How to change the oil seal on the gearbox of your power tiller

Algorithm of actions to replace the oil seal on the gearbox

The very process of replacing the sealant on the power tiller Neva is not particularly difficult. But it is important to understand the sequence of actions and be as careful as possible. First you must prepare the workplace, where you will disassemble and reassemble the power tiller. Then perform the following steps:

Drain the oil from the gearbox to do this will have to dismantle some elements of the technique;

remove the dust cover and oil seal this can be done with an ordinary screwdriver, try not to scratch the shaft;

Install the new part on the seat gently tap on the parts, but not too hard;

Pour transmission oil back in, use quality oil.

Algorithm of actions to replace the oil seal on the gearbox

The very process of replacing the seal on the motor-block “Neva” is not particularly difficult. But it is important to understand the sequence of actions and be as accurate as possible. First you need to prepare the workplace, where you will be engaged in disassembly and assembly of the power tiller. Then perform the following steps:

Drain the oil from the gearbox. for this you will have to dismantle some elements of the equipment;

remove the dust cover and oil seal. this can be done with an ordinary screwdriver, try not to scratch the shaft;

install the new part in its seating. gently tap the parts, but not too hard;

Pour transmission oil back in. use quality oil.

Device

The single-axle tractor MB 1 was very popular at one time, namely, in the eighties. nineties of the last century.

At that time, the market of special equipment, if it can be called such, was filled with products of Soviet factories, among the products of which the technique “Luch” was considered one of the best of its kind. The Luch MB 1 single-axle tractor confidently competed with the similar Niva power tiller.

It properly performed its basic function. to cultivate a field or a garden, transport goods: crops, firewood, building materials. That was the time when self-made trailers began to spread, and the tendency to turn these power tillers into mini-tractors was established.

Though the technical characteristics of the “Luch” MB 1 are inferior to modern power tillers in many respects, at the peak of its distribution they were at their best. the weight of the device assembled is one hundred kilograms, the speed from 3.6 to 9 kilometers per hour, on a level track, loaded, it consistently gives 8-99 kilometers per hour.

Acceleration up to a hundred, in principle, is possible, but only in very specific conditions, which hardly anyone has recreated. Fuel consumption is 1,5-2 liters per hour, the volume of the fuel tank is 3,6 liters, that is why experienced drivers always have a reserve canister with fuel.

A big plus is that the engine does not require constant filling of the oil. just timely maintenance, if necessary. The single-axle tractor is easy enough to operate. no great physical effort is required.

The minimum space required for turning has a radius of only 1100 millimeters. Driving of the walking tractor is smooth, thanks to the chain reducer with V-belt drive, gear shifting is smooth and jerk-free.

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For more information on the Luch MB1 power tiller, see

The transmission is reliable enough, with two forward and two reverse gears, and the engine is powerful enough for such a product. 5 hp. for good traction and stable speed. High cross-country ability and traction achieved by pneumatic tires with a large tread.

MB 1 is also easy to transport thanks to its quick-release handlebar and wheels. As for possible malfunctions, the occurrence of which is inevitable in the operation of any equipment, especially manufactured during the Soviet era, the repair of motor-block “Luch” will not be a serious problem.

Over the years that it has been used by farmers, cottagers and landowners a great deal of information has accumulated about the fast, inexpensive and reliable repair of. Thanks to the experience of its owners, who have found all the causes of failure, you will be able to repair your single-axle tractor “Beam” without excessive costs.

Malfunctions, no matter how serious they may seem, can be eliminated in the home workshop, using the most common tools, without resorting to the help of specialists. The only thing required of you is to diagnose the breakage as accurately as possible, and then it is a matter of little.

Composition

The motoblock gearbox includes the following important parts:

  • screws;
  • bearings;
  • axles;
  • sprockets;
  • housing;
  • bushings;
  • shift levers;
  • gears;
  • shaft;
  • clutch;
  • half axles;
  • board;
  • spring.

These are not all of the elements involved in the design of the reducer, but they are the key. Failure of one of them results in loss of performance and subsequent repairs.

Compared to a worm gearbox, a chain-and-worm gearbox is more reliable. It is convenient and easy to use, and can support reversing functions. The design is generally collapsible, with all components bolted together so that the chains and gears can be inspected as needed. Such reducers are installed on large crawler tractors that need a sturdy and reliable unit to transmit the force to wheels and cutters.

Most simple and common cause is a broken or sprained chain, but problems can be solved by anyone without calling a service center.

Repairs and malfunctions

Despite the fact that the Salyut range of power tillers is reliable, in some cases the gearboxes have malfunctions. Let’s consider the main problems that can be encountered, and how to deal with them:

  • Weak recoil after an oil change (no sealing, need to reinstall the packing and apply sealant).
  • Metal noise is heard (as a rule, it appears due to a lack of lubrication, maintenance is required immediately).
  • The mechanism hums (there is excess of mixture in the gearbox, you need to drain the excess fluid).

This is interesting: repair of the gearbox of the Neva MB 2 motorblock.

Other malfunctions may also occur due to broken bearings or gears, as well as dust covers, here it is necessary to immediately replace worn parts.

change, seal, gearbox, your

Today’s special equipment includes many quality structural elements. However, even so, it can be subject to breakdowns. Often, the failure of nodes associated with a lack of lubrication, which is extremely detrimental to the metal. That is why, in order not to face unnecessary waste of money, it is recommended to carry out timely maintenance. In this case the working machine will perform all its duties for a long time.

How to change the oil correctly

Proper use of the machine is assured by timely oil changes. It is able to provide a high degree of productivity, increasing the service life of the power tiller.

