Hint: Use a 625RR not 625ZZ at the brush end as the dust from the brushes contaminates the bearings. Also if you cut a washer from the lid of a Chinese Takeaway Food container 13.5 mm OD and 4.5mm ID and place this between the brushes and the bearing, and use commutator lubricant or lanolin. The motor shaft slips which ends up with the brown compressor fan inside hitting the plate, or the Black fan hitting the sensor package. When the motor slows it creates a rich burn, more Carbon Monoxide , more fuel used for the heat setting, and Smokey star up and shutdown, and deposits in the heater. So when you pull the motor apart superglue it in the correct place .
Massive thanks for doing this video! My heater is 6 months old and this issue showed up. I would not have done this if it weren’t for you. Thanks again!
Those look to be the same bearing size used in skateboard wheels. When I took my Total Gym apart, the rollers also had the same bearings as skateboard wheels, with a good ABEC rating too. Your local skateboard shop may be a good source for "buy it now" replacement bearings ranging from ABEC 3 (poor) to Swiss precision or even ceramic. For quality bearings, you'll probably have to buy the full set of 8 though.
@@12volthighpeakvanlife.62 no problem, I like to help, & I love to fix things, especially with skateboard parts. I hope it works out for you & you find that you already have some. I think the ones I took off my "total gym" were German ABEC 7's. Surprisingly good quality. The higher the ABEC rating, the rounder the balls are, the smoother the "ride", the less vibration, and the less the noise should be. I've never tried them, but I think Powell makes "6 ball" bearings, so there's less friction and more speed for skateboarding. That concept may work well for noise reduction in this application.....if they are in fact the same size as skateboard bearings.
625 an 608 are different size. As for skate bearing and misuse of ABEC, not much point. 99% of china made skate bearings are the same regardless if 1, 2, 5 or 7 are stamped on the sheild. Marketing hype. If you want to spend, get Bones Swiss, pretty much the only 608 made in Europe at the WIB factory in Switzerland. ABEC in the bearing industry is really used anymore. Pretty much everything is made within (or not) tollerances :-) EZO also make bearing in China :-) But probably under strict supervision and to EMQ standard (Electro motor quality)
@@LarryMorrow2 Back in the day, GMN was germany produced bearings. Good stuff. Today,, apart fraom Bones swiss, all made in China. Nothing wrong with them, good enough. Have Swiss on my verk board and Zealous ($13) on my downhill setups. Beem 71mph on them, Bearing dont really matter :-)
Thank you for putting the part numbers in the description. I found them locally. And, that heater in your video is the exact same as mine. Looking forward to a much quieter heater. Mine is making a lot more noise than yours.
Adventure Brad bought the 5 Kw model. The fuel pump promptly failed and he replaced it. I'm sorry to know about the low quality of some of the components, but glad to know that replacements are to be found.
My experience over the past three years with them has been a neat learning exercise. My advice is have a secondary / backup heater such as an electric space heater and buy 150% diesel heaters: planning on running one then buy two, planning on two then buy three… have an extra ready to go and keep all the good parts when one fails. Depending on what fails you can then order that and rebuild it to have as your next replacement. Some parts are close to cost of a whole new heater but even then they’re not terribly expensive.
@@fadingveilI recorded a video of the whole process. I'll try to edit and post it soon here on TH-cam. It's been two months and the new bearings are still really quiet and I run it 24/7. You got to pull on the fan wheels pretty hard to get them off the shaft.
@@fadingveil The internal fan blade is the trickiest part, they’re normally pressed on pretty tight but be careful because they’re brittle and will break easily.
The leftover buzz just sounds like the motor brushes, the more it's used, the quieter that'll get as the carbon brushes bed themselves in, so win-win there... :)
Just left a comment on your 1st teardown video. I recognized the bad bearing sound from a cheap brushless rc plane motor I got from china. Sounded nearly identical the old bearings in this. But the noise sounded kind of neat in the plane anyways so I left them alone. It would be very annoying if you were trying to work or sleep next to it though.
great video, also helpful how you show it is even quieter when you lift it up, make me think when i install one i will use some kind of rubber grommet where i screw in the attachments to the vehicle to help create a vibration transfer barrier. .
