Miter mite vn 42 need help

[Rosienel8]

I have a miter mite vn42. V nailer and it is having issues. I was advised to replace the o rings in the brake cylinder as it was leaking. I did that. Then there was still an air leak coming from one of the silencers. I replace that. It still leaked. I was then advised to replace the vertical cylinder o-rings and gaskets. Which I did. Now when I press the foot pedal the horizontal clamp works but when I depress the finder button halfway for the vertical clamp, it does not move. Any advise?

 

[Paul Cascio]

My guess is that you have a maintenance issue causing these problems-- possibly water in the air line, or a failure to inject some air tool oil in the air line. However, even with that these are all pretty minor issues.

 

[Joe B]

It sounds like you mixed up one of the air lines unless you didn't put the cylinder back together correctly after changing the o - rings. Just a thought.

 

[Mike Labbe]

We had something similar a couple times in the past where when releasing there would be a delay for the main piston to return to the home position, and you would hear air leaking until it did. We changed the foot pedal at their advice, replaced the valves at their advice, but the problem was that there was a buildup of sticky material on the piston itself. I dropped the piston by loosening the 4 bolts underneath, took it out and wiped it down, put it back, and it runs fine since.

 

[Rosienel8]

Thank you, when I replaced the rings and gaskets on the pistons I did do a oil clean of all areas. Is there a certain position I should put the piston back in at? All up or all down? Maybe that is the cause?

 

[Jim Miller]

If the pneumatic cylinders leak air or seem sluggish, that may be an indication of trouble with the input air. Moisture corrodes the polished surfaces of pistons & cylinder walls; debris from inside the air hoses/pipes abrades the smooth surfaces and the seals; and lubrication is necessary to the friction surfaces to run smoothly. Pneumatic tools are very durable and can be trouble-free if the input air is clean, dry, and lubricated. So, most of the experts advice placing an air filter/lubricator in the air line.

Since compressed air collects moisture, and debris accumulates on the inside of air hoses & pipes, place the air filter/lubricator as close as possible to the machine's input. If you install such a device at the compressor, across the room from the machine, its benefit would be greatly reduced.