Wingett or thwaites dumper, repair drum clutch

Discuss dumpers here

Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Wingett or thwaites dumper, repair drum clutch

Post #1 by Jonm » Mon Jul 31, 2017 2:10 pm

I have a thwaites or winget dumper with a clutch made from a car drum brake, possibly triump herald. My searches on the internet has found a number of references to this type of clutch fitted to a thwaites dumper. I want to strip down the cluch and get it working properly, currently it slips after a bit of heavy work. I have tried loosening a few bolts but it seems like it wants to stay put. Access is a bit difficult as the floor plate above should be removable but someone has welded it in place.

Can anyone help with how to remove the clutch, i have included a picture below.
Regards, Jon

Image


Cheekymonkey
Posts: 30
Joined: Sat Sep 24, 2016 6:58 pm
Real name: Pete
Has thanked: 8 times
Been thanked: 1 time
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #2 by Cheekymonkey » Mon Feb 12, 2018 9:05 am

Hi Jon, I have the same assembly on my old thwaites nimbus & need to overhaul sometime myself sometime. From what I managed to find online it should just pull off the shaft but i havent got to try mine yet. my release bearing is pretty much non existent it's been worn away, yours looks ok. Access is definately a PITA I haven't worked out how i'd get in there yet either.

If you didnt know there is a small adjuster bolt to adjust the shoes, I've maxed mine out & managed to get a little more use from the clutch this way. It's a square peg coming out of the hub face.


Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #3 by Jonm » Mon Feb 12, 2018 5:52 pm

Pete
Thank you for the information. I managed to dismantle and repair the clutch
Here are the instructions

Image
Image
Image

Photos to follow


Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #4 by Jonm » Mon Feb 12, 2018 6:12 pm

Here are some photos
Here is the photo of how I compressed the clutch with a jack to get the spring out. I had to keep tapping the jack to jolt the mechanism to make the spring compress. Jack was not pushing completely square. If doing it again I would have drilled a hole in the plate on the chassis behind and used a threaded rod.


Image

Here is photo of puller I made to remove the backing plate, and also a picture of the backing plate and shoes after removal

Image

Here is a photo of the puller in use to remove the backing plate, see note 4 of dismantling instructions.

Image


Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #5 by Jonm » Mon Feb 12, 2018 6:24 pm

Here is a photo of the clutch with backing plate removed

Image

And here is my attempt at compressing the spring a bit to get it in place, I used the jack as shown above to refit the spring but with plenty of tapping the backing plate with a hammer to jolt it and let the jack push it in place. Care is needed not to tighten the jack too much and damage the thrust washer. As above, something pushing perfectly square is needed. The flooring above my clutch was welded in place and some of the welds were difficult to get at, really I should have removed the floor.
Image


Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #6 by Jonm » Mon Feb 12, 2018 6:41 pm

Here is detailed drawing of clutch which goes with the above instructions

Image


Cheekymonkey
Posts: 30
Joined: Sat Sep 24, 2016 6:58 pm
Real name: Pete
Has thanked: 8 times
Been thanked: 1 time
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #7 by Cheekymonkey » Tue Feb 13, 2018 8:13 am

that's brilliant, super helpful I'll make a note of those drawings for when i get round to doing it.

did you just get someone local to reline the shoes?
did you replace the release bearing? (if so where did you source?)


Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #8 by Jonm » Tue Feb 13, 2018 8:32 pm

The shoes were in reasonable condition so I just cleaned them up. Release bearing was ok.


Topic author
Jonm
Posts: 20
Joined: Fri Jun 16, 2017 8:16 am
Real name: Jon Mabbett
Has thanked: 6 times
Been thanked: 5 times
Flag: Great Britain

Re: Wingett or thwaites dumper, repair drum clutch

Post #9 by Jonm » Tue Feb 13, 2018 8:33 pm

I did read that the shoes are from a triump herald if that helps.


Return to “Dumpers”

Who is online

Users browsing this forum: No registered users and 4 guests