@@faffybubs9099 Hi. The photo is on my smartphone. The clearance of the burner fan seems to be about 1.5mm to 2mm. The fan was press-fitted into the shaft, so be careful when attaching and detaching. thx：）
@@byates59 Please post a video or do a write-up if you discover a way to disassemble the motor without damaging the two fans, as was done in this video.
Hi. Thank you for you spend the time deep analyze this item. Typically to the chinese manufacturers, they save one tiny parts from the unit. In this case the ball-bearings. I think the electric motor with the ball-bearings running on never ending. :-)
I did it followed your video" the motor get magnet dust in it and in the bearings" thats the motor noise, be careful to put the stater back in right, and dont lose the rubber cap that goes over the bearing and in the slot as a vibration damper, you'll have to adjust the outer fan so it's not too close to the pickups and the Brain box. with a flathead and behind the fan to pry it out those couple millimeters and it should run silent.
i got a pair of bearings from RS part number 618-9878 that is for a 2kw and they are very smooth. that is if you are stuck while waiting for your japanese bearings.
What size bearings are they do you know? I have a course sound not a vibration. Are all the motors able to be disassembled like that or some compete pressed units?
Just curious. Why not use rubber sealed bearings? Since fresh air coming, then motor, fan blowing hot air out from the front. Motor or bearing dont get hot - I think.
On to something Stopping the tick from the fuel pump? I suspend my pump using cable ties to stop the tick from transferring in to whatever it’s fixed it.
By means of comparison, the ticking on my Erbespacher dose pump is freakisly loud, and the outside spent air outlet is so loud that I would not run it at night in a residential area
Tony Ling we’ve used a silencer on the exhaust and as I mentioned, we used a simple screw loop and four cable ties. Two around the pump and two through the screw loop to suspend it in mid air to stop the put transferring its noise.
I’m wondering if it’s OK if to remove the fan shroud and have a secondary fan pulling air over the heat chamber so you’re having max airflow all the time rather than letting the diesel heater adjust the fan speed so you’re having the maximum airflow all the time? Or will that affect things and make it so it doesn’t run right?
that is cheaper than that stupid replacement DC motor I linked in a video yesterday. I was impressed that the Chinese Rotor was balanced in the first place. (ground out spots on the side of it). I use to work for a company that built robot assemble lines which made them. Have to wonder if that was made from an assembly line I made.
I've had mine since August 2019 it's been used more or less daily and flat out all night thru the winters but recently its start making terrible rattling noises, would it be worn bearings ? Cheers
@@JoelPit I've got the bearings already, but I don't wanna open it up yet coz we need heating and I don't wanna fuck it up, it's a shame he didn't show how he got the old bearings out and the new ones in, good luck with your one 👍
These are the ones I bought - www.ebay.co.uk/itm/Bearing-625-ZZ-625zz-625Z-625z-dimension-5x16x5-EZO-JAPAN-fast-free-shipping/272402202007?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Hi Thank you they are the same size as my sons skateboard bearings go on ebay you can get then for £1.30 free post for 5 next time you want then. On the bearings I put some ZX1 lub and they last a long time. Jeff@@DavidMcLuckie
So, If anybody's paying attention. Is it the same bearing for the 2.5 and 5kw? Because I need to replace the motor now, because of the bearing. And I might as well just get new bearings. And does anybody have a new link url for a couple of?
also iv bought a few of ebay & noticed my exorst are 3mm bigger even with paste its messy .people are tighting the jubilee clip on some which inturn buckles causing gaps and blows up onto the bottom of the heater after installing.
I have the same problem with my 5kw diesel heater, I was able to get the combustion air fan blade off but I am having trouble with the black return air fan blade, how did you get it off? Thanks for the video!
