Please confirm... Real time and 3rd try PS pump rebuild (1 Viewer)

[bdruff]

this part solved. This is the missing O-ring that sometimes people miss. I was one of them. It's about the size of a half-dollar. The old O-ring fell apart when I did find it and pulled it out.

I was confused as to where it went at first. It is in the first plate, on the back side, and sits in a groove. When you pull the plate out, flip it over and you'll see it on the inside wall.



The second picture just shows where I thought it might go. It does not go there.

 

[bdruff]

diagram from the gates rebuild.

 

[bdruff]

This picture shows the O-ring sitting on the plate. It goes on the other side of that plate.

 

[bdruff]

Noticed the inside of the pump showed signs of wear. Grooves were worn and there were some sharp edges on the plate above the vanes that didn't look like it was machined that way. Also found a hair line fracture in the groove where the "missing O-ring" was. It was enough that the metal was lifted causing a larger groove in that area.

 

[blkprj80]

On mine, the o-ring was "inside" a bore, in a groove. Since it was rock hard, it was hard to see for sure as it was flattened out. Where most of the o-rings are on the outside, this one was inside. I.e., you would need to be standing inside the pump to see it, which you probably can't do. I used a dental pick to get it out.

When you find it, you'll say "damn, that's the one everyone misses".

I'm not 100% sure, but I think it's the 2nd from smallest sized one in the pic. The smallest one I think went on the tube that is held on by one bolt at the bottom of the pump.

You could try to PM Robbie (powderpig) and he might be able to tell you exactly where to look. He's pretty busy with flood cleanup I imagine, so he may not get back to you quickly.

Good Luck, and post back what you find. Pics are helpful, and I'm sorry I didn't take a picture of that one stupid o-ring.


EDIT: Found a pic that might have where that o-ring hides... I think it's at the bottom of the hole in the pic. Try looking there. You can barely see the edge of it in the picture. Again, I'm not sure this is it, but it's on an inside bore like that.

 

[Romer]

Not sure if you looked at the power steering pump section of the FAQ, this thread linked there might help you around post 11

https://forum.ih8mud.com/ca-jefferson-state-cruisers/467550-fj80-lx450-ps-pump-rebuild.html

 

[blkprj80]

Okay, that's it! I thought it was harder to find than that.
Thanks Romer! That should get him going.

 

[bdruff]

Thanks guys... I did find it. It was rock hard and was obvious.

I put it all back together and bled it. It worked good... no more bubbles, no froth. I drove around the block and it felt good. No leaks after about an hour.

Drove to town and about 2 miles down the road it started whining again.

Popped the hood... fluid everywhere. frothed up fluid in the reservoir.

Made it home with it whining all the way.

Parked and frustrated. It's the same symptoms. Going back to check all my bolts but think a new pump might be in order.

 

[bdruff]

bookmarked

Not sure if you looked at the power steering pump section of the FAQ, this thread linked there might help you around post 11

https://forum.ih8mud.com/ca-jefferson-state-cruisers/467550-fj80-lx450-ps-pump-rebuild.html

Thanks Romer... I think I've read every thread on mud about power steering.

Have that one bookmarked, it's the one that finally showed me where the missing o-ring went

 

[snobdds]

Make sure your high pressure hose is not collapsing under high pressure or has any nicks or holes in it...

 

[bdruff]

Its a new high pressure line...and I used a flare wrench to tighten it.

Low pressure lines were replaced too.

 

[bdruff]

different pump/ same problem

I sourced a pump from a guy I know parting a LC out. I had nicked the gear and it was ticking a little otherwise I would have just got a new pump but his was cheap and came with the gear (and the high pressure line which was a gates replacement)



I debated on whether to tear it apart and use the O-rings from my pump since I just bought the rebuild kit and new bearing.

The back of the pump also shows some seepage and I'm not sure how bad it will be when it's on.



I decided to just bolt it up to eliminate any possibilities that I'm putting the pump together incorrectly. The less steps the better at this point and I can always go back and use the O-rings later. I just need to get it on the road.

I've been bleeding the system for a while but from what I can tell, I have the same problem!

Where in the world can I be sucking in air? High pressure line from the reservoir is tight at both ends. Used a flare wrench to put the new line in the gear box. New low pressure lines. I just don't know what else it could be...

It's the worst when I shut the engine off. Fluid seems to spurt from the reservoir like a volcano.

 

[bdruff]

After a lot of bleeding, and tightening some of the clamps... all seems to be working. I'll drive it and watch the back of the pump.

I'm going to post all the links I have regarding this job. Pretty easy to take the pump and lines down now. I've done it a few times. The first time was pretty difficult. There was a ton of helpful information scattered in different threads: parts numbers, diagrams, pictures, torque specs, bolt sizes, ways to overcome some of the obstacles. I saved them all and if no one minds... I'll post it in the FAQ thread. Wealth of knowledge here.

 

[Kernal]

Assuming the pump is working properly, wonder if it would be worth the trouble to only replace the O-ring at the rear of the pump, leaving the rest alone??

 

[bdruff]

Sad to report. Drove fine for about 15 miles. Then a whine...wet reservoir. It looks like the level is low again.

Might need professional help

 

[Romer]

clean everything off and run it in your garage continually looking for where the leak is. I had a similar problem and it ended up being where the hose connected to the gear box, but until you know the exact spot it is leaking, it is hard to help. Once you identify it should be pretty easy

BTW where are you located

 

[bdruff]

Thanks Romer. ..I'm in Fresno California. I'll be able to work on it more tomorrow evening. I can see it coming out of the reservoir. I don't think its leaking anywhere else. It does it very hard when I shut the engine off.

Whine wasn't bad. Topped off with fluid and it went away. Reservoir still has a puddle on top. I suspect the whine will be back and fluid low after next test drive.

Ill keep working on it and posting what I find. I know Its vague but I can answer questions.

I replaced the high pressure line and double checked that the fitting was tight both at the gearbox and the 5/8 line from the reservoir to the pump. I did use the old clamps for the 3/8 lpw pressure line but I wrapped some tape around the hose ends and they feel tight. Just throwing out possible weak points.

The forum is always a lot of help. Most of my questions have been answered in other threads but I still haven't been able to figure it out.

 

[Romer]

coming out the resv on the top? Maybe your cap isn't sealing? Coming out the resv on the bottom, maybe your hoses are not clamped down or have a leak

 

[bdruff]

Just an update hoping somebody will read it and say...I know exactly what is going on.

This morning, as expected, big time whine, overflowing from reservoir.

I opened the cap with the engine running and it was bubbling an inch above the reservoir and covering everything.

This is the original symptom that led me to new lines and reseal kit.

I didn't put anything on the high pressure line threads into the gear box. Threading felt good both times.

When I took off the new high pressure hose off the second time. ..I broke it and had to get another new one.

So two different high pressure hoses...three if you count the original, two different pumps...and all exactly the same symptoms.

Both times when I put it back together it worked for about 10 miles and then started whinning.

 

[Romer]

could be a loose cap or the seal on the bottom of the cap isn't holding. This is a pressurized system and the cap should not allow an over flow.

I had to replace mine, They are not expensive. Call your local Toyota dealer and see if they have one and pick it up on the way home

Also sounds like there is still air in your system