Power Steering Pump Return Hose Part Number?

[Lavaone]

Prepping to replace the short power steering return hose on my 1994 E500, I first read Gerry's writeup and then RicardoD's posts on replacing the short return hose. I used Ricardo's parts list and everything arrived today.

However, the 15mm hose I ordered from FCP Euro using the 006-997-09-82 part number looks to me to be too narrow (ID).

I received a Cohline numbered as follows: Cohline -2192 . .0310-4, 5x10, 5->NBR/CR<41-37/21 WP 6 bar.

So narrow a golf tee can't be inserted.

Pic attached

What is the proper hose designation?

Thanks in advance,

Charlie L.

 

[gsxr]

The hose in your photo is 4.5mm ID, 10.5mm OD... that's the wrong stuff. Part number 006-997-09-82 is correct, it loos like FCP messed up and sent the wrong hose. You need 15mm ID.

 

[Lavaone]

Prepping to replace the short power steering return hose on my 1994 E500, I first read Gerry's writeup and then RicardoD's posts on replacing the short return hose. I used Ricardo's parts list and everything arrived today.

However, the 15mm hose I ordered from FCP Euro using the 006-997-09-82 part number looks to me to be too narrow (ID).

I received a Cohline numbered as follows: Cohline -2192 . .0310-4, 5x10, 5->NBR/CR<41-37/21 WP 6 bar.

So narrow a golf tee can't be inserted.

Pic attached

What is the proper hose designation?

Thanks in advance,

Charlie L.

Should I be looking for a Cohline high pressure hose designated as 15x23-3?

The hose in your photo is 4.5mm ID, 10.5mm OD... that's the wrong stuff. Part number 006-997-09-82 is correct, it loos like FCP messed up and sent the wrong hose. You need 15mm ID.

Thanks, I see a few options from Cohline. I also realize this is a low-pressure line.

I am very curious, how did you get 4.5mm/10.5mm from the number sequence shown on the hose? I've tried Google'ing "hydraulic hose specification stamps on hose" but got basically nowhere.

 

[gsxr]

Should I be looking for a Cohline high pressure hose designated as 15x23-3?

Possibly, but I'm not certain. I normally use the Mercedes part number and don't often need to worry about the markings on the hose itself.

I am very curious, how did you get 4.5mm/10.5mm from the number sequence shown on the hose? I've tried Google'ing "hydraulic hose specification stamps on hose" but got basically nowhere.

I believe it's the highlight portion here...

Cohline -2192 . .0310-4,5x10,5

Sure looks like this indicates 4.5mm ID and 10.5mm OD. You can measure to confirm.

 

[Lavaone]

Doooh. As an easily baffled 'mercan I overlooked the European standard use of a comma "," as a unit separator in numbers whereas our standard is to use a period ".".

I should know better having worked for Bull out of Paris for a number of years (a number of years ago) and wrote everything numeric using the comma.

 

[Lavaone]

I should have asked this earlier: what are the appropriate replacement hose clamps? Iv'e read the advice on using four.

Any advice on clamp length, width and even manufacturer?

Again, thanks you n advance.

 

[gsxr]

You may be able to re-use the original clamps if they are undamaged. The OE clamps (typically Norma) are very good quality. I only use 2... there is very little space to fit 4 while still clamping on the tube instead of the raised barb. Make sure the clamps are TIGHT. It is difficult to access them after installation.

 

[Lavaone]

Thanks, certainly not a job I want to do twice. I know all too well. My tag line should read "If you take something apart and put it back together enough times you'll have two of them."

 

[emerydc8]

You may be able to re-use the original clamps if they are undamaged. The OE clamps (typically Norma) are very good quality. I only use 2... there is very little space to fit 4 while still clamping on the tube instead of the raised barb. Make sure the clamps are TIGHT. It is difficult to access them after installation.

Dave is right about double-clamping--at least on the bottom. The raised barb around the tip of the pump inlet nipple doesn't leave much room for two clamps, although I do have a total of four clamps on my other car from years ago and it hasn't leaked. I don't think the second clamp on the bottom is doing anything for me. It might help on the top under the reservoir.

I just did this job (short hose) because it was leaking due to a lower hose clamp failure. It started leaking in the cold a few months ago and when I tried to tighten the clamp it failed. It didn't look like a factory clamp so that might explain it. I didn't have a match for the upper clamp, but when I checked the EPC and my spares, I had a nut-and-bolt type clamp, part # 005 997 45 90. It turns out that this is what the EPC calls for anyway (see pic of assorted hose clamps). I used this for the bottom clamp and just reused the upper clamp.