Hi David, your bugbear with the 8kW heater seemed to big sluggish buttons, is there any benefit of seeing if they can be improved? I guess it's poor contact design but could be software 🤔
Another commenter said that it's the slow refresh of the controller. As when you press it, wait, press it again, it works every time. It's just slow. :(
David that's a great result. So are you going to put the LCD controller from the 8kw one onto the smaller one and see how little you can get the consumption down too?
Fantastic what a difference! Also as its a "new" motor the brushes could be a little clicky until they bed in properly....in the rc days we would run a ball point pen up and down the com segments and run a motor in over night on a couple of cells...some even did this with the motor submersed in a glass of water! Keep up the great work!:-)
PCM? or PWM? Yes there is some tone from the pwm used for voltage control, but its a lot higher than the noise of a bad bearing but good observation.:-)
@@jbsmith1 It is made very profound when using a radio control DC motor with an H bridge. When you furst initialise the controller, it can play a tune on the motor (DC or 3 phase) without it even visibly rotating.
my 8kw was fine for the first few months and now it's quiet then vibrates for a few seconds then back to normal for a good while then a vibrate. and that carrys on. are these motor bearings the only bearing inside the entire unit? mines an all in one so havnt took it out to disassemble yet. its hardly soot after only a few months. with my ear to the unit it sounds about midway to forward the noise is
@@DavidMcLuckie do the fan and turbine wheel go back on nice and tight after being removed ? I might let it hum away till spring then do the bearings. it's heating my room so don't want any down time. if I was sure the bearings are the same size in my 8kw id get them and I'd get it done and back going. thanks
I'm not 100% sure as I haven't had to go that deep into a 5KW (yet). I think the motor is the same between the two sizes of heater as I only see a listing for one motor but 12V or 24V.
@@DavidMcLuckie Thank you very much for the response. What you say makes perfect sense, it so obvious when you say it. Thank you for taking the time to respond.
These are the ones I bought - www.ebay.co.uk/itm/Bearing-625-ZZ-625zz-625Z-625z-dimension-5x16x5-EZO-JAPAN-fast-free-shipping/273795220952?hash=item3fbf7785d8:g:-OIAAOSwux5YPr0O
Carefully, very carefully. More precisely with several levers and plastic trim tools slowing pushing it off. Would be easier to just buy a new fan and break that one off.
@@irish-simon Ah, ok. That actually makes sense especially since the bearings will be heating up. I wonder how much they actually heat up since they are shielded from a lot of the heat behind the plastic combustion chamber fan wheel. Would the extra clearance cause them to be noisier if the heat expansion didn't close the gap?
Well I don’t know the exact number on these things, but if there is enough space to add ball bearings into the casing, it’s short. Every high end bearing case I’ve ever disassembled(skateboard, bicycle, wheelchair, motorcycle) has had enough bearings to fill the entire void. The all have slack in the case, but all had enough balls that you couldn’t fit another into the casing. I have ran across cheap bearings that were missing a ball or two, they were all crap.
David McLuckie if you have high revolution bearings that are the same size, with differing numbers of actual balls inside, or not enough balls, it’s going to cause a vibrational problem.
Why would you go through all the trouble to replace bearing when you can order the entire motoer assemble c/ bearings and housing for like $40 ?? I did. Repair time is like 15 mins.
@@DavidMcLuckie…. great answer! The real value in doing it is that in 5 or 10 years you may not be able to get these replacement parts and bearing swaps may be the only option. Everything we buy eventually gets to an age where replacing parts isn’t possible..
Does anyone know were i can get set brushes for 8 kw motor FULI 12v 202210130016 please let me know Amazon sending me complete motor gaskets and mounting gasket when ever it gets to me around xmas time its been ordered week ago.
