In the maintenance of agricultural tools, it is important to choose the right related and consumable materials. Particularly acute, in this sense, is the question: what oil to fill in a walk-behind tractor. The performance of the equipment, its service life and a number of other factors that relate to a particular brand of walk-behind tractor depend on this choice. Some manufacturers clearly indicate in the technical documentation that comes with the device the recommended brand and type of oil. However, such information is not always saved, and as a result, the user of the equipment is forced to follow the basic recommendations, ignoring the manufacturer's warnings.
What oil is better to fill in a walk-behind tractor engine
There is a lot of controversy about what kind of oil should be poured into the engine of a home walk-behind tractor. Those who consider their point of view to be correct, others refute it, but only one thing can resolve these disputes - the instructions for the device created by the manufacturer of the equipment. Each of the manufacturers in it indicates the exact amount of oil to be filled in, the method for measuring this amount, and even the type of oil that is used.
What all their points of view agree on is that the oil should be designed specifically for the motor. There are two types of oils - two-stroke oils and four-stroke oils. Both of these options are used for walk-behind tractors, depending on which engine is installed in the model. Mostly walk-behind tractors have 4-stroke engines, but to determine the type of engine, you should look at its factory marking.
Both types of oils are divided into 2 types according to their composition. This criterion allows you to distinguish between semi-synthetic and synthetic oils, or, as they are also called, mineral oils. There is an opinion that synthetic oils are more versatile and can be used all the time, but this is not the case.
The use of oils is divided according to the seasonality of the use of the walk-behind tractor. So, some models can be operated in the winter season, and due to the thickening of natural components that are sensitive to lower temperatures, semi-synthetic oils cannot be used like mineral oils in winter. But the same oils are successfully used in summer and reliably protect equipment.
Thus, oil is used not only as a lubricating agent for engine components, but also as a medium that effectively retains soot produced during fuel combustion and metal fractions that appear during the erasing of parts. That is why most oils have a thick, viscous structure.
What kind of oil to fill in the walk-behind tractor gearbox
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Despite the fact that the gearbox, like the engine, is actively working, they require completely different types of oils for lubrication. The inside of the gearbox is filled not with engine oil, but with gear oil, which provides an excellent degree of lubrication of moving parts. The amount of oil to be filled is also determined by the manufacturer, but not the engine, but the device as a whole, in this case it is a walk-behind tractor.
What oil is better to fill in a diesel walk-behind tractor
In addition to the fact that oils are divided into synthetic and mineral oils, they are also divided according to the types of fuel that the engine burns. According to the API standard, three types of oils are distinguished - for gasoline engines, for diesel engines, as well as universal oils that are suitable for devices of both categories. The first category includes oils with two-letter markings. In this case, the first letter on the left must be S, the second can be any of the list (A, B, C, F, G, H, J). If the oil is intended for diesel engines, then the first letter on it will be different, namely C.
Universal oils suitable for all types of engines are usually marked with a double marking, which indicates 2 types of devices at once through the sign /. For example, it could be SF/CC, or SG/CD.
As for a more detailed interpretation of the markings, it is worth noting that the quality of all oils is determined precisely by the second character in the marking. The closer it is to the beginning of the Latin alphabet, the worse the quality of the oil. Thus, a CC-marked diesel oil performs slightly worse than a CD-marked engine oil.
What kind of oil to fill in the Neva walk-behind tractor
The peculiarity of the Neva motoblocks lies in a wide variety of modifications of the model range due to the use of various engines, respectively, from different manufacturers. Therefore, before choosing oil for a walk-behind tractor, you should once again review the instructions for the engine and check which oil is recommended by its manufacturer. Read about the features of motoblock models and technical characteristics in the relevant articles -, as well as the technical characteristics and device of motor cultivators -,.
What kind of oil to fill in a Subaru walk-behind tractor
One of the most popular models of Subaru brand engines installed in walk-behind tractors is the Robin Subaru model. This engine is quite sensitive to the quality of the oil used, so the manufacturer recommends automotive oil #20, #30, as well as 10W-30 according to SAE classification. The recommended oil grade is SE or higher. At the same time, the quality of the oil must be no worse than SG. Therefore, once again, asking the question: what kind of oil to fill in the Subaru walk-behind tractor, ideally, you should give preference to oil marked SJ or SH if it is not available.
In order for the walk-behind tractor to work flawlessly for a long time, it must be properly maintained and operated. Oil is a key factor in keeping an engine running. We will try to figure out what kind of oil to fill in the engine of a walk-behind tractor on this page of the site.
The most correct recommendation for the selection of oil will be the recommendation of the engine manufacturer for the walk-behind tractor. Therefore, we will familiarize ourselves with the operating instructions for the main engine manufacturers for walk-behind tractors and give excerpts from the instructions.
The choice of engine oil, like any other type of oil, depends on two main parameters - the operating category and the viscosity class.
