O-ring material for power steering hose

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05-01-2018, 03:12 PM
chromguy

O-ring material for power steering hose

I have a bad seal on a power steering pressure hose as the ring is chewed up. A google search did not help me determine a standard seal material.
I have plenty of nitrile orings (Buna-N) and a few of the green ones for HVAC. I would guess the Nitrile ones should be OK but thought I would check first

Normally, at work I use a Viton oring in nearly everything except for high temperature but I don't have Viton here at home.
05-01-2018, 04:43 PM
thedon809

Re: O-ring material for power steering hose

I would think nitrile is fine. Nitrile is pretty damn chemical resistant.
05-02-2018, 02:53 PM
Reaper1

Re: O-ring material for power steering hose

Is this on a ZF pump with the banjo?
05-02-2018, 05:05 PM
chromguy

Re: O-ring material for power steering hose

Quote:

Originally Posted by Reaper1

Is this on a ZF pump with the banjo?

Both my Sundance and CSX are Saginaw, Earlier today I picked one up at the dealer for the low price of $11 and change. On my way home I stopped by a local o-ring company that offered me three of these for free.
The experts at the oring shop determined these are a metric NBR oring 7.5 x1.5.
05-03-2018, 04:25 PM
Reaper1

Re: O-ring material for power steering hose

Ah. OK.

I keep having issues with the seal for the banjo on the ZF pump. I can't seem to get it to stay sealed. It's OK for a little while, then it just starts leaking like a busted pipeline. The original seal had a small tear in it, so I replaced it with an HVAC type seal that was very similar since I couldn't find the exact seal. I don't know if the material wasn't resistant to PS fluid or what...
05-03-2018, 04:48 PM
chromguy

Re: O-ring material for power steering hose

Quote:

Originally Posted by Reaper1

Ah. OK.

I keep having issues with the seal for the banjo on the ZF pump. I can't seem to get it to stay sealed. It's OK for a little while, then it just starts leaking like a busted pipeline. The original seal had a small tear in it, so I replaced it with an HVAC type seal that was very similar since I couldn't find the exact seal. I don't know if the material wasn't resistant to PS fluid or what...

Do you want me to check my ZF pump in storage for size?
05-03-2018, 06:07 PM
83scamp

Re: O-ring material for power steering hose

Quote:

Originally Posted by Reaper1

Ah. OK.

I keep having issues with the seal for the banjo on the ZF pump. I can't seem to get it to stay sealed. It's OK for a little while, then it just starts leaking like a busted pipeline. The original seal had a small tear in it, so I replaced it with an HVAC type seal that was very similar since I couldn't find the exact seal. I don't know if the material wasn't resistant to PS fluid or what...

There are two different types of seals on a ZF pump. There is an o-ring under the head of the banjo bolt, but a metal washer with a bonded inner seal under the banjo to pump surface.

I just replaced my lines, that's how I know...

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05-07-2018, 02:22 PM
Reaper1

Re: O-ring material for power steering hose

Quote:

Originally Posted by chromguy

Do you want me to check my ZF pump in storage for size?

Can you confirm what is said below? I don't ever remember seeing an o-ring on the under side of the banjo bolt (which makes sense).

Quote:

Originally Posted by 83scamp

There are two different types of seals on a ZF pump. There is an o-ring under the head of the banjo bolt, but a metal washer with a bonded inner seal under the bank to pump surface.

I just replaced my lines, that's how I know...

Sent from my LG-H900 using Tapatalk

Thanks! I think I'm missing the o-ring under the banjo bolt head.
05-07-2018, 03:00 PM
83scamp

Re: O-ring material for power steering hose

Quote:

Originally Posted by Reaper1

Can you confirm what is said below? I don't ever remember seeing an o-ring on the under side of the banjo bolt (which makes sense).

Thanks! I think I'm missing the o-ring under the banjo bolt head.

That's probably why you have a leak. There is definitely one there. Like I said, I just replaced the pump, lines and rack on my Daytona. Just to figure out my hard steering issue was a bound up U-joint on the column.... A bit frustrating, but now I know it's all new, and should be good for another 180K miles...:)
05-08-2018, 04:25 AM
Force Fed Mopar

Re: O-ring material for power steering hose

I was thinking there was 2 of those flat metal/rubber seals, one on each side. Might just be an o-ring on the top though...
05-09-2018, 03:25 PM
thedon809

Re: O-ring material for power steering hose

Quote:

Originally Posted by 83scamp

That's probably why you have a leak. There is definitely one there. Like I said, I just replaced the pump, lines and rack on my Daytona. Just to figure out my hard steering issue was a bound up U-joint on the column.... A bit frustrating, but now I know it's all new, and should be good for another 180K miles...:)

Saw my buddy replace a bunch of steering parts for a bad ujoint in a Chevy. I knew immediately what it was when I turned the wheel. Gets you the first time.
05-09-2018, 03:56 PM
83scamp

Re: O-ring material for power steering hose

Quote:

Originally Posted by thedon809

Saw my buddy replace a bunch of steering parts for a bad ujoint in a Chevy. I knew immediately what it was when I turned the wheel. Gets you the first time.

I'm just glad I'm not the poor guy I was behind at the parts store the other night. Not sure what he was working on, but it was GM and he needed a power steering line. It was special order, 2 weeks to get, and the line cost him over $100. Shoot, I replaced the pump, lines, and half the cost of the rack for that....

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