Hint: Use a 625RR not 625ZZ at the brush end as the dust from the brushes contaminates the bearings. Also if you cut a washer from the lid of a Chinese Takeaway Food container 13.5 mm OD and 4.5mm ID and place this between the brushes and the bearing, and use commutator lubricant or lanolin. The motor shaft slips which ends up with the brown compressor fan inside hitting the plate, or the Black fan hitting the sensor package. When the motor slows it creates a rich burn, more Carbon Monoxide , more fuel used for the heat setting, and Smokey star up and shutdown, and deposits in the heater. So when you pull the motor apart superglue it in the correct place .
You need to make a video on that. Elaborate.
i was going to say the same thing @@krimke881
Massive thanks for doing this video! My heater is 6 months old and this issue showed up. I would not have done this if it weren’t for you. Thanks again!
That's very impressive. What a difference for ten quid and some effort
My heater is starting to squeak once in a while when idling, I think I'm going to do this to mine. Thanks for the video 👍
Repairing whatever slipped past Chinese 'quality control' is always incredibly satisfying imo
I think their QC might have been simply to test if the motor runs. :)
Be fair, you are not paying a lot of this thing.
'Slipped past' ? No, those original bearings were chosen because they were the quietest in the batch! 😁
@@nexpro6985 Yeah quietest in the batch of rejects from the other company they were made for originally.
Thank you so much for including the bearing size in your description :)
Those look to be the same bearing size used in skateboard wheels. When I took my Total Gym apart, the rollers also had the same bearings as skateboard wheels, with a good ABEC rating too.
Your local skateboard shop may be a good source for "buy it now" replacement bearings ranging from ABEC 3 (poor) to Swiss precision or even ceramic.
For quality bearings, you'll probably have to buy the full set of 8 though.
@@12volthighpeakvanlife.62 no problem, I like to help, & I love to fix things, especially with skateboard parts.
I hope it works out for you & you find that you already have some.
I think the ones I took off my "total gym" were German ABEC 7's. Surprisingly good quality. The higher the ABEC rating, the rounder the balls are, the smoother the "ride", the less vibration, and the less the noise should be.
I've never tried them, but I think Powell makes "6 ball" bearings, so there's less friction and more speed for skateboarding. That concept may work well for noise reduction in this application.....if they are in fact the same size as skateboard bearings.
625 an 608 are different size.
As for skate bearing and misuse of ABEC, not much point. 99% of china made skate bearings are the same regardless if 1, 2, 5 or 7 are stamped on the sheild. Marketing hype. If you want to spend, get Bones Swiss, pretty much the only 608 made in Europe at the WIB factory in Switzerland.
ABEC in the bearing industry is really used anymore. Pretty much everything is made within (or not) tollerances :-)
EZO also make bearing in China :-) But probably under strict supervision and to EMQ standard (Electro motor quality)
@@no66 I was under the impression that the GMN stamped on the shield stood for German.
I love Bones Swiss. I've been riding them for years.
@@LarryMorrow2 Back in the day, GMN was germany produced bearings. Good stuff. Today,, apart fraom Bones swiss, all made in China. Nothing wrong with them, good enough. Have Swiss on my verk board and Zealous ($13) on my downhill setups. Beem 71mph on them, Bearing dont really matter :-)
Thank you for putting the part numbers in the description. I found them locally. And, that heater in your video is the exact same as mine. Looking forward to a much quieter heater. Mine is making a lot more noise than yours.
what model you got? from amazon? looking to gwt same one.
Adventure Brad bought the 5 Kw model. The fuel pump promptly failed and he replaced it. I'm sorry to know about the low quality of some of the components, but glad to know that replacements are to be found.
My experience over the past three years with them has been a neat learning exercise. My advice is have a secondary / backup heater such as an electric space heater and buy 150% diesel heaters: planning on running one then buy two, planning on two then buy three… have an extra ready to go and keep all the good parts when one fails. Depending on what fails you can then order that and rebuild it to have as your next replacement. Some parts are close to cost of a whole new heater but even then they’re not terribly expensive.
Mine is SO loud right now. I just ordered two genuine EZO 625-ZZ bearings on eBay. 5x16x5mm I'm sure it will make a big difference. Thanks!!