CLASSIFICATION OF OIL TYPES
API classification by operating category (American Petroleum Institute). For more details see
CLASSIFICATION OF OIL GRADES BY VISCOSITY
SAE (Society of Automotive and Transportation Engineers) classification. See more
In short:
Winter- with the letter W (Winter). Oils that meet these categories are low viscosity and are used in winter - SAE 0W, 5W, 10W, 15W, 20W, 25W
Summer- no letters. Oils that meet these categories are high-viscosity and are used in summer - SAE 20, 30, 40, 50, 60.
All season- at the moment, universal oils are most widely used, which are used both in winter and in summer.
Such oils are designated by a combination of winter and summer series: 5W-30, 10W-40
In winter, use an oil with a lower SAE number (less viscous), and in summer an oil with a higher SAE number (more viscous).
The multi-viscosity oil has all-round stability in the face of seasonal and temperature changes. For example, an SAE 10W-30 type oil is suitable for use as an all-weather oil. At low temperatures, it is equivalent in viscosity to SAE 10W oil, and in operation it has the same lubricating properties as SAE 30.
| Motoblock engine brand | Engine oil recommended by the manufacturer | ||
| summer | winter | operating class | |
| Robin Subaru (subaru) | SAE 10W-30 - in moderate climates | SAE 5W-30 - in cold regions | Automotive engine oil; SE class or higher (recommended SG,SH or SJ) |
| Honda (Honda) | SAE 10W-30 oil is recommended for use at any temperature. If you wish to use a seasonal oil, then choose an oil with an appropriate viscosity grade based on the average temperature in your area. |
SG, SF. | |
| Lifan (lifan) | SAE-30 | SAE-10W-30 - all season | |
| Briggs & Stratton(briggs) | When operating below 0°C, Briggs & Stratton recommends the use of synthetic oil. If you do not have synthetic oil, you can use non-synthetic oil Briggs & Stratton 10W-30 part 998208 Note: Synthetic oil that meets the ILSAC GF-2 certification mark, API and API service symbol of “SJ/CF ENERGY CONSERVING” or higher can be used in all temperatures. Change synthetic oil according to the usual schedule. Air-cooled engines heat up faster than car engines. Using a non-synthetic thickened oil (5W-30, 10W-30, etc.) above 4°C will result in high oil consumption. If such oil is used, the oil level should be checked more frequently. |
SF, SG, SH, SJ or higher | |
| DM-1-01 (JSC Kaluga engine) |
M6 3 /12G 1 or M5 3 /10G 1 GOST 10541-78, oil that meets the requirements of API: SF; SG; SH and SAE: 10W30; 15W30 | ||
| DM-1K Instruction from JSC "Red October" |
M10GI, M12GI TU 38.10148-85 M6 3 /12G 1 or M5 3 /10G 1 GOST 10541-78, |
||
| Cascade MB-6 | Engine oil M-5z / 10G1, M-6z / 12G1 GOST 10541-78 (It is allowed to use engine oils for carburetor engines according to SAE classification in accordance with recommendations for use at various ambient temperatures. Mixing mineral and synthetic oils is not allowed.) | ||
Engines of these brands are installed on almost all currently produced walk-behind tractors such as Neva, MTZ, Salyut, Cascade, OKA, Ugra, Tselina, Tarpan, Agat, Favorit, MKM and many others.
Motors of such well-known companies are tested and tested on the indicated oils, therefore, the result of operation in accordance with the recommendations of the manufacturers will be the best. Using engine oil of the specified grade and viscosity will greatly extend engine life and performance. Using too little or too much oil can cause serious problems, including engine seizure.
In gasoline engines for general use, only SE, SF, SG engine oils should be used.
| SA | For low stress applications where additives are not required |
| SB | For use in the medium stress range. It is characterized by low oxidation, stable lubricating properties, protects engines from wear and prevents corrosion of bearings. |
| SC | For use in gasoline engines manufactured between 1964 and 1967. and not equipped with a PCV system. Minimizes deposit formation over a wide temperature range as well as engine wear and corrosion. |
| SD | For use in gasoline engines manufactured between 1968 and 1971 equipped with a PCV system. Compared to the SC category, it better reduces the formation of deposits over a wide temperature range, wear and corrosion of the engine. |
| SE | For use in gasoline engines manufactured after 1972. Compared to the SD category, it prevents the formation of deposits over a wide temperature range, reduces engine wear and corrosion. |
| SF | For use in gasoline engines manufactured after 1980. Compared to the SE category, better prevents the formation of deposits over a wide temperature range, reduces engine wear and corrosion. |
| SG | Appeared in 1988. According to its characteristics, it is comparable to SF category oil and is distinguished by additional quality improvements. |
| SH | The highest category of motor oils introduced since 1992. |
| CA | For use in conditions of low and medium mechanical stresses in engines running on low sulfur diesel fuel. Reduces bearing corrosion and deposit formation at high temperatures, but not suitable for high mechanical stress conditions. |
| CB | For use in conditions of low and medium mechanical stress in engines running on high sulfur diesel fuel. Compared to category CA, it additionally reduces corrosion of bearings and other engine parts. |
| CC | For use in conditions of medium and high mechanical stress in engines without superchargers and turbochargers. Sometimes used in gasoline engines operating under particularly high loads. Reduces the formation of deposits at high temperatures (and in gasoline engines - at low temperatures) and corrosion of bearings and other engine parts. |
| CD | For use in high-speed engines without superchargers and with turbocharging. Reduces the formation of deposits at high temperatures and corrosion of bearings and other engine parts. |
Here is information on the oils used from the website of the manufacturer of motoblocks and cultivators of the Patriot brand (Patriot)
Patriot engine oil for 4-stroke engines (information from the official website)
Special high-quality engine oil for use in modern four-stroke gasoline and diesel engines with air and water cooling, installed on lawn mowers, cultivators, generators, walk-behind tractors, mini tractors and other equipment.
