Ram U cup seal

[Myjacksux]

Hi, this is my first post. I am trying to replace the Ram O ring with a U cup seal since the O ring spacer is cracked and apparently no longer available. I bought the jack used and unfortunately don't know the model number. The jack looks identical to the jack shown in the rebuild tutorial. Here are the measurements from the Ram .. OD is 42mm, ID is 33.67 mm and heigth is 5.4mm. The hcrcnow web-site shows a 32X42X5.6 seal. Would this be the correct replacement ?

 

[jacked_72]

You might do better to post this in the jack tutorial thread. Although it is long, it still gets a lot of traffic. There is also a fair amount of discussion about how and where to measure seals. Also, discussion of whether you can easily replace the oring with the ucup seal. Generally, you want something that will hold the ucup to the ram (such as a grove in the ram and a cir ciip) otherwise the seal can come off the ram if you extend the ram by pulling on the jack arm.

Edit: this is the thread you want:http://garagejournal.com/forum/showthread.php?t=51105

 

[Myjacksux]

Thanks for your help. It appears the thread you listed is closed. I read most of the jack tutorial thread especially how to measure seals and found the thread very helpful. I did measure properly for the U cup seal replacement and a groove already exists on the Ram that will accept a U cup seal. No machining of the Ram is needed for a spacer or washer install since there is no lip that would have to be removed. The groove length is 5.4 cm. so this should accommodate a 5.4 cm heighth seal. I will follow your advice though and try to post this in an appropriate jack tutorial thread. Thanks

 

[Myjacksux]

Can I add my above post to the thread by going to the last page 45 and clicking on Post Reply ? Thanks

 

[LB-1911]

Thanks for your help. It appears the thread you listed is closed.

I read most of the jack tutorial thread especially how to measure seals and found the thread very helpful. I did measure properly for the U cup seal replacement and a groove already exists on the Ram that will accept a U cup seal.

I will follow your advice though and try to post this in an appropriate jack tutorial thread. Thanks

Here you go -

Overseas Jack Rebuild Help Tutorial.
http://garagejournal.com/forum/showthread.php?p=6008024#post6008024

 

[Myjacksux]

Thanks. I also see why I would need a circlip.