Hydrolastic displacer unit hose leak

robbyasti · Post by **robbyasti** » Sat Mar 15, 2014 7:01 am

I am restoring a 1968 Innocenti Mini MK2. I attempted to fill the hydrolastic system and soon realised that there is a leak from to top hose of one of the front displacer units. I think it is coming from the top joint/hose of the unit.
Do I need to remove the unit to repair it? Can anyone please tell me the best way to remove the displacer unit?
Thanks
Rob

Post by **rolesyboy** » Sat Mar 15, 2014 12:30 pm

Hi, yes you will have to remove the unit. I believe Tim Harber from Minimail repairs Hydro units now. Always found him very good to deal with for other Mini spares and advise. He is in Gloucester if you google him. Cheers. Mark

robbyasti · Post by **robbyasti** » Sat Mar 15, 2014 1:51 pm

rolesyboy wrote:Hi, yes you will have to remove the unit. I believe Tim Harber from Minimail repairs Hydro units now. Always found him very good to deal with for other Mini spares and advise. He is in Gloucester if you google him. Cheers. Mark

Hi Mark, thanks for the info.

Rob

mk1mini · Post by **mk1mini** » Sat Mar 15, 2014 11:23 pm

I had this very same issue last year , I removed the displacer and sent it to "mini mail" they can do an exchange and sent you a reconditioned original . the only difference is the new hose is rubber and not covered in the braid but this didn't bother me . I think it was £100 I paid and it was back together. http://www.minimail.co.uk/

Most of the leaks are the hose end in the centre of the displacer .

geroch · Post by **geroch** » Mon Jan 25, 2016 10:54 pm

Hi guys,
Hello guys,
I was looking to change the tubes of my hydrolastic.
That's how I after 50 years:

geroch · Post by **geroch** » Mon Jan 25, 2016 11:25 pm

Now the question:
what type, thread and size has the fitting unit?

its a BSP?

Post by **Ronnie** » Mon Jan 25, 2016 11:27 pm

JIC - UNF.

geroch · Post by **geroch** » Tue Jan 26, 2016 12:08 am

Ronnie wrote:JIC - UNF.

Jic? are you sure?

JIC female:

Post by **Ronnie** » Tue Jan 26, 2016 10:14 am

5/8 UNF thread? but not the female at that end I will have to check

Post by **Ronnie** » Tue Jan 26, 2016 4:55 pm

Hi! As noted previous post the thread both sides of the hydrolastic adaptor is 5/8 UNF (NPT) a brief search on the net I can't find the fitting you require

but I think you will find that it will be a SAE 45 degree which uses the 5/8 thread form where as JIC does not.

Just goes to prove you are never to old to learn, and you can learn something every day.

Post by **STG95F** » Tue Jan 26, 2016 5:31 pm

Question , Do the pipes unscrew from the displacer end as well ? or how are they fixed ?

Dan Tweed grey · Post by **Dan Tweed grey** » Tue Jan 26, 2016 5:46 pm

They are crimped.

Post by **STG95F** » Tue Jan 26, 2016 5:54 pm

thank you

geroch · Post by **geroch** » Tue Jan 26, 2016 6:14 pm

Thanks Ronnie, is just not stop learning.
as you can see from photos of elbow, I think the part of the piping in front/rear, is JIC UNF.
While the hose unit is BSPP, it's possible? I know nothing of pipes and fittings.

Post by **Ronnie** » Tue Jan 26, 2016 6:16 pm

NO they are both 5/8 UNF threads
SAE:
Society of Automotive Engineering. The male fitting that you require appears to be rather obscure!!

geroch · Post by **geroch** » Tue Jan 26, 2016 9:13 pm

thanks

i measured elbow thread... in 1", 18 theet, Major diameter about 15.6 mm... its UNF 5/8"....

but it's an inversed JIC, definitely not is 45°...

geroch · Post by **geroch** » Tue Jan 26, 2016 9:14 pm

rest...

Post by **mab01uk** » Sat Jan 30, 2016 10:15 am

Some useful methods, photos and advice here:-

Re-hosing the hydrolastic displacers:
"There are rubber reinforced hydraulic hoses that are crimped onto the fitting that rise out of the tops of the Hydrolastic Displacer Units at the front and the rear of the car. If the hydrolastic suspension system's rubber hoses fail, all is certainly not lost and there is absolutely no need for panic."
Scroll down:
http://members.tripod.com/austin_america/id63.html

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Hydrolastic displacer unit hose leak

Hydrolastic displacer unit hose leak

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