The increased content of additives reliably protects the engine under extremely severe operating conditions, providing excellent anti-wear, anti-corrosion properties and increasing the oil life until it is changed.
The special formula ensures the stability of the oil film.
APPLICATION PROVIDES:
1. Preventing the formation of soot, varnish deposits and sludge;
2. Cooling of pistons, crankshaft bearings and other engine parts;
3. The most effective protection of the engine against wear during cold start;
4. Noise reduction during engine operation;
5. Extension of engine life;
7. Impeccable cleanliness of the engine.
 |
 |
 |
| 4-stroke semi-synthetic oil Expert is a special all-weather semi-synthetic engine oil for use in modern four-stroke gasoline and diesel engines. |
4-stroke semi-synthetic oil Specific is a special all-weather semi-synthetic engine oil for use in modern four-stroke gasoline and diesel engines. The use of the latest additive packages allows you to reliably protect the engine under extremely difficult operating conditions. The oil has excellent anti-wear, anti-corrosion and energy-saving properties. |
Supreme 4-stroke mineral oil is a special high-quality, efficient motor oil for use in modern four-stroke air- and water-cooled gasoline and diesel engines. The increased content of additives reliably protects the engine under extremely severe operating conditions, providing excellent anti-wear, anti-corrosion properties and increasing the oil life before its replacement. |
The frequency of changing the oil in the motoblock engine
- check the oil level with the engine on a level surface, wait until it drains into the crankcase.
- when changing the oil, drain it on a hot engine by unscrewing the drain and filler caps
- do not use additives and oil additives
- dispose of used oil in an environmentally friendly way, do not dump it on the ground, do not throw it in a trash can, the best option is to take the oil in a closed container to a local recycling center.
Please note that there are engines that have an additional gearbox built in, which also requires periodic oil changes. Here is an excerpt from the owner's manual for the Honda engine.
Maintenance of a walk-behind tractor consists in carrying out a number of works that ensure trouble-free and safe operation of the machine during the entire period of its operation. Such works include changing the oil in the units of the walk-behind tractor, checking and preventing engine systems, adjusting control mechanisms, caring for tires, etc.
The walk-behind tractor must be cleaned of dirt and installed in a horizontal position, leaning on the third wheel (if any) or a stand that ensures the stability of the machine.
When running in a new walk-behind tractor during the first 30 hours, it is advisable to operate the machine in a gentle mode, avoiding overloads and running at full throttle. This mode will allow the parts to run in and avoid their premature wear.
Maintenance interval
Proper care of walk-behind tractors implies a planned preventive nature of the work. They include maintenance of the walk-behind tractor before each operation and measures to achieve a certain operating time of the walk-behind tractor. Before starting work, check:- Oil level in the engine crankcase, gearbox (reducer), clutch.
- Reliability of tightening threaded connections.
- State of the safety devices.
- Tire pressure.
Each manufacturer sets its own terms for maintenance, depending on the characteristics of the components and materials used in the walk-behind tractor. Estimated operating hours, upon reaching which the walk-behind tractor is serviced and adjusted, are given in the maintenance table below.
| Ongoing work | After each use | After 5 hours | After 25 hours | After 50 hours | After 100 hours or 1 time per season | Of necessity |
| Cleaning the walk-behind tractor and its components | + | |||||
| Checking the air filter | + | |||||
| Air filter replacement | + | |||||
| Checking the spark plug | + | |||||
| Spark plug replacement | + | |||||
| Changing the oil in the crankcase* | + | |||||
| Changing the oil in the gearbox and clutch | + | |||||
| Lubrication of control cables | + | |||||
| Clutch cable adjustment | + | |||||
| Silencer replacement | + | |||||
| V-belt tension adjustment | + |
* The first oil change in the crankcase must be carried out after the first 2-5 hours (different manufacturers indicate different times) of operation.
The table is given for reference. The exact timing of the maintenance is set out in the operating instructions for specific models of walk-behind tractors.
