How to remove the clutch cover on a brushcutter
How to Disassemble the Clutch on a Champion Trimmer
This article explains how to remove the clutch from most sling and string trimmers. Tips for removing difficult clutch drum screws are provided.
Here at eReplacementParts.com, one of the most common questions we get about lawn trimmers. Is how to remove a grass trimmer clutch. Grass trimmer clutches must be removed when replacing the clutch drum, replacing other clutch parts, or when you need access to the grass trimmer starter for repair, maintenance or replacement.Removing the clutch drum is a little tricky because when you turn the clutch drum screw, the piston will only rotate if the piston is somehow blocked. This article includes detailed instructions and pictures that explain how to remove the grass trimmer clutch and how to prevent the grass trimmer piston from rotating. For more information on line trimmers: Click here to read the article “line grass trimmers 101”. Tools required to remove the trimmer clutch:
For this demonstration, we are removing the clutch from the Ryobi SS30 String grass trimmer, but most grass trimmer clutches are removed in the same way.
To safely remove the clutch drum and perform other repairs, drain all of the grass trimmer’s fuel before beginning work.
- Open the fuel tank and carefully drain the gas.
- Pump the primer several times to remove excess fuel from the system.
- Close the tank cap and try to start the grass trimmer. If it starts, let it run until the remaining fuel is used up.
After removing the fuel, the grass trimmer is ready for disassembly. [Back to top] Steps for removing the trimmer clutch The first task in removing the clutch drum is to separate the grass trimmer shaft from its motor. 1.Remove the screws securing the shaft to the engine.
For the Ryobi SS30 this means unscrewing the four Torx 5 screws from the engine assembly.
[Back to top] 2. Disconnect the engine wires leading to the switch.
This is best done with a pair of pliers.
[Back to top] 3. Disconnect the throttle cable from the carburetor.
The throttle cable is usually held in place by the screw and the pin that connects it to the carburetor.
[Back to top] ( TIP : Now that the engine is completely removed from the grass trimmer shaft. The next step is to remove the clutch drum screw that holds the clutch drum to the engine. This is the only tricky part. involved in the removal of the clutch.To remove the clutch, remove the screw from the hole in the clutch drum that connects the drum to the engine. To remove the clutch drum screw, you must first secure the grass trimmer piston. Otherwise. drum screw rotation will only rotate the piston and the screw will not come out. To block the piston, you must first gain access to it by removing the spark plug of the grass trimmer.) 4. Remove the grass trimmer spark plug to gain access to the piston cylinder.
You should now be able to see the piston cylinder. [Back to top] 5. Tie a piece of nylon rope around the piston.
The grass trimmer piston must be secured, otherwise turning the clutch drum screw to remove the clutch drum will only turn the piston.
- Insert a short piece of nylon rope into the cylinder, leaving a little dangling so it can be easily removed.
- Slowly pull the starter cord to raise the piston.
When you feel resistance in the starter cord, you’ll know the piston is tightened enough to turn the clutch drum screw.
The screw drum is now ready to go. [Back to top] 6.Remove the clutch drum screw and remove the clutch drum.
- Remove the clutch drum screw located in the hole in the base of the clutch drum.
- Clutch drum screws: common thread and. Turn counterclockwise. to loosen up.
- Remove the clutch drum.
For the Ryobi SS30, this screw again requires a Torx 5 screwdriver.
[Back to top] 7.Remove the clutch discs.
The clutch and clutch drum should now be removed, and the grass trimmer starter should also be accessible. [Back to top] Conclusion The key to removing the grass trimmer clutch. Is to tie the piston with nylon rope. To start your grass trimmer repair, visit our grass trimmer parts page to find your grass trimmer by manufacturer. Or enter your grass trimmer model number in the search box at the top of this page.See. Our article “Finding Tool Patterns and Type Numbers” for more information on accurately finding parts. Thank you for using this and other eReplacementParts resources.com and machine information. [Back to top] What we’re about.
The brushcutter gearbox transmits the torque from the motor to the working (cutting) parts of the device.
This function is provided by the internal structure of the gearbox, which is a system of gears that reduce or increase the speed of rotation of the parts.
Gearboxes used for homesteading applications come in:
This classification is based on the type of traction characteristic, namely, the mechanical transmission of torque.
