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On squealing tractors...


 
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Valiant Farmer
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Joined: 13 Aug 2018
Posts: 46
Location: New Zealand

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PostPosted: Wed Oct 10, 2018 2:45 am    Post subject: On squealing tractors... Reply to specific post Reply with quote

Hi all,

I have a David Brown Cropmaster that has a loud high pitched squeal.

It has been sitting for a week and the water level has gone down, and the oil level has gone up (with a milky colour...).

When I went to start it this evening, it was hydro-locking.

To give you some history, I picked it up from a farmer who was trying to get rid of it, and he has no idea of its history. The exhaust was not covered, and some of the gearbox bearings had fallen out, locking up the engine...

The squeal is just a recent development (maybe for a month or so?), and the radiator has been holding water well for a while.

I would like to know what the squeal is, and whether you think the head is cracked.

I am grateful for any advice, as this is a special project of mine and I have put a lot (and I mean a LOT!) of hours (and months) into this machine to get it running!

Thanks!

Joshua
 
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1954Frank
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Joined: 08 Sep 2018
Posts: 73


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PostPosted: Wed Oct 10, 2018 5:20 am    Post subject: Re: On squealing tractors... Reply to specific post Reply with quote

I don?t know anything about David Browns but low coolant and milky oil usually indicate a bad head gasket, or cracked head. If you have ran it quite a bit in this condition then bearings or other moving parts may have been damaged. Does it knock? I suggest you remove the head for inspection and take it to a machine shop and have it checked for cracks. Further disassembly may be necessary to inspect crankshaft and rod bearings...
Flywheel, clutch and trans troubles could be causing the squealing. Good luck.
 
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kevinthefixer
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Joined: 23 May 2017
Posts: 895


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PostPosted: Wed Oct 10, 2018 6:26 pm    Post subject: Re: On squealing tractors... Reply to specific post Reply with quote

Don't forget the fan belt. Always check the easy stuff first. But the only way to tell about the head is to disassemble the motor; no other way to tell if it's just the gasket or if something's cracked. Not sure about your motor but some of them had head studs that went all the way into the water jacket, if they aren't properly sealed water can seep up into the head where oil is supposed to be.
 
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