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- เผยแพร่เมื่อ 30 มิ.ย. 2024
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In this video, I show how the self propel drive works on a petrol lawnmower.
I take a look at a few things you can check to see if the transmission box is broken or if you simply need to do some maintenance or make some small adjustments.
Here's a link to a playlist that contains some of my other videos on self-drive repairs
• Lawnmower Self Drive V...
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Hi if the belt not that tight will that effect the speed of the sep drive
Thanks, just what I was looking for and has given me a good understanding of how it all works and to tackle the failed culprit. You have a very easy manner with teaching and it was clearly explained - great job.
Fantastic, this clarifys the dilemma I was facing : I now fully understand how the drive box functions any now how to check it, I didn't want to dismantle the box, so full marks this is the best video I have fond. Thanks Graham
Thanks for this brilliant video, everything explained so clearly. Now I'm encouraged to get my daughter's mower working again
Nice and straightforward explanatory video and not being drawn out getting to the point, like some others. Good man.
thanks!
Excellent video of the transmission on a self drive mower. This one seems to be made quite well compared to new mowers. Thanks for sharing. Be safe and may God Bless you.
Thank D Butler you too!
Excellent video. Small twig had got stuck above that drive chamber and had dislodged the belt from its channel. 10 second fix and now working perfectly. 👍
Doing my first lawnmower for first time, great help all round ty
Thanks fella. Sometimes things are staring you in the face.
That was well explained 👏
Thanks for posting bro - well illustrated - I have an Al-ko which I need to try and fix - you have pointed me in the right direction - cheers!
Thank you sir. Your videos are really well-detiled and clear on every thing. I have a lawn mower from Powersmart and it looks like the drive gearbox is bat. Although mine has a different drive ger box but the working principle is the same. Your video helped me a lot. Thank you so much for sharing your knowledge to help others. I liked your video.
I’ve had a Honda push mower for over 25 years with maintenance. No I’m not lying. I am religious on all fluid changes and maintenance. I even clean the carb every year.
Fixed a mates mower as it locked the drive wheels when pulled backwards. I looked for ages at the problem and sorted out the issue. The Spring was missing from the frame to the gearbox. Easy fix. Great videos mate.
Thanks Bobbelsekwol! glad you got it sorted.
Very good description on how to get the drive wheels up and running again
Outstanding video to know the function and why and how they do work is everything.
Very informative, thank you, Mick! I was really puzzled until I watched your video. You tell it clearly.
My mower`s self drive stopped working recently. Before trying to find the cause, I am happy that I watched this informative video. Thank you very much.
F H thanks for watching! hope you subscribed!
Thanks for taking the time to explain this drive problem. Although I have a problem with a Honda (Lousey support, demanding money for workshop manual etc., ) what you have shown is almost the same..Thanks for you time and effort
Thanks! Great profile pic! Great artist
Your a true wizard Paul, very well explained.
Cheers Ken!
Cracking video matey, Just got a Cobra self propelled that wont pull, If you lift it up the wheels will spin but on the ground it just makes a clicking noise. I'm going to check the pulleys are free first. That's as far as I'm at.... Thanks again. Dan.
Thank you! This video helped me get my mower’s self drive working again.
Subscribed 😁👍.
Glad I could help
Great video. Took the wheels off and dropped the axle out of my old titanium 5145hw today to fix the self drive. The spring was missing. Tried a spring I found but now to tight the box doesn't move. Going to have to try and find the correct spring.
Keep up the good work.
Thanks Steve!
Really enjoyed you instructions on the drive cable 👍🏻
Thanks Adrian
nice video mate im glad i dont have to mess around with the gears that often
Roy's The Boy No they are a right pain Roy!
Exactly what I needed to know, thank you Sir.
this guy is so good .
Hi Paul just watched your video and it did help to a point my self drive isn't working checked the belt the cable is tight moves the transmission box but doesn't do anything think it's the transmission box my lawnmower is a BMC 16 triumph
Great Job! Thanks for the help.
Best use of a snooker cue ever. 👍
Very useful. Thanks for posting.
Thanks so much for your detailed video
I have a problem with my castle garden wheels won’t go backwards
Thanks , very much information . I think, this will help me!
Thanks for this I have the makita palm 4601 and thE self drive wasn't working I noticed a spring had come loose and the tension rod was missing got the spring back on now the mower does move but need bit more tension on the belt.