Gearboxes also differ in shape and size of the seating hole: it can be square, round or star-shaped. Of course, the most common are gearboxes with a circular seating. According to the location, the gearbox can be lower or upper.
For normal operation of the mechanism it is necessary to avoid mechanical damage to the gear parts and maintain a certain temperature regime. Any cracks, chips and overheating will cause the lawnmower/grass trimmer to malfunction and stop, which in turn will require repairs to the gearbox. Regular gear lubrication can significantly reduce the risk of these problems and extend the life of your grass trimmer.
19 thoughts on “Grass trimmer clutch. malfunctions, causes and remedies”
Hello Hello, tell me why the clutch in a gasoline harvester spring breaks Thank you very much
I think the clutch spring broke, the grass trimmer clutch spring often breaks as: 1. Wear on the pads, or maybe the clutch drum (which causes the spring to stretch longer than normal during operation). 2. Uneven wear of the pads on some side (tilting the spring). 3. Worn bushings securing pads (causing the pads to move freely and the spring to skew). 4. Check whether the bolts fixing the pads are tightened and whether the grass trimmer clutch drum is not wobbly. 5. Incorrect installation of the clutch spring. you cannot put a screwdriver in the hole and tighten the spring by trying to put the ear of the spring in the hole in the shoe. It is necessary to remove the pads from the grass trimmer, hook the ends of the spring into the holes in the pads, put the pads in the normal position to each other (in the hands with the spring dressed), then install the assembled pads with the spring on the mower and tighten the mounting (special bolts, preferably new, so they do not unscrew during operation). 6. Incorrect operation of the grass trimmer. The manner of mowing. pressed on the gas, released the gas, pressed the gas, released the gas The result. overheating clutch and spring, which leads to its fragility and early wear and tear clutch trimmer for grass. Try to keep the engine rpm constant and use the gas pedal button only to correct the rpm with load (depending on how thick the grass is). Hope that helped. The first three points are treated by changing the pads or replacement of the grass trimmer clutch assembly.
Lawn mower repair, clutch replacement /Repair brushcutters replacement clutch.
In this video we will consider one of the massive failure of Chinese-made petrol-powered mowers: humming when working, crunching.
If you do not change it on time, then you will have another problem besides the clutch pads replacement, it will be necessary.
Can you advise, and the clutch pads can somehow return (pads wore off). rivet, glue, and what material to make the overlay. Or where to buy pads with the size of the cross section of the shoe assembly-58mm, axial mezhboltovoe.40mm.
Similar story in its entirety! No place to buy, I have no idea how and what to glue on the pads. I wish, as a last resort, block the clutch and work without it. Kuzmich.
Kuzmich, and buy a clutch in the online store? You enter the words “grass trimmer clutch to buy” into the search box and search online stores for your grass trimmer clutch. If there is no specifically your clutch. please contact (call, write) with a sales consultant or manager online store and they are happy to pick up or order the clutch you need for trimmer grass. If you can’t get help from one store, contact another one.д., until you find the right piece of hardware! The main thing is not to give up! At this point in the web, I think you can even buy an international gallactic station in disassembled form. In addition, the web is cheaper than the landline stores (maybe even a couple of times). And immediately you can find out the methods and price of delivery (also not cheap). Disadvantages of buying in an online store. is that the product before buying can not touch / smell and need to wait for the ordered product a number of days, and if from abroad, then expect to have from 2 weeks to 2 months. How to return the clutch for a grass trimmer I will try to figure out lately and will post here.
You can glue several layers of kapron stockings (tights) by the method of clamping and heating. Heating over a stove burner. Control of the heating by the melt output from the joints. Valery. Furrores!
How to Repair Grass Trimmer Clutch Pads
If you can not buy a trimmer clutch for grass, or if suitable parts are not on sale, or if it is not cheap, or there is no time to wait for ordered parts, or you just like to repair trimmer with their own hands, then the lining on the clutch pads trimmer for grass can be returned without assistance from others. The same applies to brush cutters, gasoline cutters, brush cutters, power cutters, chainsaws, chain saws and any other equipment with a centrifugal clutch.