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If you use the machine too often, especially at higher speeds, you put it on the fast track for wear. Specialists do not recommend installing additional cutters by hand.

The chains are the first to suffer from increased loads. they slip because of damaged bushings. Excessive side loads cause wear of thrust washers and thus chain malfunctions. It is not recommended to operate the machine on a slope or turn sharply.

The Cascade single axle tractor requires oil filling every 50 hours. Before choosing engine oil and fuel, you should study the operating instructions in detail. See the Repair section for a list of manufacturer’s recommended substances that are specific to your model.

In summer it is worth to use 15W-40 oils, in winter. 10W-40, also domestic products are suitable. For transmission you should use TAP-15B, TAD-17I or 75W-90, 80W-90.

Using a power tiller it is important not to forget to check the oil level, change it regularly. This is the only way to prolong the working life of your land helper.

To change the oil correctly, the following rules must be followed:

change, seal, gearbox, your
  • install the machine so that the wings are parallel to the surface and the gearbox is tilted;
  • it is best to put the single-axle tractor on an elevated position, so it will be easier to drain the old oil;
  • unscrew the fill and drain plugs, do not forget to put a container or a pan;
  • after draining the old fluid, tighten the drain plug, pour fresh oil through the filler plug.

You can check the oil level in the gearbox with a dipstick or a wire (70 cm will be enough). It must be lowered into the filling hole all the way to the bottom. The volume that needs to be filled is 25 cm.

Power Weeder rotary shaft leakage ll Ashoka Automobile

Composition

The reducer of a motor-block includes the following important parts:

  • screws;
  • bearings;
  • axles;
  • sprockets;
  • housing;
  • sleeves;
  • shift levers;
  • spur gears;
  • shaft;
  • clutch;
  • half axles;
  • board;
  • spring.

These are not all of the elements that are involved in gearbox construction, but they are the main ones. Breakage of one of them leads to loss of performance and subsequent repair.

Compared to a worm gearbox, a chain-wheel gearbox is more reliable. It is convenient and easy to use, can support reverse function. As a rule, this is a collapsible design, where all elements are connected by bolts, thanks to which it is possible to inspect the state of chains and gears, if necessary. Such gearboxes are installed on large motor blocks, which need a sturdy and reliable unit to transmit the force to the wheels and cutters.

The easiest and most common cause of failure is a broken or stretched chain, but any user can fix the problem without going to a service center.

How to change oil seals on a power tiller?

The oil seals on your power tiller are consumables that need to be replaced regularly. It is necessary to change these parts at the first sign of oil leakage from the motoblock gearbox, otherwise the oil will completely leak from the mechanism, causing the latter to succumb to increased wear.

Replacement of the oil seal of a motor-block is performed in the following sequence:

  • First you need to remove the cutters from the shaft of the motoblock and thoroughly clean the built-in shaft of accumulated dirt, debris and oil residue;
  • Next, it is necessary to unscrew the bolts securing the cover of the installed reducer, knock the cover and carefully remove it;
  • After that, it will be necessary to pull out the old used oil seal, put a new one instead, and apply a thin strip of sealant along the edges of the connector;
  • All further assembly of the cutters on the shaft of your power harvester is performed in reverse order.
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Timely replacement of worn oil seals will prevent oil leakage from the gearbox of the motoblock, and will give the opportunity to preserve the service life of the rubbing parts of the mechanism. All of the above methods of oil selection, lubrication and replacement of oil seals are suitable for power tillers of the brands Neva MB-1 and MB-2,Farmer, Kaskad and Oka. Gearboxes in these motoblocks have a simple design, which allows you to perform their maintenance even a novice farmer.

single axle tractor okka repair gearbox with their own hands

Disassembling and reassembling gearbox of Oka, Neva and Kaskad (MB-1) processors Disassembling and reassembling gearbox MB-1

Gearbox of MB-1 power tiller is a base unit on which other assemblies and units of the power tiller are mounted. Therefore, in order to repair the gearbox with disassembly it is necessary to disassemble the single axle tractor, for which dismantle the engine, steering column, pallet, brackets with belt pulleys front and reverse, gear pulley, wheels.

Before disassembling the gear unit, clean it and drain the oil.

Remove rotary knob from shift knob by knocking out the pin holding it with a small pin.

Remove the set screw 11 and lift off the hub 9 and locking spring 10 from the shifting shaft 7.

Remove screws 17. the housing halves, then the tie bolts 7 (2 pcs.) и 10.

Put the gearbox on the left half of the housing, using a thin screwdriver or knife carefully so as not to damage the gasket, undo the gearbox housing halves and remove the right half. Leave the shim washers of the coupling bolts on the chain blocks.

Note. It is recommended to remove only defective parts from the gearbox without disassembling the whole gearbox.

To disassemble the shifting mechanism, remove retaining ring b from shift shaft 7, making sure the sprockets can move freely 31. 32 Remove the split pin 3 from the threaded part of the tap-change knob 1, unscrew it (counterclockwise) from the seal 8 and remove the handle and seal from the shaft.

Wash the removed parts and replace defective parts. Replace the oil seals on the change-over shaft after you have removed it from the gear unit.

Reassemble the gearbox in reverse order. Apply a thin coat of sealant to the mating surfaces of the housing halves.

Start joining the housing halves with the center coupling bolts 7 and 10. Tighten the bolts on the gear unit halves starting from the middle section with successive tightening of the bolts to the ends.

Check that all moving parts run smoothly before you finally tighten the screws.

The internal construction of the gearbox is shown in fig. 36-40.