Don't forget the aluminum sealing ring that goes between the nipple that bolts down through the reservoir and into the top part of the short hose, part # 007 603 020 100.

 

[Lavaone]

So I contacted FCP Euro about the 4.5mm x 10.5mm hose they shipped me, 006-997-09-82 and spoke with their CS folks. Explained that parts call out is wrong and please send me 10mm x 23mm hose. We discussed the fact that nowhere is 10mm x 23mm stated in any docs. I explained the specific circumstances but I might as well have been talking to the wall. To paraphrase, I was basically told that they would not go into the warehouse and pull a part that is not the correct part for my vehicle per their connection into the dealer parts network and that I am asking for the wrong part. No satisfaction whatsoever.

Not the first issue I've had with FCP Euro but it is for sure the last one!

 

[gerryvz]

I had two clamps at both top and bottom and honestly, after some years I didn't see the benefit of it. I think having a single clamp is fine, and just keep snugging it a smidge every couple of years.

 

[gsxr]

So I contacted FCP Euro about the 4.5mm x 10.5mm hose they shipped me, 006-997-09-82 and spoke with their CS folks. Explained that parts call out is wrong and please send me 10mm x 23mm hose. We discussed the fact that nowhere is 10mm x 23mm stated in any docs. I explained the specific circumstances but I might as well have been talking to the wall. To paraphrase, I was basically told that they would not go into the warehouse and pull a part that is not the correct part for my vehicle per their connection into the dealer parts network and that I am asking for the wrong part. No satisfaction whatsoever.

Not the first issue I've had with FCP Euro but it is for sure the last one!

Ugh. Sometimes you have to dumb it down for them.

​

"My part number is correct. Either your warehouse person pulled from the wrong bin, OR the wrong item is in the bin. Either way, ths is YOUR error. Full stop. Won't do it? Please put your supervisor on the phone. I'll wait. Thank you."​

 

[gerryvz]

Not the first issue I've had with FCP Euro but it is for sure the last one!

I had a big issue with them some years back, I think I documented it here on the forum. To their credit they did reach out to me privately and try to make it right. After a hiatus of some years, I have made a few orders with them in the past few years, generally to my satisfaction. They do tend to tout that they pride themselves on their customer service, so I would try to call them and talk to a supervisor or the owner to see if you can get some resolution on what should be a pretty simple and cut-and-dried matter.

 

[GRAEME JOHNSON]

Great picture with the hose clamps and part numbers
Very usefull for other people thank you
Graeme Johnson

 

[kwontumspeed]

As others have noted, the key here is to retighten the clamps especially shortly after installation but also recheck while already in the engine bay (oil change, etc).

My clamp bolts are now orientated for easier access without much difficulty.

This was all due to discovery of a standing puddle of fluid where simple gravity emptied the reservoir with a loosened clamp. The whole reservoir “system” was repaired about a year ago (<500 miles). Luckily it happened when parked.

 

[Lavaone]

Ugh. Sometimes you have to dumb it down for them.

​

"My part number is correct. Either your warehouse person pulled from the wrong bin, OR the wrong item is in the bin. Either way, ths is YOUR error. Full stop. Won't do it? Please put your supervisor on the phone. I'll wait. Thank you."​

I did file on online support request and am awaiting their response, if any.

I also responded to their customer survey pointing out my dissatisfaction.

I'm giving it another day as their premise is typical response within 24-48 hours. I'm not holding my breath . . .

 

[nocfn]

They respond....

 

[Lavaone]

So, I’ve been taking things apart while awaiting my low pressure hose to arrive and I have to say, this is a beast of a job, especially for an old thick fingered guy. My most used tool is the claw/magnetic pickup tool.

I’ll admit I got about 1/2 way through and panicked, putting everything back together while I still could, and went upstairs to calculate the cost of PS fluid if I purchased it in volume. After a bit of self-flagellation, I went down to my garage and got back at it and started over again.

That hidden bolt on the shroud bottom right was a $&@&$ - on my 1994 E500 under the shroud there also pass two narrow hoses at the same location. I had to pull apart a 7” long 3/8 drive long ball headed hex socket, discarding the ratchet attachment end and using only the 6” straight hex key. This I flipped around so the ball end was no longer the business end and poked this around for about 25 minutes where I thought the bolt should be until I finally managed to insert it the bolt head. To this I attached a vise grip, gave a good twist and managed to break the bolt. What a PITA!