This actually requires the lining on the clutch trimmer for grass (to prepare without assistance from others) and get a special adhesive that can withstand severe overheating and high loads, transmitting torque from the motor to the cutting unit. It is also necessary to check whether there is no mechanical wear of bolts and iron parts of grass trimmer clutch pads or chainsaw clutch (look, it may be time to change the grass trimmer clutch assembly).
What and how to make linings for grass trimmer clutch pads (or chainsaw clutch).
For linings on the clutch pads trimmer for grass can use the lining of the rear drum brake though any foreign cars or bikes, which (the lining) comes asbestos, graphite, duralumin and brass dust (not chips).
To give the brake pad necessary curvature, you must on the edges of this bookmark to drill 2 holes (if not there), to connect the ends of the pad with a wire, pull this wire (to start tightening the ends of the pad), putting an iron thumbturn through the wire (you can suitable nail) and turning it, twist the wire and, in this manner, tightening the ends of the gasket.
When the wire tighten (without fanaticism, so as not to break the overlay), drop it into a suitable pot or bucket with water, bring it to a boil and cook for 5-10 minutes. Then we take out the overlay, still tighten the ends of the pad, twisting a collar wire and turn over, and again cook for about 5-10 minutes. We do the same until the lining takes the curvature that is similar to the curvature (radius) of the clutch shoes trimmer for grass (or chain saw clutch, if we do it for that one).
When, after one more pulling out of the boiling water and comparing the auto brake pad with the grass trimmer clutch pad, we have made sure that the pad has taken the radius of the clutch pad, we leave this still wire-stitched pad to dry until tomorrow.
Then we take the wire off the pad, take the dimensions of the future pads from the pad, and from the car brake pad we cut the pads on the clutch pads of our grass trimmer. Grind the edges on the emery, so that the new pads exactly match the size of the clutch pads. That’s it, we already have the grass trimmer clutch linings. Now you need to glue them on the clutch pads of the grass trimmer (lawnmower, brushcutter, electric mower, chainsaw).
How to glue on the grass trimmer clutch pads (or on the chainsaw clutch pads).
We take glue BF-2. It is a copper high-temperature glue with a working temperature up to 200 ° C (BF-6 is not suitable. it can only withstand temperatures up to 90 ° C).
Put glue on both parts. completely cleaned and degreased surface of the clutch plate of the grass trimmer and the contact (inner) surface of the clutch plate. Let them sit in the air for about 30 minutes. Then repeat this operation 1 more time (spread glue on both parts and let them sit for 30 minutes).
Lubricate with glue for the 3rd time, press the linings to the pads with clamps with a semicircular clip on the shape of the pad, so that the pressure was uniform across the surface of the pad (or you can press the liner to the pad, very and moderately wrap them with a suitable wire).
Put it all in the electronic (not gas) oven!) in an oven heated to 200 230°C for 40 min.
Take it out of the oven and let it cool to room temperature without taking it apart.
After the parts have cooled down, remove the fasteners and check if the pads are glued to the grass trimmer clutch pads. Then use an emery cloth to adjust the thickness of the new pads to a proper size (so that the clutch shoes with the new pads will fit in the clutch drum) and roughen the edges and roughness. After that, we assemble the grass trimmer clutch, check the scythe in operation, and satisfied run to talk to a friend.
Note: if the glue is in the form of sheets of about 1mm thick, coated on two sides with a film (so as not to stick together). Cut off a piece of this glue to match the size of the pads. Then dip it in acetone for a few seconds, put it on a previously perfectly cleaned pad, top it up with the overlay. Press the pad to the block with a clamp and put it all in the oven for 15-20 minutes. All. Glued for life.
How to remove the clutch on a trimmer / how to remove the clutch on a chain saw
- What to remove the clutch on the trimmer (remove the clutch on benzokosa similarly), you must first remove the muffler cover, iron stand, starter cover and cylinder cover, so they do not interfere with removal of the clutch cover trimmer for grass.
- We remove the shock absorber cover (by removing the two side screws), release the bolt that tightens the shock absorber and take the tube out of the shock absorber.
- Unscrew 3 or 4 bolts and remove the clutch cover.
- Check the clutch shoes and drum for wear, check if the spring is not broken, check the bearing.