Engine
Most light and medium walk-behind tractors are equipped with air-cooled four-stroke gasoline engines. Their maintenance includes the following main activities:- Control of the oil level in the crankcase, its regular replacement.
- Maintenance of the ignition system (checking and replacing the spark plug, checking the gap between the ignition coil and the magnetic circuit).
- Maintenance of the fuel supply system (checking the tightness of the system, cleaning the fuel and air filters, adjusting the carburetor, etc.).
Parts of a running or recently stopped engine can become very hot, so be careful not to touch them with bare hands to avoid burns.
Engine lubrication system. If the walk-behind tractor was purchased without oil in the engine crankcase, it should be filled during preparation for work. For engine lubrication, motor oils for gasoline engines are used, which have the required viscosity according to SAE and API classification. Specific brands of oils are indicated in the operating instructions for the walk-behind tractor. SunGarden, in particular, recommends using oil of the "SF", "SG", "SH", "SJ", "SL", "SM" brands according to the API classification for the walk-behind tractor (the symbol S means that the oil is intended for four-stroke gasoline engines ) or according to the SAE classification, guided by the diagram below.
Selection of oil viscosity according to ambient temperature (SAE classification)
The first oil change in the crankcase is carried out after 2-5 hours (different manufacturers indicate different times) of the walk-behind tractor. Subsequently - according to the instruction manual (usually after 25 hours of operation). The oil change is carried out with a warm engine (this will ensure good oil flow, necessary when changing it) in the following order:
- The oil filler cap opens.
- The drain plug is pulled out.
- Oil is drained into a previously substituted container (10-15 minutes).
- The drain plug is screwed on.
- Oil is poured to the required level (the level can be checked with a dipstick).
- The lid is screwed on.
For example, on a SunGarden walk-behind tractor, oil must be poured into the crankcase to the lower edge of the oil filler neck.
Ignition system. Motoblocks usually have a non-contact electronic ignition system, which consists of a magnetic circuit built into the flywheel, an ignition coil, a high-voltage wire and a spark plug. The distance between the magnetic circuit and the ignition coil and the ignition timing are set at the factory and usually do not require adjustment. The maintenance of the walk-behind tractor in this case comes down to checking the condition of the candle - every 25 hours of operation - or replacing it - after 100 hours of work of the walk-behind tractor.
To check or replace the candle, remove the cap of the high-voltage wire and unscrew it with a candle wrench. Inspect for the presence of soot and measure the gap between the electrodes with a probe. Depending on the brand of candle, the latter should be about 0.8 mm (different manufacturers give different recommendations). In the presence of soot, the candle is cleaned. The condition of the threaded part of the candle and its skirt is also checked. In the presence of damage (cracks on the body, wear of the electrodes, wrinkling of the thread), the spark plug must be replaced.
When operating some models of walk-behind tractors, it is necessary to control the gap between the magneto and the ignition coil. The figure below shows the clearance adjustment scheme for the Cascade MB6 walk-behind tractor. The required distance between the ignition coil 1 and the magnetic shoe 3 is set by unscrewing the screws 2 and shifting the coil relative to the flywheel.
1 - electronic magneto, 2 - screw, 3 - magnetic shoe.
The starting mechanism and ignition system of the Cascade MB6 walk-behind tractor: 1 - starter handle, 2 - fan housing, 3 - protective casing, 4 - cylinder, 5 - cylinder head, 6 - magneto, 7 - flywheel.
Fuel supply system
Fuel filter. A clogged filter can cause engine malfunction due to insufficient fuel flow to the carburetor. When checking the condition of the filter, it is necessary to drain the fuel from the tank, remove the fuel filter and inspect it for contamination. Clean and reinstall if necessary.Air filter. The air filter cleans the air entering the carburetor. When it is contaminated, the qualitative and quantitative composition of the fuel mixture is disturbed, resulting in a malfunction of the engine. The condition of the air filter should be checked every 5 hours of engine operation. After 50 hours of operation, the filter should be cleaned or replaced.
To clean the air filter, you need to remove its cover, remove the filter element (there may be several) and clean it. The cleaning technology depends on the filter material and is specified in the instruction manual. Paper filters are cleaned with a vacuum cleaner and a light tap on a hard surface. Foam rubber is washed with water and some household detergent and dried.
The air filters of some models of walk-behind tractors are in an oil bath or are impregnated with oil. In this case, after cleaning the filter, it is necessary to saturate it with oil again or change the oil in the filter housing.
Carburetor. The initial adjustment of the carburetor of the walk-behind tractor is carried out at the factory. Some manufacturers of walk-behind tractors do not mention at all in the instruction manuals the need to adjust the carburetor, wanting to protect this delicate and capricious mechanism from the intervention of inexperienced users. Those manufacturers that provide for this possibility are limited to recommendations for adjusting the idle speed, the procedure for which is set out in the instruction manual. The essence of any idle adjustment is to achieve stable engine operation at minimum speed. Adjusting the carburetor of a walk-behind tractor according to the instructions for another walk-behind tractor (engine) can lead to engine damage.
