No oil pressure

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Wrose2
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No oil pressure

Postby Wrose2 » Tue Aug 04, 2015 6:52 am

OK guys I'm new to this cub world and need some help. I'm redoing a 52 cub and I think I've got all the bugs worked out except for an issue with no oil pressure. I primed the oil pump before we started it back up for the first time. I could see that as we turned the engine oil was returning into the top of the filter area , so I know it is circulating oil. But I'm not getting any reading on the gauge. I put another new gauge on and still nothing. I also made sure that the passage way behind the gauge was not blocked. I'm thinking I need to check the pressure regulator down by the lower water outlet. I don't know anything about how that regulator works and what should I be looking for?

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bob in CT
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Re: No oil pressure

Postby bob in CT » Tue Aug 04, 2015 7:02 am

It is just a simple piston backed up by a spring. Pressure goes up, the piston moves with the spring as the regulator. Remove the nut and the spring and see if the piston is stuck open in the bore.

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Re: No oil pressure

Postby staninlowerAL » Tue Aug 04, 2015 7:22 am

Wrose2 wrote:....But I'm not getting any reading on the gauge. I put another new gauge on and still nothing. I also made sure that the passage way behind the gauge was not blocked.

What pressure range does your new gage read? If you have a 0-60 or 0-100 range gage the oil pressure will probably be too low to register on the gage.

Wrose2
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Re: No oil pressure

Postby Wrose2 » Tue Aug 04, 2015 7:37 am

Not sure about the range of the gauges I have. They are suppose to be the right gague for the year. They don't have numbers in the face. Just a small red area and a larger white area. That could very well be the problem . it was pushing oil out of the top of the filter bolt before we replaced the brass ring and tightened the bolt more. So I'm thinking it has to have some pressure to do that. Both the gauges I tried came from the same e-bay seller, so it could be a problem with both of the gauges. I guess the easiest thing to start with would be putting a gague on that I know works.

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Re: No oil pressure

Postby Barnyard » Tue Aug 04, 2015 7:41 am

Wrose2 wrote: it was pushing oil out of the top of the filter bolt before we replaced the brass ring and tightened the bolt more.

Be careful not to tighten that bolt too tight. You can easily warp the top and never get it to seal.
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Re: No oil pressure

Postby Bigdog » Tue Aug 04, 2015 8:09 am

If there was engine work done it is possible that a plug was left out of the block.
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Wrose2
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Re: No oil pressure

Postby Wrose2 » Tue Aug 04, 2015 8:18 am

Don't know the history of this Tractor before I got it. When I got if the engine was stuck and we did have to take the engine apart, and found it had been bored out before. So yes it has had alot of engine work in its 60+ year life. What plug are you referring to that could have been left out of the block?

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Re: No oil pressure

Postby Stanton » Tue Aug 04, 2015 9:01 am

Believe this is what Bob in CT is referring to:

http://www.cleancomputes.com/Cub/Blue%20Ribbon%20Service%20Manuals/GSS-1013%20Engine%20Lubrication%20System/GSS-1013%20Engine%20Lubrication%20System.htm

Or go to link above (Rudi's Manuals, Blue Ribbon Service Manuals, GSS-1013). This manual tells all about the pressure regulating valve.
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bob in CT
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Re: No oil pressure

Postby bob in CT » Tue Aug 04, 2015 9:13 am

Wrose2 wrote:Don't know the history of this Tractor before I got it. When I got if the engine was stuck and we did have to take the engine apart, and found it had been bored out before. So yes it has had alot of engine work in its 60+ year life. What plug are you referring to that could have been left out of the block?

There are several oil gallery plugs but two of them are internal. There is one behind the cam gear that has been forgotten more than once. You have to take a lot apart to check that one, unfortunately. The other is in the center of the valve chamber behind the side cover.

You can always test a oil gauge with regulated air pressure. 20 psi is plenty.

Wrose2
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Re: No oil pressure

Postby Wrose2 » Tue Aug 04, 2015 9:57 am

Now I'm worried that is may have been a problem before and that's why it had a locked up engine when I got it. If one of these plugs is missing that will keep it from building oil pressure right?

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bob in CT
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Re: No oil pressure

Postby bob in CT » Tue Aug 04, 2015 10:17 am

Wrose2 wrote:Now I'm worried that is may have been a problem before and that's why it had a locked up engine when I got it. If one of these plugs is missing that will keep it from building oil pressure right?

Yes. It is the end of the gallery.

Wrose2
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Re: No oil pressure

Postby Wrose2 » Tue Aug 04, 2015 10:51 am

OK I'm hoping that it's just an issue with that pressure regulator by the water outlet. I'll check that after I know I have a gauge that works. There was a lot of water in the oil pan when we drained it, so may be if water got to that it caused some problems with it. If that's not the issue I'll see about those plugs. Can you get to that one from the bottom of the engine via removal of the oil pan?

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Re: No oil pressure

Postby Eugene » Tue Aug 04, 2015 11:11 am

Wrose2 wrote: Can you get to that one from the bottom of the engine via removal of the oil pan?
No.

The gallery plug behind the valve tappet cover is easy to check and replace if missing.

The plug behind the cam gear requires the removal of the front engine cover and removal of the cam gear to install. In order to see if the plug is missing you still need to remove the engine front cover.
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Wrose2
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Re: No oil pressure

Postby Wrose2 » Tue Aug 04, 2015 12:42 pm

OK thanks for all the information. Unfortunately I'm going on vacation for the next week, so I won't be able to get into this for a while. When I do get into it I'll let you know what I come up with.

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Re: No oil pressure

Postby Jim Becker » Tue Aug 04, 2015 1:32 pm

Wrose2 wrote:. . . Unfortunately I'm going on vacation . . .

?????


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