractor cab. After work, disconnect the 2 - pin plug of the remote control from the socket.
Release the left wheel by turning the handle forward (to position B) (fig. 8).
After connecting the baler to the tractor, the unit is adjusted (adjusting indicators are given in Appendix 1). This requires:
install the unit on a level surface;
adjust the safety clutch of the drive, pick-up and drive of the pressing mechanism, do not allow the springs to compress until the coils touch;
use the stop to set the distance from the ends of the spring teeth of the pick-up to the surface of a flat area, with the horizontal position of the bottom it should be 10.20 mm, moving the stop, the distance can be increased if necessary;
depending on the mass to be pressed, adjust the density indicator by compressing the spring;
adjust the step of wrapping the bale, which depends on the diameter of the pulley, with the largest diameter, the wrapping step is minimal, with the smallest - the maximum;
set the extreme position of the twine wrapping on the roll by rearranging the limiters;
adjust the parking brake drive mechanism;
carry out maintenance before running in;
run in under load;
closely monitor the condition of all fasteners, movable and fixed joints, welds, oil leaks in the hydraulic system.
When the machine moves over the roll, the spring fingers of the pick-up pick up the mass and feed it into the bale chamber, in which the mass is brought into rotation by means of the rollers and the pressing mechanism (Fig. 9). As the mass arrives, its compaction occurs, as a result of which the peripheral layers are denser than the core.
As the mass arrives further, its density in the chamber increases, the signal is transmitted through the upper drum to the alarm device, which turns on when the specified density is reached.
When feeding the crop into the bale chamber, the upper roller prevents clogging of the inlet opening. After activating the alarm, the tractor driver activates the wrapping machine.
The bale is wrapped with twine when the machine is stopped.
The bales should be wrapped with synthetic twine for the baler according to TU-6-06-S128-82. The characteristics of the recommended strapping material are presented in Table 1.
After wrapping the bale, the tractor driver opens the rear part of the chamber using a hydraulic cylinder, thus disengaging the cam clutch on the drive of the pressing conveyor.
Later, when the drive is turned on, due to the rotation of the lower rollers, the bale is unloaded from the bale chamber onto the ground. After closing the rear part of the chamber, the unit again moves along the roll, and the process of forming the roll is repeated.
To obtain a high-quality roll, its good preservation, it is necessary that the moisture content of the pressing mass is within 20.23%.
To reduce the loss of the material to be pressed during harvesting of legumes, as well as to form a high-quality bale on fine dry straw, it is recommended that pressing be carried out in the morning and evening.
For high-quality and reliable operation of the baler, the width of the selected swath should be no more than 1.4 m.
To carry out work on the procurement of fodder, in agrotechnical terms with the highest yield per unit area with minimal labor and funds per unit of production, it is necessary to ensure a high organization of mechanized labor.
The basis of the feed production workshop should be a complex mechanized squad or a specialized team with an approximate set of equipment presented in table. 2.
The PR-F-750 baler is operated in conjunction with loading and unloading equipment. For loading the bales formed by the baler, loaders PF-0.5 and PKU-0.8 with the PT-F-500 device are used. The most expedient technological scheme is one in which two devices are involved: one with a PKU-0.8 loader for picking up and loading, the second with a PF-0.5 loader for stacking. The unit with the captured bale approaches the vehicle, and loading is carried out both from the side and from the side of the tailgate (Fig. 10).
On a 2PTS-6 trolley with folded and tied side boards, it is possible to load without lashing (for transportation within the field) 5. 7 rolls after PR-F-750. At the places where rolls are laid for long-term storage, it is advisable to use a device in a unit with a PF-0.5 loader, which makes it possible to form higher stacks than PKU-0.8 (Fig. 11).
The relatively high resistance of rolls to atmospheric precipitation makes it possible to store them in the open air with predominantly stacking in one row in a dry, elevated place. In Western European countries, rolls are stacked in stacks and covered with foil or loose straw.
The service life, technical condition and constant readiness of the baler for work depend on timely and high-quality daily and periodic maintenance (every 60 hours of operation).
Maintenance is carried out using a tool from the tractor kit or stationary and mobile maintenance units.During daily maintenance, before starting to work with the baler, it is necessary to clean the front and the shaft of the pressing mechanism from dirt, plant residues.
By external inspection, check the completeness of the baler, the fastening of the covers, critical bolted joints, the absence of oil leaks in the joints, the tension of the chains, if necessary, align or replace the teeth of the pick-up.
When carrying out periodic maintenance, in addition to daily maintenance, it is necessary to check and bring the pressure in the tires of the baler's wheels to normal (should be 0.35 MPa or 3.5 kg / cm); check chain tension; correct adjustment of the engagement clutch, lubricate the conveyor engagement clutch.
After periodic maintenance, the detected faults are eliminated. Possible malfunctions and methods of their elimination are given in Appendix 2.
These safety measures do not relieve the management of the farms from the obligation to take additional measures if necessary.
Once again I am repairing the baler and something tells me that it will not be the last).