Gearbox (reducer)
Gearboxes of motoblocks use gear oils (SAE 80W-90, etc.). The oil level is checked before each use of the machine. To do this, the oil dipstick is removed from the filler hole, wiped with a rag, inserted into the hole again and removed again. The boundary between the dry and oily surface of the dipstick must be between the minimum and maximum level marks. If there is not enough oil, it must be topped up.The oil in the gearbox (reducer) is changed every 100 hours of operation of the walk-behind tractor. Some manufacturers advise changing the oil after 50 hours of operation. When changing the oil, you must:
- Remove the oil filler plug (with dipstick).
- Unscrew the drain plug and drain the oil into a substituted container for 15 minutes.
- Screw in the drain plug.
- Pour clean oil into the walk-behind tractor gearbox to the required level (check with a dipstick).
- Screw in the fill plug.
Clutch
In walk-behind tractors, a disc clutch is most often used, operating in dry or wet (oil) mode. In the latter case, SAE 80W oil or equivalent is used. If an oil bath clutch is implemented in the walk-behind tractor, a periodic oil change is necessary, which is carried out simultaneously with the replacement of the lubricant in the gearbox - after 100 hours of operation.V-belt drives. The belt tension is adjusted every 25-30 hours of operation of the walk-behind tractor. Belts are changed in case of breakage, cracks deep to the carrier layer, delaminations of more than 1/3 of the belt length and the impossibility of compensating for belt elongation by tensioning mechanisms.
Control mechanisms
Maintenance of control mechanisms consists in lubricating the cables and adjusting the free play of the control levers. The cables are lubricated at intervals of 100 hours of operation, but at least once per season. The free play of the handles is checked and, if necessary, adjusted daily. More detailed information on how to set up the walk-behind tractor in these cases can be found in the instructions for a particular walk-behind tractor. In particular, insufficiently tensioned cables can cause incomplete closing or disengagement of the clutch.wheels
Operation and maintenance of motoblock tires is carried out in compliance with the usual rules for the operation of pneumatic tires. It is necessary to maintain the pressure within the normal range (in the range of 1-2 kgf / cm 2, depending on the characteristics of the tires used) and inspect the wheels daily for damage and defects. When installing the tire, you need to focus on the image of the arrow on the sidewall of the tire, which shows the direction of rotation of the tire, in which the tread provides the greatest traction for the wheel. Operation of the walk-behind tractor with reduced tire pressure leads to their premature failure as a result of delamination. Increased pressure is also fraught with accelerated wear.
Refueling a walk-behind tractor
When working with fuel, all necessary safety rules must be observed.The brand of gasoline in terms of octane number must comply with the requirements of the operation manual. For imported walk-behind tractors, it is usually recommended to use gasoline with an octane rating of at least 92. Fuel should be filled no higher than the lower edge of the neck, too full filling of the tank can lead to leaks and a fire hazard.
Before each start, the machine is checked for fuel leaks. Detected leaks are eliminated.
Starting a walk-behind tractor
Before starting the engine, the walk-behind tractor must be filled with fuel, there must be oil in the engine crankcase, gearbox and other components whose operation requires an oil bath, the ignition must be turned on, the gear lever must be in neutral position. Consider the launch of a walk-behind tractor using the Cascade MB6 gasoline walk-behind tractor as an example. The start of this walk-behind tractor is carried out in the following order:- Open the fuel cock, wait 2-3 minutes to fill the carburetor with gasoline.
- Put the throttle stick in the middle position.
- Close the carburetor choke (if the engine is cold). When starting a warm walk-behind tractor, it is not recommended to completely close the air damper, because. this can lead to an over-rich fuel mixture and the engine will not start.
- After making sure that the walk-behind tractor is in a stable position, slowly pull the cable until the engine begins to perform a fuel compression cycle (at this moment the cable will begin to exert a little more resistance). Now pull the cable in a quick, continuous motion across your entire arm. While holding the starter handle, allow the cable to slowly rewind onto the spool. Do not allow the starter handle to hit the starter.
- If the engine does not start, try again with the choke open. If after the second attempt the engine does not start, wait 2-3 minutes to fill the carburetor with gasoline and repeat the start with the air damper closed and with the damper open alternately.
- After starting the engine, open the choke by turning its lever counterclockwise until it stops.
- Set the throttle lever to low speed and warm up the engine in this mode for 2-3 minutes.
If starting with the choke closed more than two times and gasoline dripping from the carburetor, close the fuel cock, open the choke and pull the starter cord five to seven times. After starting the engine, open the fuel cock and run the engine at low speed to warm up the engine.
To stop the engine, move the throttle stick to the STOP position as far as it will go. Close the fuel cock.