How did it go? Was it easy to disassembly and change the bearings?
@@fadingveilI recorded a video of the whole process. I'll try to edit and post it soon here on TH-cam. It's been two months and the new bearings are still really quiet and I run it 24/7. You got to pull on the fan wheels pretty hard to get them off the shaft.
@@fadingveil The internal fan blade is the trickiest part, they’re normally pressed on pretty tight but be careful because they’re brittle and will break easily.
The leftover buzz just sounds like the motor brushes, the more it's used, the quieter that'll get as the carbon brushes bed themselves in, so win-win there... :)
Do you have a part number and a supply source for the bearings? Many thanks!
Just search: 5x16x5mm bearing. The rubber sealed should last longer than the shielded which lets dust from the brushes in.
F625ZZ Ezo us
@@Scott_Free Will the rubber seals hold up to the heat?
Quite a difference. even seems like less vibration. great video!
Just left a comment on your 1st teardown video. I recognized the bad bearing sound from a cheap brushless rc plane motor I got from china. Sounded nearly identical the old bearings in this. But the noise sounded kind of neat in the plane anyways so I left them alone. It would be very annoying if you were trying to work or sleep next to it though.
great video, also helpful how you show it is even quieter when you lift it up, make me think when i install one i will use some kind of rubber grommet where i screw in the attachments to the vehicle to help create a vibration transfer barrier. .
Inspired by your video, I was able to replace the bearings. My 2kW heater is also very quiet. Thank you.
is there a set clearence for burner fan thanks
@@faffybubs9099
Hi.
The photo is on my smartphone.
The clearance of the burner fan seems to be about 1.5mm to 2mm.
The fan was press-fitted into the shaft, so be careful when attaching and detaching.
thx：）
thank you it purring now my frind
Good one Dave. Much improved.
Yeah I talk to inanimate objects also - usually the oven timer - stop beeping I'm coming
He said they're "EZO 16x5x5mm 625Z".
THAAAAANKS A THOUSAND! 😁
I have a 5kw heater with the same problem, I wonder if it uses the same bearings?
@balls up ... Yeah, I already purchased a pair! Thanks!
@@byates59 Please post a video or do a write-up if you discover a way to disassemble the motor without damaging the two fans, as was done in this video.
Hi. Thank you for you spend the time deep analyze this item. Typically to the chinese manufacturers, they save one tiny parts from the unit. In this case the ball-bearings. I think the electric motor with the ball-bearings running on never ending. :-)
Japanese bearings are a no-brainer. I use them in my serpentine belt pulley and they still work flawlessly and are extremely quiet
I did it followed your video" the motor get magnet dust in it and in the bearings" thats the motor noise, be careful to put the stater back in right, and dont lose the rubber cap that goes over the bearing and in the slot as a vibration damper, you'll have to adjust the outer fan so it's not too close to the pickups and the Brain box. with a flathead and behind the fan to pry it out those couple millimeters and it should run silent.
is there a clearence for burner fan
i got a pair of bearings from RS part number 618-9878 that is for a 2kw and they are very smooth. that is if you are stuck while waiting for your japanese bearings.
Hello! Is it any video explaining how to disassemble the fan motor to change the bearings? Thanks!
No reply from this soul.
608ZZ skateboard bearings are 8mm ID 21 OD and 7 Width these heater bearings are 625ZZ 16mm OD 5mm ID and 5 mm Width,
Yes the armature and staiter are off where the magnetic feild attracts due to the the end flange caps are we bit off
Did you put the fan blades on in the same clocked orientation on the motor shaft, or clicked to each other to maintain balance?
skate boards use the same size bearings along with air tools fan motors i buy them in bulk like 20$ for 100
I was going to say...looks exactly like skateboard wheel bearings
Your a bloody genius super dave
What size bearings are they do you know? I have a course sound not a vibration. Are all the motors able to be disassembled like that or some compete pressed units?
5x16x5mm bearing size - 625Z or 625ZZ
Just curious.
Why not use rubber sealed bearings?
