Thanks for all the info.
Before replacing the seals, I tried to clean them first.
I used a Seal Mate, but now that I have it, I should have just crafted my own as Fire-medic suggested.
This is what the left side looked like.
This is the right. There was a little oil sitting on the seal and under the dust cover.
Not a lot of dirt came out with the Seal Mate.
This is under the left side cap. I guess they don't keep out the water.
There was zero pressure behind the Schrader valve.
After cleaning them up I set them to 11psi and put some grease on the rim of the cap to try and seal it better.
I did not check the oil level as we're in winter up here, so there's no rush.
There will be plenty of heat-cold cycles with the wood stove, so I'll see if there are any leaks over the next little while as there was before.