Motoblock storage
The walk-behind tractor must be stored in a dry, well-ventilated room that does not contain aggressive substances (acids, alkalis). When putting the walk-behind tractor into storage, it is necessary to perform a number of works:- Clean the walk-behind tractor from dirt.
- Drain fuel from tank and carburetor.
- Drain the oil from the engine crankcase.
- Having unscrewed the candle, pour 20 g of clean engine oil into the engine. Plug the hole with a rag and turn the crankshaft several times, then install the candle in place without putting a cap on it.
- When storing for more than 3 months, install the walk-behind tractor on stands, unloading the tires.
For gearbox and clutch oil, manufacturers' recommendations may vary. Some recommend draining the oil when storing the walk-behind tractor, others - changing it to fresh.
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Reducer for motoblock Neva mb-2 assy
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Reducer for motoblock Neva MB-2 assy
Since June 2013, they have been producing a series of MB- 23 where the gearbox and engine are reinforced.
Reducer is designed to transmit torque from the motor (through a V-belt transmission) to the wheels of the walk-behind tractor, the configuration of the gear ratio (speed) and the configuration of the direction of movement of the walk-behind tractor (only for the MB-2 walk-behind tractor).
The MB-2 motoblock reducer assembly is shown in fig. 32.
Rice. 32. Reducer walk-behind tractor MB-2.
Rice. 32. Reducer motoblock MB-2: 1. drain screw; 2.7. bearing 180306; 3. cuff; 4. axle shaft right; 5. axle cover. 6. sprocket (right axle); 7. spring; 8. chain (49 links); 9. zint holes control oil levels; 10. sleeve; 11. Block shaft sprocket; 12. half of the body is right; 13. sleeve; 14. block sprocket sprocket; 15. an asterisk of an intermediate shaft; 16. sleeve; 17. intermediate shaft; 18. sleeve; 19. input shaft; 20. filler plug: 21. shift shaft; 22. switch fork; 23. bearing 204; 24. gear wheel; 25. cuff; 26. sleeve; 21. gear wheel; 2S. block asterisk; 29. sleeve; 30. gear wheel; 31. gear wheel; 32. block shaft; 33. sleeve; 34. half of the body is left; 35. fork of separation of semiaxes; 36. semi-axle clutch; 37. axle shaft left; 38. cuff; 39. bearing 180306; 40. gasket; 41. lever; 42. spring, 43. screw; 44. fee. Kinematic diagram of the gearbox.
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The detailed device of the MB-2 reducer is shown in fig. 33 and 34.
Rice. 33. MB-2 gearbox housing.
Rice. 33. MB-2 gearbox housing: 1. screw; 3.2. pad; 3. plug; 4. pin, 5. board; 6. washer; 7. M6 bolt: 8. gear selector spring; 9. screw M6x34; 10. nut M6; 11.shift lever; 12. ball handle; 13. Bolt Mb; 14. cover; 15. gasket; 16. M6 bolt; 17. plate; 18. spring washer; 19. washer A8; 20. ring ST41-29.5-4; 21. axle cover; 22. gasket; 23. half of the body is left; 24. gasket; 25. half of the body is right; 26. washer.
Halves 23 and 25 (Fig. 33) of the gearbox housing are cast from duralumin alloy and are bolted to each other through a sealing gasket 24. They have flanges for fastening caps 14 and 21 of bearings with cuffs.
Rice. 34. Reducer MB-2, device.
Rice. 34. Reducer MB-2, device: 1. block-shaft; 2.4. bushing, 3. block sprocket; 4. chain (25 links); 5. connecting link; 6. washer; 7. sleeve; 8. asterisk; 9. washer; 10. intermediate shaft; 11. input shaft, 12. gear shift shaft; 13, 14. gear wheels; 15. shift fork; 16. bearing 204; 17. cuff; 18. spring; 19. shift lever; 20. sealing ring; 21. washer; 22. axis; 23. spring; 24. fork of separation of semiaxes; 25. bracket; 26. screw M6x10; 27. washer; 28. a cable of separation of semiaxes; 29. cuff; 30. bearing 180306; 31. thrust axis; 32. axle shaft left; 33. cotter pin 2×14; 34. semi-axle clutch; 35. sleeve; 36. chain link; 37. chain (49 links); 38. axle shaft right.
Changing the oil in the gearbox of the agate walk-behind tractor.
Note. In gearboxes of motoblocks of early release, instead of bushings pos. 5, 7, 35 bearings were installed: pos. 5. bearing 300, pos. 7. bearing 202, pos. 35. bearing 304 GOST 833-75.
Inside the housing (Fig. 34) there are parts of the gear shift mechanism (at the top), the configuration of the gear case from the input shaft 11 of the gearbox to the output axle shafts 32, 38 and the mechanism for disengaging the axle shafts (at the bottom).
supporting frame walk-behind tractor MB-2 form two squares 5 and 21 (Fig. 41). where the gearbox, engine, steering and devices for connecting trailed and outboard implements and units are attached
Rice. 41. Carrier frame of the MB-2 walk-behind tractor.
