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Case Tractors Discussion Forum
Show Parts for Model:

About to look at a DB885

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ScottNC

01-03-2018 05:53:29




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New to the site. Have been reading David Brown 885 archives for over two hours. Lots of tips on trouble shooting/repairing the PTO, 3-point and trouble shooting the diesel engine.

I am considering driving over an hour to look at a late 70's to early 80's diesel DB885 with a front end loader. According to the owner there are no mechanical issues. Everything is supposed to work. New front tires, decent rears, lift works, loader works, tight front end, sheet metal and paint in good condition.

One exception is it needs a snort of ether to start whether the weather is hot or cold. Evidently there are no pre-heaters on the 885? Runs fine once running, no smoke or performance issues after that. Read something about a cold start valve, I believe on the underside of the pump? Given the potential for pump issues from the use of low sulfur fuels in older machines should I be concerned? When I go to look the tractor over and test drive it, are there potential faults particulars to a 35-40 year old 885 I should concern myself with to avoid costly repairs?

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ScottNC

01-04-2018 04:18:56




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 05:53:29  
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Any chance of a picture or link so I know what to look for?



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ScottNC

01-03-2018 12:22:28




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 05:53:29  
So, back to my original question about test driving an 885, what should I be looking for that is common-to or a-be-sure-to-watch-out-for issue on a David Brown?



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ScottNC

01-03-2018 09:58:38




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 05:53:29  
Why would the pre-heater have a fuel line? Is it inline with the injectors? The owner claims it doesn't have one. He seems to be diesel fluent.



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Dieseltech

01-03-2018 11:40:46




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 09:58:38  
Diesel intake heaters are either all electric, or Thermostart which use two electric coils and burn diesel fuel in the manifold for cold starting. Thermostart units are popular on David Brown, Ford, and MF tractors. First coil starts heating, then the second allows some fuel in after about 12 seconds. With the switch held on heat-start position the warm air is drawn in when the engine cranks over. When used correctly they work well. CAV lists low, medium, and high flow units available depending on engine needs. What will ruin one quick is no fuel at the inlet to the assembly, coils will burn out with no fuel present.

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ScottNC

01-03-2018 09:51:57




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 05:53:29  
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Haven't the tractor it yet, still waiting on pictures before driving three hours. As explained to me, it starts fine once the engine has the least amount of heat in it. It is when cold starting in warm weather it likes a snort.



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Dieseltech

01-03-2018 08:48:19




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 05:53:29  
Just repaired an 885 injection pump, there's an advance lock out screw to help with cold starts. Look for a small shaft with a roll pin through the end, turn it fully clockwise to keep the timing retarded for cold starts. After engine starts back the screw out completely to the advance on position. Be worth a try and see if it helps. Hard starting hot could be the injection pump hydraulic head is worn, and may need replaced. Usually caused by lack of good fuel filter maintenance, or the filter center pilot O ring missing. That keeps the filter from being sealed between clean/dirty sides.

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Adirondack case guy

01-03-2018 07:36:28




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 Re: About to look at a DB885 in reply to ScottNC, 01-03-2018 05:53:29  
I find I hard to believe that it doesn't have a thermo start preheater on it. Look closely at the intake manifold. There should be a heater (sort of looks like a big spark plug) with a fuel line and wire hooked to it. To activate it just rotate the key switch CC and hold for a bit. If all you see on the intake manifold is a big hex plug there is no preheater.
DBs were Not real good about ingesting ether, so look and listen to how the engine acts when started.
Loren

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ArleninOr

01-03-2018 16:39:03




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 Re: About to look at a DB885 in reply to Adirondack case guy, 01-03-2018 07:36:28  
Loren, have worked on a lot of 885's and 990's. Have seen at least a dozen without the thermsotart. Actually have a complete unit sitting on my desk as I write this. Someone on here asked about one for his tractor a couple months ago.



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