Oscar the TJ gets a CUMMINS - Page 31 - JeepForum.com

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post #451 of 544 Old 07-17-2013, 11:10 PM Thread Starter
10-3-TJ
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After fighting with the vacuum and power steering pump I finally got it off. For those of you with this same setup, how much do you hate that stinking oil feed line to the vacuum pump.

That little booger is hard to get to. A midget with fairy hands wouldn't be able to get in there easily.

So the ps pump does not turn as easy as I thought I remember it turning and the return line had two VERY minor dents but does look like the return line was pushed against the ps housing.

So off to NAPA in the am.


"We have enough youth, how about a fountain of smart"

"Look no further than yourself, for all of the good and all of the evil that exist in this world, resides in the heart of man and his propensity to use it".
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post #452 of 544 Old 07-21-2013, 06:35 PM Thread Starter
10-3-TJ
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Okay guys I need some advice!!

I have replaced the pump,the gear box and blew out the lines. I still don't have any ps

What am I missing. I have checked the pump. Its pumping great.

How long would a ps pump take the bleed all the air out?

Any advice is greatly appreciated

"We have enough youth, how about a fountain of smart"

"Look no further than yourself, for all of the good and all of the evil that exist in this world, resides in the heart of man and his propensity to use it".
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post #453 of 544 Old 07-22-2013, 06:17 AM
youngjeeper11
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wierd.....

How do you know the pump is pumping? Do you still have good vacuum at the vacuum pump as well? The only thing I can think of is that you stripped the gear that turns the vacuum pump/ps pump? Maybe your Killer Dowel Pin let loose and fell into the gear?Maybe?

Is it possible something is binding in your steering linkage to make it seem like you dont have PS?

Just throwing ideas out there....

Jeep 1:Used to have a 93 YJ 2.5l- 3.5" Black Diamond, Chevy TBI 5.7l V8, SM 465 4 speed, 8.8 rear( 4.10, L/S), rhinoline, Mile Marker 9000, NP 231, Had to sell it due to college
Jeep 2: 89/91 YJ, 4BT Cummins, NV4500, NP 231, Old Man Emu 2.5" suspension lift, 1" body lift.....Runs and drives, but very much a project
Interned at Novak Conversions 2 summers ago

Ask me about my 4BT Cummins Motor Mounts!!
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post #454 of 544 Old 07-23-2013, 03:54 PM Thread Starter
10-3-TJ
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Youngjeeper

So I checked the vacuum gears and made sure the shaft which connects the vacuum to the ps pump is operational.


I can't figure out why I still don't have power steering. Does anyone know what the pressure at the pump should be. I have heard that a gauge can be put on the back of the pump.

The only thing I haven't replaced is the hoses and I am going to do that to rule them out.

I have heard of hoses collapsing which even under compressed air blows through fine, but fluid is restricted.

I dunno guys I am starting to get discouraged.

"We have enough youth, how about a fountain of smart"

"Look no further than yourself, for all of the good and all of the evil that exist in this world, resides in the heart of man and his propensity to use it".
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post #455 of 544 Old 07-23-2013, 04:30 PM
Vonguido
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Upgrade to hydro assist steering? What size tires are you running now?
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post #456 of 544 Old 07-23-2013, 05:08 PM
ThomasYJ
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Quote:
Originally Posted by 10-3-TJ View Post
Youngjeeper

So I checked the vacuum gears and made sure the shaft which connects the vacuum to the ps pump is operational.

I can't figure out why I still don't have power steering. Does anyone know what the pressure at the pump should be. I have heard that a gauge can be put on the back of the pump.

The only thing I haven't replaced is the hoses and I am going to do that to rule them out.

I have heard of hoses collapsing which even under compressed air blows through fine, but fluid is restricted.

I dunno guys I am starting to get discouraged.
I wish I could provide some better input, but don't give up. There's a solution to every problem, especially when it comes to stuff like this!

The Ho':93 YJ
The Housewife:'00 F250 7.3
Build: /f12/tons-cloaks-2-0-a-3062425/
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post #457 of 544 Old 07-23-2013, 08:29 PM
papitt
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I'm going to say go to 4btswaps.com .. lots of information over there. They really helped me when I was doing mine. There is a section there called cummins tech section. that where I'd go.
Have you had steering and just lost it or had you never had steering yet. When I pump P/S on my Bronco it was still gas. Mine worked a day or 2 & then I got something in a pressure valve . after getting it cleaned all was fine. That pressure valve on mine was the big nut that the hose screws into. Mine has a Saginaw pump. I found out later that valve is different in different cars & truck that us the sag.
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post #458 of 544 Old 07-23-2013, 09:46 PM Thread Starter
10-3-TJ
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Thanks for the suggestions. I am currently searching 4btswaps.com now. Tomorrow I am going to change the lines.