Rice. 41. Bearing frame of the MB-2 walk-behind tractor: 1. right wing; 3.2. bolt M6, 3. bolt M8; 4. M10 bolt; 5. right angle, 6. post; 7. kingpin; 8. retainer; 9. bracket; 10. washer 10T; 11. nut 10; 12. limiter; 13. wing left; 14. washer A6; 15. washer 6; 16. nut 6; 17. washer A10; 18.nut 8; 19. washer 8T; 20. washer A8; 21. left square; 22. pin; 23. bolt M10.
The control device of the MB-2 walk-behind tractor is shown in fig. 42. The control column 1 is installed on the rack 6 (Fig. 41) of the carrier frame.
Rice. 42. Steering motoblock MB-2.
Motoblock NEVA MB-2S 7.5 PRO. First replacement oil in the gearbox
KEY DOP
Change of oil V motoblock gearbox NEVA MB-2S 7.5 PRO. Operator. daughter Anya, so do not judge strictly for jumping.
Rice. 42. Steering wheel motoblock MB-2: 1. control column; 2.7. washer A12; 3. bolt; 4. cork; 5. collar; 6. wing nut; 7. throttle cable; 8. washer; 9. spring; 10. chain; 11. earring; 12. body; 13. axis; 14. VMB screw; 15. control lever for disengagement of semiaxes; 16. throttle lever; 17. handle; 18. steering wheel; 19. washer A8; 20. cotter pin 2×16; 21. washer A6; 22. washer 6; 23. nut 6; 24. steering wheel; 25. clutch control lever; 26. guide; 27. hairpin; 28. thrust; 29. collar.
The supporting frame of the MB-1 walk-behind tractor, as opposed to the MB-2 walk-behind tractor. appears as a pallet / (Fig. 43) together with squares 8 and 21 (Fig. 35), welded to the halves of the MB-1 gearbox housing, and bracket 7 fixed to these squares with bolts (Fig. 43).
On certain models of motoblocks of the MB-1 type (nettle, MB-IP), an arc 3.2 may be absent.
Rice. 43. Elements of the supporting frame of the MB-1 walk-behind tractor.
Rice. 43. Elements of the supporting frame of the MB-1 walk-behind tractor: 1. pallet; 4. arc; 3. bolt M8x30; 4. bolt M8x18; 5. washer; 6. nut; 7. bracket; 8. bracket; 9. kingpin; 10. retainer; 11. limiter; 12. bolt M10x70; 13. pin; 14. washer; 15. nut.
The control structure of the MB-1 walk-behind tractors is shown in fig. 44.
Along with the walk-behind tractor, you also get a set of cutter-cultivators designed for loosening the earth. This operation, you, is carried out in the spring in the process of preparing the land for sowing.
Replacement oil in the gearbox of the walk-behind tractor mb.
Technical properties:
Capture width (with 8 cutters), mm 1200
Depth of tillage, mm Up to 250
Productivity, ha/h 0.12
The number of mounted cutters must be made more than 4 (to ensure the stability of the walk-behind tractor) and even no more than eight (to prevent overloading of the gearbox parts). The cutters are placed symmetrically relative to the longitudinal axis of the walk-behind tractor, and, as follows, their number must be made even (Fig. 45).
Eight cutters are used when working on light soils, on clay. four. Adjust the depth of processing by deepening the limiter 3 (Fig. 1), fixed with a latch in the bracket 4.
The annotation helps to successfully fulfill the intended goal and take into account the countless aspects on which the outcome depends.
Malfunctions of the Neva MB 1 gearbox.
If you saw what oil flows along the output shaft, for you it will be necessary to remove the gear axle cover and replace the cuff. The prerequisite for the malfunction you will like the wear of the edge of the cuff of the axle shaft.
When the gearbox is jammed, you need to disassemble the walk-behind tractor in order to change the broken chain. A prerequisite for a malfunction and possibly an open circuit.
If you saw the absence of a kinematic connection inside the gearbox, this could be due to a broken sprocket in the block. To eliminate the malfunction, it will be necessary to completely disassemble the gearbox and change the defective sprockets.
Have you noted that there is no ability to turn on or shift gears? There are two probable circumstances: the shift cracker you like is destroyed or the thread of the shift knob you like is cut off. In any case, you will be able to repair the Neva MB 1 walk-behind tractor without the help of others. For you, you will need to disassemble the gearbox and change defective elements to our client.
Replacement oil in the gearbox of the motoblock Oka.
You noted that oil start to flow on the shift shaft? Do not rush to start repairs! First, you need to check the oil level in the gearbox, then fill and drain the excess amount. You will need to repair the Neva MB1 walk-behind tractor if the working edge of the shift shaft collar is worn out. For this purpose, you will need to disassemble the gearbox and change the cuff that has been worn out.
