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Author Topic: Ultima EVO 113" No Oil Pressure  (Read 1118 times)

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Dan_Lockwood

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Ultima EVO 113" No Oil Pressure
« on: February 19, 2021, 09:52:15 PM »

I have an Ultima 113" that I bought back in '08 along with a frame from Milwaukee Iron and for many reasons, have just gotten it up and running about a month ago. I guess you would say N.O.S. :)

On my very first startup I pulled the spark plugs and cranked it over until I had oil pressure (the idiot light went off). Once I got it to run and idle nicely, the oil light would go off immediately after it fired up.... GREAT!

After a few heat cycles on the table lift and running it through the gears and then cooling to stone cold. It sat overnight and I had a small bit of oil on the bottom of the motor. Initially after doing some searching around, it seemed likely that I had bad oil pump gaskets etc.  Others with new Ultimas had said that was their issue.

I took off the cam chest cover and the oil pump. I install the new gaskets and keys etc. Made sure that my pinion, cam and breather were all in alignment as they should be. Got it all back together and pulled the plugs again and cranked, and cranked, and cranked some more. NO OIL PRESSURE! Or at least the oil light was still on.

Thinking that I may have done something inside to the gears/keys etc, I tore it all back down again yesterday. The shaft key in the cam chest was in and driving the pump shaft. The two pump gear keys were also in etc. I did not tear into anything further the first time other than gaskets. I did however replace the lip seal in the pump between the pressure and scavenge chambers on the first tear down.

I bought more new gaskets this afternoon and this time at the only place that had them, had them as a kit from S&S. I bought the kit and it came with the o-rings for the two relief springs, new springs, ball and slide along with keys and gaskets.

As I did NOT tear the pump down on the first go-around, I did this time. The soft spring and ball plug check valve was removed and it had a nasty o-ring that was ripped out the side and hanging out under the cap. At least I now know this was my original leak, not the pump gaskets. So after assembly lube on the drive shaft and on the keys, I put it all back together double checking that my drive keys were all in proper.

Oh, I also purchased a new oil pressure switch just in case. Before I took the pump down today for the second time, I hooked up my ohm meter to the oil pressure switch and I was hoping that when it started that the ohm meter would go from continuity to open.... But it did not. I pulled out the pressure switch and set my air pressure regulator to 10 psi and hooked up my ohm meter to the lead and the case. Without air, it showed continuity just like it should. While I hit it with 10 psi the continuity went south and the contact was open, just like it should. I tested the new switch I purchased today just in case and it functioned the same, so I put back in my original pressure switch.

I just cranked it over with the plugs out again and the oil light stayed on. I put the plugs back in and started it up for a few seconds, no oil pressure.

That's the long story. I had good pressure before I replaced the gaskets the first time and now two sets of gaskets and springs/checks etc, still no oil pressure.

I have hard line pump inlet line and that cannot get screwed up. I have my line out the bottom of the pump going to my filter and then the other filter line goes back to my oil pump for the return. This is exactly the same plumbing that I had on the initial pre-problem startup. During the most recent short engine run, I checked in the oil tank and no return oil. Before the very first tear down, I looked inside the oil tank and I had what I thought was a good return flow, not spraying with pressure, but flowing out of the return line into the tank.

I know that oil the feed line is clear as that's how I drained my oil tank this time for the tear down. The oil flowed from the end of the line freely, albeit a bit slow as my garage is only 60 degrees and its Harley 20w50 dino oil.

So what might my problem be?

Any thoughts?

Thanks in advance, your help is greatly appreciated.
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Dan

1976 FLH
2009 SERG Orange / Black
Board Track Racer Project, Ultima 113"/6spd
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Dan_Lockwood

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Re: Ultima EVO 113" No Oil Pressure
« Reply #1 on: February 19, 2021, 10:37:54 PM »

Just doing more research and I see that some guys have to prime their oil pump before it gets pressure.

They say to remove the spring and ball check and let it gravity flow up through the pump until it's at the top of the check ball galley.

I didn't have to prime the pump after the new motor sat for 12 years, just cranked it without the plugs and oil pressure came up.

I'll try to prime it tomorrow and let you all know.

Thanks.
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Dan

1976 FLH
2009 SERG Orange / Black
Board Track Racer Project, Ultima 113"/6spd
Dan's Car - Bike - Projects Photo Albums

johnsachs

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Re: Ultima EVO 113" No Oil Pressure
« Reply #2 on: February 20, 2021, 08:29:01 PM »

Just doing more research and I see that some guys have to prime their oil pump before it gets pressure.

They say to remove the spring and ball check and let it gravity flow up through the pump until it's at the top of the check ball galley.

I didn't have to prime the pump after the new motor sat for 12 years, just cranked it without the plugs and oil pressure came up.

I'll try to prime it tomorrow and let you all know.

Thanks.
I always prime the pump[ like you describe, anytime I have the pump off, or on a rebuild. Just be sure your lines are on the pump in the proper orientation.
John
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Dan_Lockwood

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Re: Ultima EVO 113" No Oil Pressure
« Reply #3 on: February 21, 2021, 11:17:36 AM »

I always prime the pump[ like you describe, anytime I have the pump off, or on a rebuild. Just be sure your lines are on the pump in the proper orientation.
John

Thanks John!

I used assembly lube when I put it all back together and didn't think I would have any issues. I ended up priming the pump and warming up my feed line to at least get the first bit of oil flow good enough to stay primed. I pulled the plugs and rolled it over with the rear tire for a few minutes and the oil light went out. I started it up and the light was still out, but I didn't have any return flow. I let it run for about three minutes and the return started to spurt a bit and then became a good flow.

It's a gravity feed system and I didn't think I should have any issues.  You can see that the tank is higher than the oil pump by quite a bit.



So all is good NOW!

Thanks again.
« Last Edit: February 21, 2021, 11:20:51 AM by Dan_Lockwood »
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Dan

1976 FLH
2009 SERG Orange / Black
Board Track Racer Project, Ultima 113"/6spd
Dan's Car - Bike - Projects Photo Albums

Twolanerider

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Re: Ultima EVO 113" No Oil Pressure
« Reply #4 on: February 21, 2021, 03:00:07 PM »

That's a slick looking bike Dan.  Just caught this thread and this of your several projects.  I once many moons ago had an Evo I was messing with that also didn't want to pick up oil pressure after the work.  In my case, however, it was a loose nut behind the wrench issue as I'd got in a hurry and not kept the oil lines straight as John mentioned above. That was a mistake I only made once though.  Good to read you got yours sorted.  Can't wait to read ride reports after weather clears and it hits the street.
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johnsachs

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Re: Ultima EVO 113" No Oil Pressure
« Reply #5 on: February 21, 2021, 05:12:33 PM »

Nice piece. Enjoy.  :)
John
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