The more I think about it I wish I would have started there, but how many times has anyone on here had ps go out and go straight to the pump and that fixes it.

Unfortunately Oscar is so dang loud there would be ZERO chance of hearing a pump go bad.

I have searched on here about hydrolic assist on the steering but I also read how the assist can actually make the steering a little sketchy for on road driving. And since I drive on the highway a lot, I will Prolly sway away from doing that. Unless I can be convinced otherwise.

"We have enough youth, how about a fountain of smart"

"Look no further than yourself, for all of the good and all of the evil that exist in this world, resides in the heart of man and his propensity to use it".
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post #459 of 544 Old 07-24-2013, 06:06 AM
youngjeeper11
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It is a pretty simple system, and you will have replaced all the components in that system, so I have no idea why it would not be working, if the hose does not do it, I think your jeep has a curse haha.

Jeep 1:Used to have a 93 YJ 2.5l- 3.5" Black Diamond, Chevy TBI 5.7l V8, SM 465 4 speed, 8.8 rear( 4.10, L/S), rhinoline, Mile Marker 9000, NP 231, Had to sell it due to college
Jeep 2: 89/91 YJ, 4BT Cummins, NV4500, NP 231, Old Man Emu 2.5" suspension lift, 1" body lift.....Runs and drives, but very much a project
Interned at Novak Conversions 2 summers ago

Ask me about my 4BT Cummins Motor Mounts!!
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post #460 of 544 Old 07-24-2013, 09:09 PM
papitt
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... Funny you said the Cummins is so Loud .. Same here as my cooling fan has retired.. But 1st you have the Motor noise & then I have my lift pump mounted to the frame..3RD noise in mine is the cooling fan.
.. Winter I don't need the cooling fan but summer time I do need it. And I plan on a use of it that I'll need it for several hours at idle ..
.. Hope you get your P/S going.
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post #461 of 544 Old 07-25-2013, 09:49 AM
USMCHarleyJeepG
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nice build man
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post #462 of 544 Old 08-01-2013, 09:39 AM
Luke95
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Check the pump, is it similar to a cherokee?

I <3 rockrash

5.2 ZJ Pushing a dana 30 as far as it will go.
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post #463 of 544 Old 08-07-2013, 12:15 PM
ksilovich
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Quote:
Originally Posted by 10-3-TJ View Post
I have searched on here about hydrolic assist on the steering but I also read how the assist can actually make the steering a little sketchy for on road driving. And since I drive on the highway a lot, I will Prolly sway away from doing that. Unless I can be convinced otherwise.
Nothing wrong with hydro assist on the road. It practically acts as a really great steering stabilizer. I run my hydro assist on the highway and country roads doing 70 turning 40" of rubber.

Are you sure your not looking at full hydro set ups on the highway? Cause personally I wouldnt do that, but I know guys that do.

Jeffery 2.0 : Cummins 4bt, 40's, ORI's, D60, 14B, lots of AL
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post #464 of 544 Old 08-17-2013, 07:34 PM Thread Starter
10-3-TJ
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Okay fellas


We need to put on our thinking caps.

After replacing everything in the power steering and still no p/s I figured the pump must be at fault. Removed and installed a new p/s pump. Again no power steering even after bleeding.

I am starting to think there may be a issue where the p/s pump connects to the vacuum pump. I checked the vacuum pump when the engine was running and it had enough vacuum to hold the hose to my finger. I also have enough vacuum to run the HVAC controls and brake booster.

Guys I am stumped and this has to get fixed. If I had a stick of dynamite I would blow that sucker up.

"We have enough youth, how about a fountain of smart"

"Look no further than yourself, for all of the good and all of the evil that exist in this world, resides in the heart of man and his propensity to use it".
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post #465 of 544 Old 08-19-2013, 09:03 PM Thread Starter
10-3-TJ
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I think I am making headway.

Today I replaced the new gearbox with another gearbox. The jeep ran for an hour and fifteen minutes while I continued to turn the wheel. Even after that amount of time I was still getting a good amount of air out of the system.

I checked for leaks and have none. So I am assuming the air is coming from within the system.

So tomorrow I will continue with bleeding the steering and see what happens. The steering has gotten much much easier. I haven't yet put the front end down on the ground, figured I would wait until I was satisfied that the system was bleed.

"We have enough youth, how about a fountain of smart"

"Look no further than yourself, for all of the good and all of the evil that exist in this world, resides in the heart of man and his propensity to use it".
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