- What to change, for example, pads (weights) clutch grass trimmer, you need to remove the clutch spring, and then unscrew the bolts-axes on the pads (if necessary, locking the crankshaft earlier, shoving a rope into the plug hole, when the piston is in the NFT).
During grass trimmer works at idle rpm, clutch blocks, though rotate together with the crankshaft, but do not touch the clutch drum, because it is compressed by a spring and does not transmit torque from the engine to the cutting equipment. When the engine is running above idle speed (above 4,000 rpm) the clutch weights open due to the centrifugal force (against the spring force) and the inner surface of the clutch drum becomes torsionally engaged with their outer friction surface, thus transferring the torque from the engine to the cutting equipment of the grass trimmer (or lawnmower).
How to use?
Before you start your saw, there are a few tasks to perform:
- Read the instruction manual.
- Reassemble the saw unit according to the manufacturer’s recommendations.
- Fill the automatic lubrication compartment with oil.
- Run-in the engine.
Trimmer clutch Working principles Variety Maintenance
The chain saw manufacturer recommends wearing protective clothing and ear protectors. It is also forbidden to use the saw if you feel unwell, after taking medicines or alcohol. Do not operate in humid conditions.
Note! When the engine is running, there is noise above 100 dB, which is dangerous to the human ear. Movement coordination disorders, white spots and hearing impairment can occur with prolonged operation. To avoid these consequences, it is recommended to use special headphones.
When refueling or topping up, chain saw engine must be stopped. Handle fuel with care, it ignites easily.
Champion 241 chain saw
Typical malfunctions of gasoline group trimmers
The design of gasoline trimmers is more complex than electric, so they have more failures.
If there is no spark when starting the engine, or there is a spark, but weak and insufficient to ignite the fuel, it indicates a malfunction in the ignition system. To eliminate it, check the magneto. Sometimes the high voltage wire has to be replaced if it is broken or the contacts have to be cleaned. It is also possible that a spark plug boot may be defective. In some cases, the problem occurs if the mixture floods the spark plug, or there is soot on it. On cheap Chinese chain saws, the motor sometimes won’t start because the circuit breaker is broken.
Often the problem is not in the parts themselves, but in the not set clearance between the ignition coil and the flywheel magnets. In this case it is necessary to make an adjustment. If this procedure is not performed, early or late combustion occurs.
Important! As a result of not following the recommendations for adjustment, the engine runs on low power or does not run at all, breaks the starter, breaks the cord, etc.д.
When diagnosing the fuel system, first check the presence of the combustible mixture in the tank, as well as its quality. It is made according to the owner’s manual. Do not change the proportions. It is also not advisable to make a mixture with a reserve. during storage it changes its properties and later causes damage to equipment.
First you need to change the mixture in the gas tank and restart the engine. One of the signs of poor quality fuel and lubricants. the grass trimmer does not shift speed and cannot pick up speed, and also throttles, no matter how it was started. when cold or after warming up.
If the device does not start well again, you need to inspect the spark plug duct. It is possible that a combustible mixture got into it. This happens due to improper use of the tool: when starting, the air damper is set in the off position, but after starting the motor is not transferred to the on position, which causes the engine to stall. The next time you try to start the engine, the spark plug gets covered with fuel, after which starting the device becomes impossible. To fix the problem, unscrew the part and thoroughly dry it, as only a dry spark plug can be installed. It is also necessary to drain the fuel from the spark plug channel, remove the carbon deposits from the electrodes of plugs and correctly set the gap between them when installing.
The air filter is another possible cause of grass trimmer failure. if it is clogged with junk, no air gets into the combustion chamber and the fuel cannot be ignited. The part is replaced or thoroughly washed and dried. If oil is found in the air filter, it is washed with gasoline and dried for several hours.
The fuel filter also needs to be checked. It cleans debris from the fuel mixture. A clog results in no petrol flowing into the cylinder and the weed trimmer shuts down. You need to remove and clean the fuel filter and replace it with a new one if necessary.
The breather valve is a check valve that helps equalize the pressure in the tank. If it is clogged, a vacuum is formed in the fuel reservoir, and no fuel flows into the carburetor. Check this by removing the hose from the tank to the carburetor. If gasoline does not come out. the valve is clogged. The breather plug is located on the gas tank lid, sometimes on the fuel tank. The part needs to be disassembled and thoroughly cleaned.
