V70 Brakes: - Red brake servo booster seal from Poland - Page 2

oragex · Nov 19th, 2020, 21:44

The URO seal came with a little dielectric silicone grease. It feel sticky but I tested it in the freezer and it stays quite fluid. I'd make sure it's 100% synthetic, I believe the seal is made of regular rubber, non resistant to petroleum products, so anything that has petroleum to it will cause the seal to seal and fail quickly

leswindeler · Nov 20th, 2020, 06:53

I fitted a new seal, the red type, just a couple of weeks ago. I had read that it could be done in situ, but believe me, that's impossible in my opinion.
Fitting the seal was a real pain and had to be done a fraction at a time using a large flat blade screwdriver to force it in.
Getting the servo out was another tricky part, although mine is LHD so no need to lower the engine.

I did try putting more lubricant on the shaft before changing the seal, but that didn't work.

Anyway, the new seal works and it's happy days with no hissing now.

BlueRubber · Nov 20th, 2020, 10:57

Quote:

Originally Posted by leswindeler

I fitted a new seal, the red type, just a couple of weeks ago. I had read that it could be done in situ, but believe me, that's impossible in my opinion.
Fitting the seal was a real pain and had to be done a fraction at a time using a large flat blade screwdriver to force it in.
Getting the servo out was another tricky part, although mine is LHD so no need to lower the engine.

I did try putting more lubricant on the shaft before changing the seal, but that didn't work.

Anyway, the new seal works and it's happy days with no hissing now.

What lubricant did you use with your seal?

Myself and the OP both fitted the same red seal and it worked fine until now .... a year later.

AussiePete · Nov 20th, 2020, 21:11

Hi Everyone

The red seal from Poland is made from silicone rubber. We are all only in search of 1 answer.

What is the most appropriate lubricant for silicone rubber?

I'm sure this forum's membership has the depth of knowledge (retired organic chemists, engineers etc.) to answer this question. I'm not an expert forum user. Can someone help to put this question to the forum's wider readership?

Thanks
P.

oragex · Nov 20th, 2020, 22:05

Quote:

Originally Posted by oragex

The URO seal came with a little dielectric silicone grease. It feel sticky but I tested it in the freezer and it stays quite fluid. I'd make sure it's 100% synthetic, I believe the seal is made of regular rubber, non resistant to petroleum products, so anything that has petroleum to it will cause the seal to seal** and fail quickly

**petroleum grease will cause the seal to swell. I also tried PTFE silicone grease (volvo genuine one), but felt in cold winter days it was getting too 'stiff', and replaced it with dielectric silicone synthetic one

leswindeler · Nov 23rd, 2020, 17:03

Quote:

Originally Posted by BlueRubber

What lubricant did you use with your seal?

Myself and the OP both fitted the same red seal and it worked fine until now .... a year later.

Hi. I used the tube that came with the seal. I'm sure it was the PTFE type.

BlueRubber · Nov 23rd, 2020, 17:07

Quote:

Originally Posted by leswindeler

Hi. I used the tube that came with the seal. I'm sure it was the PTFE type.

Did you fit the red seal from Poland and if so, how long ago did you fit it?

leswindeler · Dec 1st, 2020, 17:07

Quote:

Originally Posted by BlueRubber

Did you fit the red seal from Poland and if so, how long ago did you fit it?

Hi. Sorry for the delay. I fitted it about 4 weeks ago. Still working as it should.

BlueRubber · Dec 1st, 2020, 17:12

Quote:

Originally Posted by leswindeler

Hi. Sorry for the delay. I fitted it about 4 weeks ago. Still working as it should.

Thanks for the update, it seems people start having problems with these seals after 1 year.

AussiePete · Nov 9th, 2022, 02:20

The Polish replacement gasket has failed. See attached pic. The gasket has split.
Do not waste your time with these aftermarket solutions.
Mega stress during fitting; mega stress during subsequent gasket failure after a year or so.

Better to fit a complete new/used servo unit.
Engine will need to be dropped by 10 cm. Approx. 4 hours labour. Sounds worse than it is.
Peace of mind.

Cheers P.

Nov 19th, 2020, 21:44	#11
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	The URO seal came with a little dielectric silicone grease. It feel sticky but I tested it in the freezer and it stays quite fluid. I'd make sure it's 100% synthetic, I believe the seal is made of regular rubber, non resistant to petroleum products, so anything that has petroleum to it will cause the seal to seal and fail quickly __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c Last edited by oragex; Nov 19th, 2020 at 21:46.

Nov 20th, 2020, 06:53	#12
leswindeler Junior Member Last Online: Nov 15th, 2021 10:05 Join Date: Mar 2007 Location: Cigne	I fitted a new seal, the red type, just a couple of weeks ago. I had read that it could be done in situ, but believe me, that's impossible in my opinion. Fitting the seal was a real pain and had to be done a fraction at a time using a large flat blade screwdriver to force it in. Getting the servo out was another tricky part, although mine is LHD so no need to lower the engine. I did try putting more lubricant on the shaft before changing the seal, but that didn't work. Anyway, the new seal works and it's happy days with no hissing now. __________________ 2001 V70 2.4T + BSR stage 1, 18" Pegasus wheels, Chrome/Black mesh grille, lowered 30mm, Black Diamond slotted & drilled discs. Predator Pads.

Nov 20th, 2020, 21:11	#14
AussiePete Junior Member Last Online: Nov 18th, 2023 04:36 Join Date: Nov 2011 Location: Adelaide	Suitable lubricant for silicone rubber? Hi Everyone The red seal from Poland is made from silicone rubber. We are all only in search of 1 answer. What is the most appropriate lubricant for silicone rubber? I'm sure this forum's membership has the depth of knowledge (retired organic chemists, engineers etc.) to answer this question. I'm not an expert forum user. Can someone help to put this question to the forum's wider readership? Thanks P.

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