What to do, if necessary, to repair the gearbox of the Neva MB 2.4 walk-behind tractor? Probably the malfunctions go down with the walk-behind tractor 1, therefore it is necessary to emphasize only those breakdowns that are related only to the walk-behind tractor not MB 3.5.
If the separation of the semiaxes is unrealistic, there are two prerequisites for this breakdown. First, you need to check if the drive is adjusted correctly. If the adjustment is incorrect, change the tension of the axle disengagement cable. If one element of the axle disengagement drive has been exchanged, you will need to change it.
Have you noted the lack of fixation or spontaneous shutdown of the transmission? Here, the repair of the Neva 4.5 walk-behind tractor will be more difficult for you, because of course there are three possible prerequisites:
Incorrect adjustment of the walk-behind tractor in the switching mechanism. So the screws securing the shift mechanism board will need to be loosened, then turn on the first gear and carefully tighten the screws. There was an opportunity to successfully repair the Neva MB 2b walk-behind tractor!
The spring could break, in other words, the latches of the switching mechanism board are worn out. It will be necessary for you to carry out the replacement of defective parts and adjust what remains to be done by our client.
KEY DOP
The shift fork cheek may have worn out. To repair the Neva 2.7 walk-behind tractor, you will need to completely disassemble the gearbox and change the shift fork.
In the absence of a kinematic connection inside the gearbox, a break in the welding of the gear with the block-shaft could occur. Having set out to repair the Neva walk-behind tractor, it is necessary to completely disassemble the gearbox and change the block shaft.
Would you like to repair the gearbox of the Neva walk-behind tractor that you use as less often as possible? If your goal is to experience breakdowns occasionally, you need to keep the oil level in the gearbox under control and avoid unexpected load changes.
Often, users of walk-behind tractors have to repair the motor of the Neva walk-behind tractors. In spite of this necessity, the hard work is rarely to be done. For this reason, some users, of course, without the help of others, repair the engine of the Neva walk-behind tractor. We propose to find out the most common malfunctions, so if you wish, you can realize whether it is necessary to repair the Neva MB 2b walk-behind tractor and evaluate how quickly you can continue to work without problems.
While the engine is running, light smoke begins to come out of the muffler, and the candle electrodes remain dry, but do they develop a snow-white coating? The prerequisite for this malfunction is that you like a lean mixture more. In order to successfully repair the Neva MB 4 walk-behind tractor, it is essential to adjust the carburetor.
When starting the walk-behind tractor, the crankshaft does not spin? You will need to repair the Neva MB 2k walk-behind tractor, because the ratchet body or ratchet clutch could be destroyed. It is necessary to disassemble the starting device of the walk-behind tractor and change what remains to make defective elements for our client.
Each device used always requires proper operation and careful maintenance, therefore, in no case should the specified technical assistant be neglected. Modern farmers are increasingly using the well-known Neva walk-behind tractors in the course of their activities, which first appeared in the 80s and still have not lost their popularity, moreover, they have significantly increased the level of productivity and become a quality standard. But even such powerful devices fail over time, so you need to understand the main causes of malfunctions and understand how to get rid of problems with your own hands.
Repair of the Neva walk-behind tractor: how to do everything right without the help of specialists
First, it should be noted that among the many models of the specified manufacturer, it is MB1 and MB2 that are considered the most famous and widespread. Using their example, we will deal with common malfunctions.
MB-1
The focus was on the most common problems. Thanks to the instruction manual, you can easily deal with the features and carry out repairs yourself.
MB-2
- If the owner of the unit is faced with the impossibility of disengaging the axle shafts, he needs to check the drive adjustment and change the cable tension;
- Self-shutdown of gears is often the result of a malfunction such as a violation of the shift control system. Then you should reduce the voltage of the screws holding the board, turn on 1st gear and tighten the screws as much as possible again;
- If there is no kinematic connection in the gearbox, the shift fork must be renewed.
The solution to other problems and more detailed information on using the walk-behind tractor can be found in specialized instruction manuals designed for new devices and old ones.
Oil change on the Neva walk-behind tractor
It is worth noting that the choice of oil and the implementation of the replacement process itself are often quite problematic. Therefore, many owners of the Neva MB1 and MB2 walk-behind tractors are wondering: “What kind of oil to fill in the Neva walk-behind tractor and how to do it?”.
An important point: the filling process is the same for both models, only the types of oils for the gearbox differ:
- The unit must be installed vertically;
- Then a tank with a volume of at least 3 liters should be placed under the gearbox itself;
- It is necessary to unscrew the breather plug and carefully clean it of any contaminants;
- Having screwed in the oil drain screw, the existing oil should be drained;
- Now you can start filling in fresh gear oil of a certain type (volume 2.2 l);
- Screw in the breather plug, wipe the bushing and the axle of the drive belt tension lever and lubricate them with oil;
- Make sure the clutch mechanism is working and lubricate it.
It is always worth remembering that the gearbox of the Neva MB1 and MB1 walk-behind tractors must be serviced after every 100 hours of use.