It is caused by poor-quality fuel, dirt and deformed air filter. Parts such as the diaphragms, inlet needle, seat, strainer, adjustment lever, sliders, etc., can get clogged or broken.д. Diagnostics of the device and subsequent cleaning or repair is necessary. In some cases, carburetor adjustments are required.
If the lawnmower stops when the user presses the gas and increases the engine speed, it may indicate a clogged exhaust system. The lawn mower is not very hot and has many defects in its operation due to the presence of clogged particles of counterfeit filter. To correct the problem, the muffler and related parts must be cleaned.
Important! The only way to avoid recurrence of breakdowns is to correctly observe the proportions of oil and gasoline in the preparation of the fuel mixture.
The purpose of the starter. to help start the lawnmower engine. The main malfunctions of this unit are: breakage of a cord and breakage or loss of catch of a spring. To fix the failure, the starter is disassembled, the cord is replaced with a new one, and the spring is returned to its place or, if it is damaged, another is installed.
When diagnosing the piston group, you must first check the compression. If it’s not the right mixture, the engine won’t start. Normally it should be over 8kg/cm2.
As a side note! On some engines there is no idle, so at 8kg/cm2 they stall, because the fuel mixture is not pumped. So, if the lawnmower does not pump above the recommended value, you need to check the piston, cylinder and rings.
Another possible cause of low compression is a poorly fixed carburetor. If gasoline drips during operation, it also tells you that you need to tighten the attachment of this unit.
One of the possible cutting blade failures is a dislocated or stuck cassette cover. This is caused by misalignment of the axle or unsuitable mowing heads. This makes it difficult to rotate, increases the load on the motor, and causes it to overheat.
If the cutter bar does not rotate, check the assembly. For a curved shape, you need to inspect the bushing and the rod itself, and for a straight shape, the shaft, gearbox and clutch. All connections between components must be intact. Check only if the grass trimmer motor is serviceable. Sometimes there is confusion and users think that there is a problem with the cutting assembly but in fact the motor is defective.
About the holes
The overlays need holes for attachment. They must be made strictly according to the drawing of the company assembling the clutch assembly.
Holes are of two types: under rivets, with a recessed area (zaplechik) for the flat, and technological, to work with rivets opposite pad.
However, linings factories make them with and without holes. The fact is that many customers, automotive and engine plants, want to do this operation themselves.
Holes can be made in three ways: embedded in a mold design, punched with a special die, or drilled. It is clear that the liner manufacturer can use any of the above methods, while the customer (automobile plant or engine plant) may use only the second or third.
Most companies use multi-position machines to drill holes. This method provides excellent accuracy, but the trouble is that the thread is cut during drilling, reducing the strength of the overlay. That’s why the leading factories use holemaking technology in the liner pressing stage.
It goes without saying that the thread remains intact. But that’s not all: this technology allows you to reduce the thickness of the shoulders and increase the life of the product until the rivets make contact with the pressure plate or flywheel.
And this is a ready thread with impregnation, received on a winding machine
The table rotates and a ring is formed on it. the future overlay
The rod throws the thread through the arc of an ellipse, from the inner circle to the outer. The result is an ellipsoidal overlay
And here is the semi-finished product. a pad twisted from a thread
Repair of lawn mower clutch with his own hands clutch
Details: lawn mower clutch repair with his own hands clutch from the real master for the site olenord.com.
Described malfunctions of grass trimmer clutch and lawn mower clutch, also how to remove the clutch on a trimmer and how to remove the clutch on a gasoline mower.
1) Grass trimmer clutch malfunction: At idle rpm the blade spins almost always, you can hear extraneous noises in the front of the motor, but the grass trimmer mows normally.
The clutch of the lawnmower is the same as the grass trimmer.
Causes of the problem: The grass trimmer clutch spring has burst (lawnmower clutch spring burst).
Grass trimmer repair with your own hands: Replace a broken clutch spring with a new one (see details below). How to remove the clutch on a trimmer). Or, if only a hook from the edge broke off on the spring, you can heat the spring with a torch, bend one ring to get a new hook and harden the spring (such a clutch spring can work even a few years).
