Mower rear wheel drags

[ipbr21054]

Hi,
Getting the mower ready for next month.
When i put the mower away in November i remembered the following.
When pushing the mower the left wheel would drag along the floor a little then it would rotate normally as it should.
I watched this for a while & it only does this on the left wheel.
When i operate the bar & use the self propell it doesnt do it at all & works perfect.

Any idea what i should be checking or looking for.

Previous to this say 2 months before i did take the wheels off and clean them / supply some grease around the gear / pin etc.

Mower is Champion R484 and setup is as in photo

 

[just pumps]

I`m not a lawnmower repairer so what happens if you operate the bar with the engine off? Does pulling the bar release something allowing it to freewheel?

 

[HERTS P&D]

John will be along soon.

Andy

 

[Burnerman]

You may be a victim of the usual plastic engineering here, but anyway....
Clean any crap out between the teeth of the large plastic driven wheel 401 and the small driving pinion 404.
When the wheel is popped back onto its spindle, excess float here causes the two gears to bind. Similarly if the bearing 405 is worn or dry.
Check that drive pins 416 are free to move in and out of their drilling and the drive dog 408 is clean inside and greased.
Your problem is, the two gears are binding slightly due to misalignment and at the end of the day you may have to live with it to a degree.
John

 

[ipbr21054]

OK
I will get it apart on the weekend thanks

 

[ipbr21054]

Hi,
Is it then worth me "as i cant do this untill the weekend" order 2 of the plastic/nylon inserts marked as 405 in the attached photo.

 

[Burnerman]

I think 405 is a cheap flanged bearing, but I could be wrong. No harm on replacing them but you need to check the bushing on the main, large wheel if you can. I don’t know if the wheels are bushed, some are, some aren’t.
John

 

[ipbr21054]

Sunny today so i took a look at this issue.
Up & down the path & it locked up then freed off.
I removed the wheel which left me with a plastic back plate & a metal gear.
I can turn this forever without any issue so all ok there.
Wasnt that dirty but noticed the nylon inserts were a touch sloppy & the 13mm nut holding the wheel on could on been tighter.

Ive ordered 4 new nylon inserts & also 4 bearings which look like they could replace the nylon inserts

 

[ipbr21054]

Afternoon, Fault now fixed.
Grease is good for allowing items to move with next to no resistance BUT over do it & it creates drag.
This was my problem.

Look at the supplied photo you will see a cylindrical pin "BLUE ARROW"
This needs to move with no resistance or issue as it needs to move freely inside the cogged gear "GREEN ARROW"
The cogged gear is held in place on the back plate "RED ARROW" buy a circlip.

With all these items cleaned in soapy water with no grease as the wheels turn forward or backward the cylindrical pin falls either direction which either connects with the cogged gear or no engagement,so pin one way allows freewheell & pin the other way allows engagement.

All put back together & works perfect.

Thanks

PS
I removed the old nylon bush inserts & replaced them with bearings.
Now they will last a lifetime.

 

[Burnerman]

Nice work!
Its worth stripping these parts out on a yearly basis if the machine gets a lot of work - there’s always lots of stray grass and grot gets trapped in there, usually with moisture too.
Some people like to grease the teeth of the plastic cogs too - which is a nonsense.
John

 

[ipbr21054]

Thanks.

I also popped off the white nylon gears that mesh with the cogged gear & gave them also a good clean