Great bit of information. Thanks
Great video and explanation. thanks for your time.
Glad you enjoyed it!
Thank you for the very useful video !
Thanks, this helped a lot mate cheers👍
How spooky is that. I have a self propelled champion that the drive is engaged all the time. Now I have a much better idea what I'm looking at. Thanks brilliant and timely video.👍
Great! Let me know what you find!
Thanks great explanation!!!
I Have A XP mower thanks for the information
So cool the way they work 🤪
Great Video Mowerman my problem is on my McCulloch 40-50 cdpr great little mower but the other day i ran over some "wood chippings" thus causing the self propel to stopworking when i looked underneath a wierd shaped spring had come loose and was hanging.I cannot see where the spring has come from as i'm hoping that is causing the lack of drive hope you can enlighten Brian.
Nice video Paul, those plastic drives are crap as you said. That one has lasted well.
Yeah it's been amazing. I noticed in the new Mountfield brochure they list if they are "pro" aluminium transmissions or not nowadays
Thanks mate for the help
Any time!
Thank you!
Really good very useful
My newer Troybuilt front drive mower stopped working. I took the cover off the gear box and replaced the 1/8 inch pin that slides inside the gear. I had an older Murray mower in my parts pile that had the same gear box. Just took the pin from there and put it is the Troybuilt. Guess they don't make that part anymore. My self propelled is working again. The pin looks like a shear pin you might find in a snowblower arbor shaft.
Really helpful, have just bought a Qualcast petrol & the drive wheels won't action when the lever is pulled, but the lever is very tight, so I'm thinking my first port of call is to clean all the crud out as it may be interfering with the action of the little lever as in your video?
Thanks Phil for your very helpful video , I have a Qualcast 46cm which the self propelled has stopped working, when I took of the plastic belt cover off one side of the plastic pulley has completely worn away, I then found the this pully doesn't align up to the pulley behind the blade which would explain the pully beside the gear box being competely worn away to one side . Have you any idea please what the cause can be, I wondered if this misalignment could have been there since new and its took all this time to wear the one side of the pully away.
Thnx mate very helpfull, chears
On this type gearbox the clutch is two tapered sprockets which travel freely along the drive shaft. These are pushed together inside the "crown wheel" which has another taper which they lock into. And the the gearbox is Hereby engaged.
The sprockets can Jam inside the taper, resulting the gearbox wont disengage.
Thank you sir!
Great video. How do you add gear oil back if you pop the cover on the transmission?
Thanks!
Great vid very informative I am going to have to change the clutch drive cable and spring on my qualcast zsx 46 s-d where can I order the cable online looked everywhere can't find one cam you help would be much appreciated thanks.
Educational.
Cheers mate
Great show, how do you put the transmition fluid in and how much do you know.
All the best man
I found the spring for the drive (the one that disconnects the drive.) on my lawn. how would that effect the drive. Kindest regards Mick.
Hi mate I have one due for a drive axel fix. I picked one up off eBay for cheap. They are a pickle to do but can add value to the mower when sold. Hope your good mate
I'll look forward to the vid Mick. My lads cleaned my toolbox for me yesterday btw!
Thanks! Have a Q if you have time. My transmission are the same and my Q is about why it has to be leaned forward or backward? Also my transmission box had oil in it half full. Something is wrong inside the box and the axle goes very heavy and it can not leave the drive-mode, it always spinning the wheels.
Hi mate. Looking for bit of advice on this. Have a Husqvarna self drive with similar mechanism. Have replaced the belt and retensioned cable. When you pull the handle, the belt tightens on a pulley which drives one of these transmission boxes. It's good enough to drive the back wheels when I lift mower up of ground but as soon as it's on it's own weight, the mower isnt being propelled. The drive shafts to each wheel are just spinning with no drive?
I swapped both rear wheels over as one is alot more worn than the other (no threads on tyre) and I got full drive back for a minute. But now it's gone again!
Any ideas?
Hey I see the problem No Motor. Just kidding excellent video tutorial.
Thanks Joseph it's all back together now
Nice video Paul . The later ones as you say are plastic which is garbage .
I think the the drive cable is the key as the first SP470 does not have
a eared locking tab connection .
Interesting Pete. I wonder what year they changed it over? Did this look like aluminium to you?