Since fresh air coming, then motor, fan blowing hot air out from the front.
Motor or bearing dont get hot - I think.
On to something
Stopping the tick from the fuel pump?
I suspend my pump using cable ties to stop the tick from transferring in to whatever it’s fixed it.
By means of comparison, the ticking on my Erbespacher dose pump is freakisly loud, and the outside spent air outlet is so loud that I would not run it at night in a residential area
Tony Ling we’ve used a silencer on the exhaust and as I mentioned, we used a simple screw loop and four cable ties. Two around the pump and two through the screw loop to suspend it in mid air to stop the put transferring its noise.
Yes it does work I agree with that simple and easy to do.@@Curbsidecrafters
Jeff Mee 👍🏼
Game changer.
Thank you, David.
You can get a cell phone ap. to measure the sound levels. Iphone ap. called NIOSH Sound Level Meter. Works well.
at 3:00 you could hear its much much better. The original vibrated
Its the shaft off balance just a wee bit won't make any difference what bearing you put in it won't last lol brilliant videos watched most keep it up
Was indeed the bearings. Have them on my desk and can feel the rough spot on one of them.
Great video David, cheers!
Do they have an upgraded motor with the good bearings in them already
it sure made a difference Do you have a part number and a supply source for the bearings?.....thanks!
12
Can u please tell me how you removed the motor from the assembly and where u purchase it (the replacement motor/bearings)? Thank you!
The hardest part is not breaking the combustion fan during removal. Other than that it's a few screws. I got the bearings on eBay.
Mine has had that annoying sound since I first installed it four months ago.
i am thinking about doing it because my fan has gotten incredbly loud from bearing noise
Can you try full ceramic bearings?
I’m wondering if it’s OK if to remove the fan shroud and have a secondary fan pulling air over the heat chamber so you’re having max airflow all the time rather than letting the diesel heater adjust the fan speed so you’re having the maximum airflow all the time? Or will that affect things and make it so it doesn’t run right?
that is cheaper than that stupid replacement DC motor I linked in a video yesterday.
I was impressed that the Chinese Rotor was balanced in the first place. (ground out spots on the side of it). I use to work for a company that built robot assemble lines which made them. Have to wonder if that was made from an assembly line I made.
Is this the 2kW (small housing), or the 5/8kW (large housing), or does it not matter, since bearings/motors all the same. Do you know?
The motors are different, but the shaft size is the same. I'd expect the bearings to be the same size to save on costs.
I've had mine since August 2019 it's been used more or less daily and flat out all night thru the winters but recently its start making terrible rattling noises, would it be worn bearings ?
Cheers
About the same amount of time on mine same type noise
@@JoelPit
I've got the bearings already, but I don't wanna open it up yet coz we need heating and I don't wanna fuck it up, it's a shame he didn't show how he got the old bearings out and the new ones in, good luck with your one 👍
@strake750 I really should have filmed that. :(
Perfect video, do you have the link for bearings.
These are the ones I bought - www.ebay.co.uk/itm/Bearing-625-ZZ-625zz-625Z-625z-dimension-5x16x5-EZO-JAPAN-fast-free-shipping/272402202007?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Yes David a lot better can you tell us the bearing sizes need some myself I think I might have some thanks. Jeff
16x5x5mm. 625Z is the marking on them.
Hi Thank you they are the same size as my sons skateboard bearings go on ebay you can get then for £1.30 free post for 5 next time you want then. On the bearings I put some ZX1 lub and they last a long time. Jeff@@DavidMcLuckie
@@jeffmee763: I wonder if they were also manufactured in china or japan? just curious. thanks for the info.
To be fair I think they are the same as I can see no difference I just give them a bit of top quality lube. Jeff@@ronwasser4852
So, If anybody's paying attention. Is it the same bearing for the 2.5 and 5kw? Because I need to replace the motor now, because of the bearing. And I might as well just get new bearings. And does anybody have a new link url for a couple of?
