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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> no oil pressure
Post Info TOPIC: no oil pressure
sammyttr


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no oil pressure
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right chaps some good news my ttr has been rebuilt today with second hand barrel, piston and cylinder head and runs fine, only problem we have is we got no oil pressure, we have filled up with correct quantity of oil, taken pressure plug out of oil filter and nothing is weeping out did the minute test and nothing came out, took oil filter out was pretty much dry.

Any ideas To what it could be, maybe oil pump or oil pump teeth me and mate are a bit stumped.

Well it happy its started up and runs and ticks over fine.



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TTRfan


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Good job you checked for oil flow Sammy!

I have heard of this problem a couple of times. In both cases the engine had been fitted with a clutch cover that had come off a TTR with an oil cooler fitted and the blanking plug that sends the oil around the cooler had been left in no



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sammyttr


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Not that unfortunately. The bolt is right length, oil pump maybe ?



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TTRfan


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This is what the oil pump's insides look like!

Could the drive pin have sheared or be missing?

Oil pump insides.jpg



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sammyttr


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Have you got a pic by any chance of what it should look like as standard with out an oil cooler

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TTRfan


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See http://ttr250.activeboard.com/t44874914/oil-cooler-information/ and scroll down. There is a pic with length of standard blanking plug.

Brian



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sammyttr


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How do I check oil pump is working or is it same test as before

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TTRfan


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sammyttr wrote:

How do I check oil pump is working or is it same test as before

Same test as before. I have not heard of an oil pump failing completely  confuse



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TTRfan


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I have been thinking about this Sammy and there has got to be something obvious.

Is the pump drive cog engaging properly with its driving cog? See pic below.

Is the O ring to the right in the pic in good condition? 

If the clutch cover is off, can you blow through the oilways to make sure there is no blockage? Maybe feed some oil down from the check bolt hole to make sure it runs out the bottom freely?

I will keep thinking confuse

Brian

23 March 2011 - Steves engine 005.jpg



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sammyttr


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Mate took pump off submerged in oil and spun it, there was pressure, all bolts are correct not changed anything in the cover and no pressure since it went on me, am and my mate are stumped.

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TTRfan


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Ah - that seems to point to the pump. Crack it open and see if there is a problem inside and that all the oilways are clear.



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sammyttr


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Thanks I'll send these to my mate who has the bike at his currently and let you know it's an odd one

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sammyttr


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Well a happy update she runs, rides and goes great now, got loads of pull on it, apart from oil pressure Bolt What else can be checked

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TTRfan


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sammyttr wrote:

Not that unfortunately. The bolt is right length, oil pump maybe ?

Hi Sammy. So it did turn out to be the bolt that caused the problem and with the standard bolt fitted you now have oil pressure?

Brian

 



-- Edited by TTRfan on Wednesday 27th of November 2013 07:53:07 AM

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sammyttr


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Yep correct Brian, first couple of cranks with bolt cut down it wazzed out of oil pressure bolt, engine is really strong feels faster than before and loads of compression

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