Armstrong Dampers

[Sleeper]

Dear All

Before I re-fit my dampers I'd like to get a better understanding of them....I know there are two pistons immersed in oil and each piston has a spring loaded valve ? , also a valve between the two .

Has anyone a good diagram of the workings , or even photos of the stripped units ?

Many thanks

John

[irmscher]

You will find some good ones on Google

[Sleeper]

Thanks
Yes, have found some,just need to know how the valves on top of the pistons function now..

damper pistons.JPG (52.72 KiB) Viewed 1644 times

John

[Sleeper]

Well,being a long standing Blue Peter viewer , just couldn't wait , so , out came the hacksaw....

2017_1110demperinternals0005.JPG (198.84 KiB) Viewed 1613 times

2017_1110demperinternals0003.JPG (200.37 KiB) Viewed 1613 times

2017_1110demperinternals0002.JPG (207.1 KiB) Viewed 1613 times

Note the two different pistons,one ( bump) with a seal and the other ( rebound ) without , in the next post.

John

[Sleeper]

last photo

2017_1110demperinternals0008.JPG (370.68 KiB) Viewed 1613 times

P.S 2 bleed holes removed shown in black from the bottom of the cylinders to the valve

Starting to understand it now...

I think the bump and rebound springs are labelled the wrong way round...

John

[geoberni]

Was that therapeutic for you?
You really are impatient to be spending the morning cutting one open when you only asked the question last night.
Nice job though, hopefully they'll prove useful to someone else too.

[Sleeper]

Yes, I like to get the job done....I am not long in this world.

There are on the crowns of the pistons ball valves held in place by fine coil springs , one assumes the pistons are only functional on the downwards stroke....

John

More to come as I get my head around them...

[Trickydicky]

Declan Burns provides a very good write up here, viewtopic.php?f=4&t=36349&hilit=Home+damper+repair

[Sleeper]

Richard

Many thanks , wonder why didn't I come across it during my searches ??

John

[Trickydicky]

Here is my version of replacing the seal, very loosely based on Declans method.
viewtopic.php?f=4&t=53062&hilit=Home+damper+repair

[Sleeper]

Richard
Thank you ,yours I managed to see before hacking mine apart , just to see the "workings" , when they start to leak I will try pressing the shafts out and re-sealing them...

Thanks to all.

John