I put my diesel pump in homemade cement brick with tiny pebbles, sound proofing
Interesting.
also iv bought a few of ebay & noticed my exorst are 3mm bigger even with paste its messy .people are tighting the jubilee clip on some which inturn buckles causing gaps and blows up onto the bottom of the heater after installing.
I have the same problem with my 5kw diesel heater, I was able to get the combustion air fan blade off but I am having trouble with the black return air fan blade, how did you get it off? Thanks for the video!
Never mind, I was able to get it off! Thanks anyways!
Brute force? :)
Hi there,
You should have tried kerosene fuel also to see how mutch blue and yellow flame, clean or dirty burn, temperature result ?
already done .. check out some other videos
Hi David, your bugbear with the 8kW heater seemed to big sluggish buttons, is there any benefit of seeing if they can be improved? I guess it's poor contact design but could be software 🤔
Another commenter said that it's the slow refresh of the controller. As when you press it, wait, press it again, it works every time. It's just slow. :(
Have you got a cheeky little link to the bearings mate? 😁
www.ebay.co.uk/itm/Bearing-625-ZZ-625zz-625Z-625z-dimension-5x16x5-EZO-JAPAN-fast-free-shipping/273795220952?hash=item3fbf7785d8:g:-OIAAOSwux5YPr0O
David that's a great result. So are you going to put the LCD controller from the 8kw one onto the smaller one and see how little you can get the consumption down too?
We're not overly concerned with consumption. Being warm is a higher priority. :)
Fantastic what a difference! Also as its a "new" motor the brushes could be a little clicky until they bed in properly....in the rc days we would run a ball point pen up and down the com segments and run a motor in over night on a couple of cells...some even did this with the motor submersed in a glass of water! Keep up the great work!:-)
It does sound to me like there is a wee bit of PCM motor driver noise, both before and after
PCM? or PWM? Yes there is some tone from the pwm used for voltage control, but its a lot higher than the noise of a bad bearing but good observation.:-)
@@jbsmith1 It is made very profound when using a radio control DC motor with an H bridge.
When you furst initialise the controller, it can play a tune on the motor (DC or 3 phase) without it even visibly rotating.
yes there are speedo's that take advantage of this when in setup mode and the motor will beep. :-)
Wtf. £5 per bearing. What size? Could have prob got 2 swiss bearings for the price of one. Probably, they most be some weird size.
If you can find a high quality bearing cheaper please post it here. It might help the next guy.
@@DavidMcLuckie will have a look as I'm curious. Can you give me the size? Cheers.
@@lonoreturns size is 5x16x5mm part number is 625-Z, or 625-ZZ C3
What about a nice new RC motor
I've been wondering this myself. Or (less likely) remove the fan and motor and mount a computer fan or two on the outside.
Well done.
my 8kw was fine for the first few months and now it's quiet then vibrates for a few seconds then back to normal for a good while then a vibrate. and that carrys on.
are these motor bearings the only bearing inside the entire unit?
mines an all in one so havnt took it out to disassemble yet. its hardly soot after only a few months. with my ear to the unit it sounds about midway to forward the noise is
The motor bearings are the only ones yes.
@@DavidMcLuckie do the fan and turbine wheel go back on nice and tight after being removed ? I might let it hum away till spring then do the bearings. it's heating my room so don't want any down time. if I was sure the bearings are the same size in my 8kw id get them and I'd get it done and back going. thanks
They do. I'd leave it until you don't need heat. As if you break one of the fans then you're truly fucked.
Power consumption (before and after)?
What size is the bearings do you have a part number
5x16x5mm bearing size - 625Z or 625ZZ
@@DavidMcLuckie thank you god bless
Hello David. My heater is still driving me mad. I got the 5kw one. Are the bearings the same size? I will order them today if that is the case.
I'm not 100% sure as I haven't had to go that deep into a 5KW (yet). I think the motor is the same between the two sizes of heater as I only see a listing for one motor but 12V or 24V.