Not sure Paul but when they changed the wheels and trims to the Pepper pot design.
Awsome vid mate!! I have a problem with that the lever is stuck in the transmission. So the selfpropellant cant be turned off. Do i need to take it apart, or is there a trick that involvs knocking with a hammer until the clutch/plate that connects the gear loosens?? Thanks for a really nice vid !
Hi, I have a similar setup on my Makita lawn mower. The wheels actually turn when I engage self drive, but it just doesn't have power. It used to climb up the hill with no issues. Now it struggles on any incline. Any ideas what could be wrong?
Yet another great video thanks I like how very detailed you go into all your videos. I have only been buying and repairing mowers a short time but at a standstill a the moment due to the virus lockdown. If I could just ask you a quick question please, I picked a mower up the other day I put a new diaphragm and gasket on carb but when I prime it , it pulls the fuel through but then after a few pumps it stops pulling the fuel through could this be the primer bulb although I can’t see anything wrong with the bulb thanks for your time..stay safe
That's a strange one! I guess the only way os to replace the primer bulb? I try later on mine and see how many times it lets me prime.
At the back of the carb there should be an o ring and an o ring shaped clip that holds it in place, sometimes these can fall out and could cause your priming problem.
Should there be any movement up/down shaft. Mine has about 5mm play both ways
I have an older (1986) Murray rear drive push mower where the lever on the transmission (Comet Industries) hardly moves. The transmission does work but the metal transmission barely moves and the handlebar lever attached to the lever is VERY difficult to pull.) Before I open the transmission, is there an obvious fix? The cable and springs are perfect. THANK YOU for any suggestions!
I would check the power drive cable adjustment as the first thing to do.
I have a hayter harrier pro about 3 years old . On starting works fine but after about 5 minutes stops pulling. If l leave it for an hour or so it works fine again but only for another few minutes. Any ideas
I badly need help!
My lawnmower ONLY drives... It wont stop.
The cable is ok, but it is slacked, but the lever on top of the gearbox moves forward under spring tension which makes it drive.
So basically, it looks like there is no spring pulling the lever back, but I am not able to find where this should be attatched... any idea's?
Thanks!
Hi I have a mountfield with a drive problem exactly as you describe here. I wanted to know an estimate of repair cost or if you would like to have it, where are you based?
How do i remove the rear baffle on a Mountfield sp470, cannot see any videos on this. Many thanks
ok great video but i have one stuck in drive do you have any ideas bud
I have a dual drive push mower, ,the cable seem to only go to the rear wheels, there is a belt that drive the front wheels from the motor shaft. The front wheels don't engage when the motor is running but the belt is turning the pully??? Also the rear wheels are in a semi drive mode from the start of the engine but when you pull the cable tension it engages fully in the rear but still nothing on the front. I don't find any cable connection on the front wheel at all. This is a Briggs engine Craftsman Gold model 6.25 HP mower, Can you help??
Bought a Mountfield on Monday, 3 days later my self drive cut out completely on 3rd lawn cut, have no idea where to begin.
The problem with my mower is lack of traction as you describe. The belt has broken however when I check the drive gearbox this seems fine, if I turn the pully by hand as you do in the video and engage the drive mechanism the shafts to the wheels turn but the wheels don't.
I have removed the wheels which exposes the cog on the end of the shaft. The coc doesn't turn when the shaft is turning, I can turn the cog by hand and it doesn't turn the shaft, so something is wrong with the connection of the shaft to this cog.
I am guessing that there is a a drive gear on the end of the shaft that communicates internally with the wheel drive cog. Am I correct?
If so does this mean that I need to replace the drive shafts and the wheel drive cogs?
I haven't removed the wheel drive cog to look as it is held with a circlip and I don't have circlip pliers.
I don't want to purchase circlip pliers only to discover it is a lost cause and cannot be repaired (or too expensive to repair)
Your experience on this issue would be most welcomed.
Your explanation of the gearbox and clutch mechanism was very thorough and easy to digest, well done.
BTW, the link to your website doesn't work!
