I joined up here with hopes you guys can help me figure out why this jack isn't working. It's a Matco AM200F 2-ton. When i got it i knew it needed rebuilding. So i ordered a rebuilding kit for it and got it all looking nice and new. However it's not working correctly. It lifts and lowers fine with no weight on it. However the pump plunger seal along with oil gets blown out whenever the jack has any weight on it. Not sure what's going on. Is anyone here familiar with these that can help. Thanks.
Matco floor jack... Need help
- Thread starter CoolKid
- Start date
rooster59
Well-known member
new U-seal? maybe in backwards? cracked? groove cleaned out? did a seal lip get folded back? that's what I would look at. open top of U goes toward pressure. nice jack
Last edited:
rooster59
Well-known member
I assume the outside of the seal fits into a groove in the jack body, piston goes through the inside of the seal.
No groove.the seal is just an oil seal / wiper. It presses in and sits flush just like the original. Under the seal is a plastic split-washer and an o-ring. No pressure should be going against these parts unless something else is wrong. But i have no clue what it could be.
PWC Repair
Well-known member
Somewhere down in there is a spring loaded checkball. If it's rusted and stuck the fluid just shoots out the plunger like yours.
Here are pictures of the diagram that came with the rebuilding kit. Every single piece that i removed i replaced with new from the kit. A,B, and C all pertain to the pump block holes.
