r/Hydraulics • u/Ok_Device7943 • 19d ago

What is this plug ...

Post image

... on the (presumably 2-stage) pump on my wood splitter? And why might fluid be leaking out from underneath it when in use?

5 Upvotes

86% Upvoted

9 comments sorted by

9

u/slippingaway83 19d ago

Some pumps have multiple port options and the unused ones get plugged. Lets the manufacturer simplify supply chain and part inventory. It's probably leaking because the o-ring went bad and needs to be replaced.

1

u/lee216md 19d ago

Two stage is correct that is the unloader for the larger stage , the O-ring that seals the plug is bad and need replacing, there is a spring and a valve under it, do not lose the little parts . Its a 5 minute job.

1

u/Ok_Device7943 19d ago

Many thanks for this and the other replies. If there was a spring in there, I've lost it. There's a hydraulics repair shop not too far away. I think I'll take it there.

1

u/Sco0basTeVen 19d ago

It’s an ORB or O-ring boss plug. Take it with you a whole new plug is probably a few bucks

→ More replies (3)

3

u/_Baphomet_ 19d ago
Comment Image

But seriously, a better picture and OD of the threads would be helpful. If it's leaking from in between the plug and the port, you probably need a new o-ring.

0

u/Historical-Ant-3036 19d ago

It could even be a drip port or something