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Can a broken drivewheel on a PB200 be fixed/mended; We managed to break our drivewheel/sprocket on our PB 200. Can one fix that, or do we need to buy a new/refurbished one?
Topic Started: Mar 1 2013, 03:19 PM (1,045 Views)
madsdyd
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Hi there.

Our ski club got a used PB 200 just before Christmas. We have not been able to use it much, due to lack of snow (this is in Denmark, not much snow), but we managed to break it Sunday.

:oops:

It appears that the bolts/screws fixing the driving wheel in the left side had not been tightened enough, and have worked themselves loose, and breaking the aluminium part of the drive wheel.

The drivewheel on the first picture lack all the "inner metal". Its been completely torn off. Its in the upper left side of the second picture.

Any chance that this can be mended / fixed, or do we need to buy a new drivewheel?

We have access to a capable metalsmith, but is uncertain if it is viable to try and fix it.

Any advice greatly appreciated!

Regards

Mads
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Snowmaking and grooming in extreme marginal conditions: Thats us!
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PB260
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Mads your track drive sprocket failure is something that I’ve not seen before although I can easily imagine how it would happen.

A competent metal worker could repair this and it may function adequately for a long time but I think that you would be wiser to buy a second hand or remanufactured sprocket. I wonder if the rebuilding would damage the polyurethane coating and mean that the sprocket would have to be recovered anyway. It could be so expensive that a new one may be a better option.

I’ve seen the splitter box housing (the alloy transmission between the engine and the hydraulic pumps) develop substantial cracks and operate for many hours after welding but eventually need replacing. Everything is repairable but you must consider the cost in time, the good will of your metalsmith (one day you may need him urgently) and materials as well as the kroner cost and the likelihood that further complications will arise later when you may not be able to deal with them easily.

More importantly I think that you need to invest a lot of time and energy in operator training and maintenance checks.

Well maintained groomers are very reliable but you have an old machine with an uncertain maintenance history and your operators need to spend more time checking and tightening things than they do operating your groomer. I can see from your photo that you have a missing tyre guide and a narrow backing plate in place of a wide one, I’m sure that there will be many other similar things if you look closely. Many of these things can be maintained in a functional state given close monitoring and careful operation thereby saving you money but you must monitor very closely so that you don’t have expensive surprises like this one.

Alpine groomers typically get thorough inspection and monitoring on a daily basis and they sometimes still break. Many times though I’ve found small things that if left unattended to will become a large problem especially out on the snow.

Operating old groomers can be very successful but it usually means a heavy investment in time, money and sweat that will add up to many times the direct cost of operating your groomer.

Good luck. I hope that you get some more snow!
:letsnow:
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madsdyd
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Hi Greg.

Thanks for your answer!

Re the polyurethane coating - what is this?

You are right about the wheel guide and the backing plate. We only just received the parts list last week, so we have not been able to order parts until now. We miss, I think, 5 wheel guides, al in all.

I just wanted to know if it was possible. We do have a former metalsmith that is very active, and one of the operators of the grooming machine - I will check with him, what he thinks, re work and costs.

Also, we have not got a quote on a new/used drivewheel/sprocket yet. I am crossing my fingers it is not too expensive.

We will have to be learn how to check the machine. We do have a daily check list from the docs, I guess we will have to learn to actually use it!

Thanks again

Mads
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Mads the polyurethane coating is the yellow plastic that covers the teeth of the drive sprocket.
If it is damaged it can be rebuilt although the rebuilt ones don’t seem to be as good as the new ones.
Here is the address of a company that does this in Nevada. I’m sure there will be a company in Europe that does this also.
http://www.fallline.com/store/Results.cfm?Cat_ID=8&secondary=38

When reassembling the sprocket it is important to use locktite and to use the correct tension setting so that it does not come loose again. You will need to check that the threads in the final drive are not damaged. The replacement cost of the final drive that the sprocket bolts to is probably as much as your entire groomer so take good care of it.

Cheers,
Greg
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