heymccall
Senior Member
Your thumb fittings are SAE, but, your JCB will, most likely, be all British, and some places may even use dowty seals.
An SAE kit will only help on your thumb plumbing.
As for durometer, 90 is the standard for hydraulics, and you have to search to find anything different.
An SAE kit will only help on your thumb plumbing.
As for durometer, 90 is the standard for hydraulics, and you have to search to find anything different.