Hands-on lawn trimmer repair is similar to grass trimmer repair.
2) Trouble with grass trimmer: grass trimmer clutch often slips, sometimes the clutch spring breaks.
Causes of the problem: Worn grass trimmer clutch pads (lawn trimmer clutch pads).
Repair of chainsaws with their own hands: Replace the clutch pads of grass trimmer (for details, see “Grass Trimmer Clutch”). below How to remove the clutch on a trimmer).
Hand lawn mower repair is the same as grass trimmer repair.
- To remove the clutch on the trimmer (removal of the clutch on the benzokosa similarly), you must first remove the muffler cover, metal stand, starter cover and cylinder cover, so that they do not interfere with the grass trimmer clutch cover removal.
- Remove the shock-absorber cover (by unscrewing two side screws), release the bolt that tightens the shock-absorber and take the tube off the shock-absorber.
- Unscrew 3 or 4 bolts and remove the clutch cover.
- We estimate the wear of the shoes and the clutch drum, check if the spring is not broken, examine the bearing.
- To replace e.g. grass trimmer clutch shoes (weights), you need to remove the clutch spring and then unscrew the axle bolts on the shoes (if necessary, pre-tighten the crankshaft by shoving a rope into the spark plug hole when the piston is in the NFT).
When the grass trimmer is idling, the clutch pads do not touch the clutch drum because they are compressed by the spring and do not transmit torque from the motor to the cutting equipment.
When the engine is running above idle rpm (above 4,000 rpm), the clutch weights expand under the action of centrifugal force (overcoming the spring force) and catching their outer friction surface on the inner surface of the clutch drum, begin to rotate it, thus transferring torque from the engine to the cutting equipment of the grass trimmer (or lawnmower).
Hello Hello, tell me why the clutch in the gasoline harvester spring rips Thank you very much
I think the clutch spring broke, the grass trimmer clutch spring often breaks because:
Wear on the pads, or maybe the clutch drum (which causes the spring to stretch longer than normal during operation).
Uneven wear of the pads on one side (tilting of the spring).
Wear of the bushings securing the pads (causing play in the pads and distortion of the spring).
Check if the shoe bolts are tight and if the grass trimmer clutch drum is wobbly.
Improper installation of the clutch spring, you can not put a screwdriver in the hole, tighten the spring, trying to put the spring ear into the hole in the shoe. It is necessary to remove the pads from the grass cutter, hook the ends of the spring into the holes in the pads, put the pads in the normal position against each other (in your hands with the spring on), then install the assembled pads with the spring on the mower and tighten the fasteners (special bolts, preferably new, so they do not unscrew during work).
Improper use of the trimmer for grass. Push the gas, release the gas, push the gas, release the gas As a result the clutch and the spring overheat, which leads to its fragility and premature wear of the grass trimmer clutch. Try to keep the same engine rpm during mowing and only correct the rpm with gas pedal button depending on the load (depending on how thick the grass is).
I hope it helped. The first three points are treated by changing the pads or replace the clutch trimmer for grass in the assembly.
Can you advise, and clutch pads can how to restore (lining wiped out). To rivet, glue, and what material to make the liner. Or where to buy pads with the size of the diameter of the pads in the assembly-58mm, axial mezhboltovoe.40mm.
The same story is absolutely! Buy nowhere, but how and what to glue on the pads of mind do not come to mind. As a last resort, I want to lock the clutch and work without it. Kuzmich.
Kuzmich, and buy a clutch in an online store? Enter the words grass trimmer clutch into the search box and search online stores for your grass trimmer clutch. If you do not have your clutch, please contact (call, write) with a sales consultant or manager online store and they are happy to pick up or order the clutch you need for grass trimmer. If you can not help in one store, talk to another, and so on.д., Until you find the right iron! The main thing is not to give up!
Now on the Internet, I think you can buy even an international space station in disassembled form. Also, it’s cheaper on the Internet than in the surface stores (maybe even several times cheaper). And immediately you can find out how and the cost of delivery (also not expensive). The disadvantages of buying in the online store is that the product can’t be touched / smelled before buying and it is necessary to wait for ordered goods for a few days, and if you come from abroad, then you have to wait from two weeks to two months.