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clutch problems
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dumper man



Joined: 06 Oct 2014
Posts: 1

PostPosted: Mon Oct 20, 2014 11:31 pm    Post subject: clutch problems Reply with quote

hi all,

i have a 2 tone thwaites dumper that im restoring. im having trouble getting the clutch off its shaft and need some help with the matter. the clutch and gearbox are the same type as in the post on this forum "My Thwaites Orion dumper, caution, picture heavy!" by julian. i cant seem to get in touch with julian to ask his advice so if anyone knows their way round these clutches or knows how i could get in touch with julian i would greatly appreciate your help.
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peter scott



Joined: 18 Dec 2007
Posts: 7113
Location: Edinburgh

PostPosted: Fri Oct 31, 2014 10:44 am    Post subject: Reply with quote

I know nothing about dumpers so please excuse if I'm teaching granny but the clutch looks to be a fairly normal rod operated drum brake assembly.You need to unscrew the adjuster fully to back the shoes off. The adjuster is at the bottom of the picture.

If you've already done that then it's possible that the linings have rusted themselves onto the drum. The usual treatment for that is to whack the drum all over with a heavy hammer but you would need to have someone disengaging the clutch at the same time.

Clearly the backplate and shoe assembly can only be withdrawn from the drum whilst the operating rod is being pulled.

Peter


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http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon
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welder



Joined: 26 Nov 2007
Posts: 265
Location: North Warwickshire

PostPosted: Sat Nov 15, 2014 7:04 pm    Post subject: Reply with quote

Hi Dumper Man, welcome to this cracking forum.

I used to be a plant fitter many years ago and looked after a hire fleet of Thwaites dumpers, amongst other machinery. Everything stated/suggested by Peter Scott is bang-on the money, right down to the application of Newtons via a large hammer.

Once you've got everything apart you'll realise that the clutch is bum-basic with virtually nothing to go wrong which, indeed, they almost never did.

Good luck in your endeavours.

Ian
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