I also have an additional bracket above the return line on the reservoir that the pics don’t depict. Maybe a 1994 update?

Finish tear-down tomorrow.

Reverse when hose arrives.

Thank you for the reminders re: base gasket, o-ring and crush washer, I have those all on hand.

 

[emerydc8]

Are we talking about the short hose (approx. 1.5") between the reservoir and the pump? The small bolts at the bottom of the reservoir are female Torx. The threaded nipple that goes through the reservoir base to the short hose is a large male Torx. The other four bolts--two holding the reservoir onto the bracket and the two for the hard supply line flange behind it are 10mm. The only thing I used a hex/Allen for was to remove the plastic plug wire tray behind the reservoir to get at the two 10mm bolts holding the flange (supply line) onto the reservoir. You could probably get away without removing this tray but it was just easier for me to get back there with the plug wires out of the way.

 

[Lavaone]

Yes. The short hose.

Didn’t need to pull the tray.

 

[emerydc8]

Okay. I was just wondering what the hex was for.

 

[gsxr]

That hidden bolt on the shroud bottom right was a $&@&$ - on my 1994 E500 under the shroud there also pass two narrow hoses at the same location.

You are talking about the black plastic piece that surrounds the distributor cap and cam solenoid, right? Yeah, the hidden bolt is a PITA. The clear tube is a Tecalan vacuum line from rear of the intake manifold to the EZL, if this is old and brittle, now is the time to replace it. The larger (8mm OD) black tube goes from the purge valve on the driver fender, to the PCV hoses atop the intake manifold. Both are visible in the photo below.

Be careful with the black plastics, including the spark plug wire X-tray... all that stuff is NLA.

I had to pull apart a 7” long 3/8 drive long ball headed hex socket, discarding the ratchet attachment end and using only the 6” straight hex key. This I flipped around so the ball end was no longer the business end and poked this around for about 25 minutes where I thought the bolt should be until I finally managed to insert it the bolt head. To this I attached a vise grip, gave a good twist and managed to break the bolt. What a PITA!

The BOLT broke!!?? Wow... that's unusual.

I also have an additional bracket above the return line on the reservoir that the pics don’t depict. Maybe a 1994 update?

Can you post a photo of the bracket?


Note that with the PS reservoir off... this would be a convenient time to replace the cam advance solenoid, if it's leaking oil (and, if original from 1994, it's almost guaranteed to be leaking). I just did this on one of my cars a few months ago:

 

[emerydc8]

Be careful with the black plastics, including the spark plug wire X-tray... all that stuff is NLA.

I knew I should have bought a set of those x-trays a few years ago. The plastic distributor cap covers are still available, right?

 

[gsxr]

I knew I should have bought a set of those x-trays a few years ago. The plastic distributor cap covers are still available, right?

Nope. Both covers are NLA.

https://partssearch.mercedes-benz-classic.com/parts/A1191580285?tt=

https://partssearch.mercedes-benz-classic.com/parts/A1191580485?tt=

 

[Lavaone]

When wrote I broke the bolt I meant I broke it free so I could finger it out.

As expected, I did crack the old one but I ordered a distributor cover from Pelican last week. It arrived today. So that one is available.

Pic of bracket attached.

Got everything out earlier today. The old hose was stiff and brittle and the new hose is fresh and pliable.

 

[Lavaone]

One other item - releasing and pushing aside slightly the serpentine belt gave clear access to the clamps. I figured this out after first moving a 7mm socket on a 1/4” flex head ratchet 15 degrees at a time for 10 minutes.

These original MB clamps were not only fairly loose but disintegrated during removal.

 

[Lavaone]

I'll be dipped if I didn't drop the freaking crush washer down into the engine undercover. Note to self: remove that before starting any project to reduce the likelihood of dropping something into it. I could see tiny slice of the washer peeking out from just under the radiator area but when I slinked my grabber down I herky-jerked it completely under. Those covers should have been designed to kick the parts out to where you can at least spot them. Getting out the floor jack . . .

 

[Lavaone]

Nope. Both covers are NLA.

https://partssearch.mercedes-benz-classic.com/parts/A1191580285?tt=

https://partssearch.mercedes-benz-classic.com/parts/A1191580485?tt=

Just received yesterday the right side distributor cover from MB shown in the photo

 

[gsxr]

To clarify: Both covers are NLA from Mercedes-Benz dealership network.

Aftermarket part vendors (like Pelican) may have some remaining inventory on the shelf, as seen above... Pelican has some of the left cover available, but not the right cover.