@@DavidMcLuckie Thank you very much for the response. What you say makes perfect sense, it so obvious when you say it.
Thank you for taking the time to respond.
@@sprinterlex2082 did you try to fix the 5kw bearings? Were they the same size? My 5kw is making all kinds of noise 🥴
@@lexsarrasin713 Bump! I'm curious too!
so much better
How many hrs did you run the heater before the bearings went to shits?
They were fucked from the factory.
Have the same diesel noise, dodgy bearings and not willing to start, cheap as chips 🙈😆
Hi how did you get the fans of the sharft?
They are a press fit. I very carefully prised them off.
@@DavidMcLuckie just tried and broke in to bits lol
Ahh. Thankfully spares are available.
And id put heater in some sort of sound deadening box
You have the product nr or something I can search for to get those bearings. Need this! 😁
These are the ones I bought - www.ebay.co.uk/itm/Bearing-625-ZZ-625zz-625Z-625z-dimension-5x16x5-EZO-JAPAN-fast-free-shipping/273795220952?hash=item3fbf7785d8:g:-OIAAOSwux5YPr0O
I am curious how you removed the internal fan without breaking it.
Carefully, very carefully. More precisely with several levers and plastic trim tools slowing pushing it off. Would be easier to just buy a new fan and break that one off.
@@DavidMcLuckie hi Nate where can I buy the fan turbine from
you should use 625z c3
Why?
@@daan3298 C3 stands for extra clearance very good for motors and the like lasts longer than the normal 625zz
@@irish-simon What part of the bearing has extra clearance? Can you explain this better please?
The balls in the bearing are small to allow for the metal expansion while running
@@irish-simon Ah, ok. That actually makes sense especially since the bearings will be heating up. I wonder how much they actually heat up since they are shielded from a lot of the heat behind the plastic combustion chamber fan wheel. Would the extra clearance cause them to be noisier if the heat expansion didn't close the gap?
Way better id wrap it in thin foam tape as a damper aswell
Could you plese tell me marking and dimension of bearing? THX :-)
16x5x5mm. 625Z is the marking on them.
Is it possible to tune the 5kw to be 2kw?
Probably close to that.
I think the motor needs a proper balance and that could be your problem!!
It was the bearings. Old ones were notchy in places. The new EZO ones cured it.
Job well job'ed
Much Quieter 👍👍
£5 each. I have a bog full of them in my shed,, Lol
No, I have a job lot from Rolls Royce from when they shut down, One cannot get better
Use a Brushless motor ,this type the coil isn't balanced,mystery has been answered 😁😏
The Chinese skip out on parts, I’d bet a dollar to a donut there are less ball bearings in that bearing housing than normal.
How many should there be in a 625Z?
Well I don’t know the exact number on these things, but if there is enough space to add ball bearings into the casing, it’s short. Every high end bearing case I’ve ever disassembled(skateboard, bicycle, wheelchair, motorcycle) has had enough bearings to fill the entire void. The all have slack in the case, but all had enough balls that you couldn’t fit another into the casing. I have ran across cheap bearings that were missing a ball or two, they were all crap.
David McLuckie if you have high revolution bearings that are the same size, with differing numbers of actual balls inside, or not enough balls, it’s going to cause a vibrational problem.
Get some Motor Kote and put a couple drops on them ,it’s amazing stuff. motorkote .com
Why would you go through all the trouble to replace bearing when you can order the entire motoer assemble c/ bearings and housing for like $40 ?? I did. Repair time is like 15 mins.
Because no one else has. I like to play.
@@DavidMcLuckie…. great answer! The real value in doing it is that in 5 or 10 years you may not be able to get these replacement parts and bearing swaps may be the only option. Everything we buy eventually gets to an age where replacing parts isn’t possible..
Does anyone know were i can get set brushes for 8 kw motor FULI 12v 202210130016 please let me know Amazon sending me complete motor gaskets and mounting gasket when ever it gets to me around xmas time its been ordered week ago.
I haven't seen any brushes for the motors. But complete motors are available.