Hi I a A Harry lawnmower self propelled 2005 and I noticed that one of the wheels drive an d the other one doesn't and then that might happen to the other side I took the wheels off and cleaned them couldn't see any wear in these have metal drive on the wheels wondering where else to look🤔
Great video thank you. Just watched your video as I have a viking Mb 6.2 RH mower. Self drive gave up. Opened it up and the plastic gear had totally worn down. Also in the process I broke the retaining plate/washer. 😕 Do you have parts or where I can get some? Was told I would have to replace whole gearbox and shaft. I can send photos. Thank you 👍
Not sure about individual parts tbh. I would send an email to the main dealer
@@MowerMan OK thank you 👍
I just changed my belt on my toro but not my front wheel drive wheels stay constantly. When i turn on the mower the wheels keep turning with me holding down the handle. Please help
Do you know if florabest L446s mower has briggs & Stratton engine?
Have you repaired mac Alister 125cc self drive? Mine isnt working.
Cheers
Can you please help me i have a sanli mower self driven it was working fine the other day and the drivd stopped working the drive belt snapped so ebay sent me one out and I started the mower up and it snapped the belt there have sent another is there a tensioning spring on the drive box 📦
Hi , can I ask after following your excellent video ...is there any difference in the cables between a roller model and a standard one? (46sd 46sdr flymo) as the price is double for the sdr ones on the official websites ?
Really not sure tbh sorry. Maybe asked the company that's selling
Nice video mowerman, have you still got the new mower? 👍🍺
Rob Rusticwoodlandproducts Yes Rob! They don't seem to bothered about it back!
Hi, my drive had a fault where the drive works when the operators lever is NOT pulled in. I have cleaned the outer gearbox of grass and debris and lubricated. I can see the gearbox lever move that engages the gearbox drive when I pull in the operators lever but the wheels turn. This is a runaway lawnmower.
I have exactly this transmission. My problem is that eventhough the I don't link the two wheel in the transmission box together (see 9:30) the axle is spinning. I don't understand why this is happening.
Sorted it was just the cable that needed tightening and now the self drive works
Steve Longmore Excellent Steve
Hi interesting video to see what is inside the self drive box, got a mountfield mower at work it's about 4 years old and the belt keeps coming off. Could it just be a bad belt.
Stephen Shippam Most likely needs the spring tensioner tightening up a bit. make sure the belt isn't too thin also
@@MowerMan thanks for the and your advice I will order a new belt and check the spring tensioner I may have to send this mower for repair as I don't know if I am capable of doing it,
@@stephenshippam9374 If its under warranty get them to do it
@@MowerMan hi no unfortunately its not under warranty,
I have a front wheel drive montfield. 1970's. Can I get parts for it? Thanks! Bob
Hi, I did a mistake , before adjust drive cable (only think I must done), I remove all gearbox screws, so oil was drawn, thinking it was a protection cover. How can I fill it again and what kind of oil should I Use? thanks for your support
transmission oil
@@MowerMan Automatic type tranny oil (ATF) or wouldn't gear oil that is used in the read end (differential) of older type cars be better?
Where did you get your battery for your Yamaha 342 I’ve been searching the Internet or eBay for a battery
it's just like a moped batter
Only one wheel drives on my mower and I just want to know if that's normal or if I need to investigate and do a repair to get both driving, thanks
Normal
@@MowerMan Ok, so I investigated just now and find there is a RATCHET inside the pinion on each wheel (because there is no differential). So it's not like a kids tricycle one-wheel-drive arrangement. After cleaning and greasing, both wheels drive now. So, it looks like you need some more training, mate!
What do you think is wrong if only the left wheel is turning? The right wheel doesn't turn.
I’d like to know if it’s possible or easy enough to slow down a self propelled one speed mower.
Slow down the engine and the drive will be slower
@@MowerMan
Wow thanks for the quick response.
Now, can you guess my next question?
@@iant9461 You need to bend the governor spring tab that the spring attaches to. There's some videos on youtube
Question if i may,
Husqvarna 247sp drives fine but wheels lock up when trying to pull backwards?
Any ideas?
Sound like the drive gears have worn out
@@MowerMan oh. Ok. Thanks for that👍🏻
More likely to be seized pawls. Difficult to get explain so Google self drive pawls seized for a better explanation 👍@brian Connor
@@brianconnor1810 More likely to be seized pawls. Difficult to get explain so Google self drive pawls seized for a better explanation 👍@brian Connor
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cant work out where drive belt spring locates on drive motor
Mine has a rear roller that rolls as soon as it’s started ahhgh!