Bearing buddies-what am I doing wrong?

[backhoe]

Have just been doing some trailer maintainence on my 2 trailers. Bearing buddies on one filled up with grease fine. On the other one when the bearing buddy is off the hub the grease pumps through the nipple freely. When I put it on the hub I can't get any grease through the nipple ?because of back pressure.
I'm sure it's probably something simple I have done but can't work out what is going on.
Has anyone had this problem before?
How do I fix it?

Hopefully someone has an idea
Thanks in advance
Kev

[revs57]

Hmmm, tricky, ...only thing I can think of is that it could be either the spring or the sliding section that the grease nipple is in is jammed - that way, you could pump grease through it when it is off, but if the spring or plate is jammed, it wont allow you to pump grease in because of the build up of pressure in the hub.

I'd pull the bearing buddie off and try to compress the spring and check the centre section will actually move and compress the spring

Cheers

Rhys

[CROOZY]

Hi Kev, Never had that prob myself, maybe fill the buddy with grease first to elliminate as much air as possible. Is it a genuine "Bearing Buddy" or the a lesser quality imitation ?.. just thinkin allowed,
Cheers Phil