Question about 1979 Harley Davidson XLH 1000 Sportster

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How do you fix oil pressure that is building up in the oil tank

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There is a vent hose there that prevents this from happening check this to made sure it is not clogged or pinched off

Posted on Feb 02, 2010

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1 Answer

My compressor keeps pumping but air pressure in tank doesn't go up what is the problem


I have a compressor and the last time I used it, it was doing something similar. I haven't tried anything on it yet but I think there are two possibilities (Either it needs oil ) (It may need some air pumped into the tank to get it to build up pressure.) Either those two or the pressure switch is bad. The switches usually are very tough so not likely that but as a last resort I would try a new one. I do think lack of pressure would likely be the oil is low. I think the oil makes a seal around the piston and that causes it to build pressure. If it will still blow up a tire there should be enough pressure to turn the relay switch off. Mine will still blow up a tire so not sure if it is a pressure problem. May need pressure put into the valve on the tank and if there is one I will try that today.

Aug 10, 2017 | Air Tools & Compressors

2 Answers

Why is my 1998 1200 Harley Davidson Sportster building oil pressure up in oil tank and filling up with oil and smells somewhat like gas like the oil is not flowing


Hi, Michael and the usual suspects are:
1. Oil tank over full.
2. Feed side of the oil pump going south.
3. Breather system clogged or blocked.
4. Oil tank vent line pinched or blocked.
5. Diaphram in petcock has failed and is allowing fuel to fill up bottom end when the engine is shut off.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below, and for specific information or questions, please feel free to contact me at xlch@mail.com. Good luck and have a nice day. Harley Davidson Manuals Mark Workshop
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Apr 10, 2016 | Harley Davidson Motorcycles

1 Answer

Why does oil pressure build up in the oil reservior


Did you add oil , engine is a dry sump, and reservoir oil tank will gravity feed and swamp crankcase, when sitting over winter. Also make sure tank is vented.

May 07, 2014 | Harley Davidson Motorcycles

1 Answer

Why does oil pressure build up in oil reservior


Check for a pinched/blocked vent line.
Possible bad piston rings and over pressurizing the crank case (compression blow-by).
Overfilling the oil tank. Check with engine hot.
Also, it could be just a aged/dried up/ cracked o-ring.

May 07, 2014 | Harley Davidson XLH Sportster 883...

1 Answer

Stanley Bostitch compressor cpack model runs and runs but won't fill tank.


check for any air leaks and fix as needed. then look for oil coming from cylinder heads , if oil is coming from heads you have blown head gaskets ,it wont build pressure like this. you might also check the pop off valve to be blown open. push the pin in and see if air starts to build up then. If so get a new valve.also check the drain valve under the tank and make sure its closed.

Apr 17, 2013 | Air Tools & Compressors

1 Answer

To much oil in tanks air not building up fast


It sounds like your fault could be worn rings on the compressor pistons causing slow pressure buildup and excessive oil in tank. Replacing rings, checking poppet valves for proper sealing and having cylinder bores honed should fix problem.

Sep 15, 2010 | Dewalt 5.5HP 8GAL Gas Wheeled Portable...

1 Answer

Pressure in gas tank


leave the cap cracked open slighlty as to assure no pressure builds, and if the problem accures during that time your problem is somewhere else

Aug 11, 2009 | Heating & Cooling

1 Answer

1989 sportster building pressure in oil tank


A little pressure is normal on the sportster. I have seen where if the oil tank is over full it can blow the dip stick out. Most of us who ride sportsters keep the level showing on the dip stick about midway between the low and full line. Doing this will also help with oil blow by out the air cleaner.

Mar 27, 2009 | 1993 Harley Davidson XLH Sportster 883

5 Answers

My EC12 builds up pressure, but then releases all but about 10 psi.


The non-return valve is sticking and it's an easy fix. First, for safety, unplug the electric power to the unit and release any pressure in the tanks. Then unscrew the cap of the non-return valve (between the compressor and the tanks). Inside you should find a tapered rubber plug which is probably sticking in the valve housing. Sand down the diameter of the large end of the plug, being careful not to damage the flat face at the narrow end (which is the sealing surface). For sanding try 400 or 600 grade wet-or-dry paper and sand until the plug just moves freely in the housing. Reassemble and the compressor should work. Incidentally it's an oil-type unit, and quite durable. Make sure it has enough oil.

Sep 23, 2008 | Hitachi EC12 Portable Electric 2hp Air...

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