I've gotten a fair amount of use from my Mv-50 over the last 7+ years. I pump up my tires from 32 to 50psi, and my suspension helper spring airbags from 5 to 100psi. I also use it to prime my water pump, and I've reluctantly lent it out to people Whom could break an Anvil.
I gave it a tune up a few years back and tapped the head for 1/4 NPT threads so I could use better fittings.
It has some metric head fitting. There are adaptors. The part which slowly screws onto the Schrader valve is highly annoying.
Never run it with the air filter off.
Remove all the plastic mold flashing from the air filters intake holes . Huge difference.
They are easy to take apart, clean and fine tune as they were not assembled with love.
I attached a 80MM 12v fan to the handle which comes on with the motor.
They do get real hot, the cylinder head, not so much the motor, but especially when the cylinder is dirty. A little high temp grease between the cylinder's exterior and the heatsink goes a long way toward heat dissipation.
I cleaned and lubed the rubber piston cup with Syl-glide.
If you get one, find the right size allen wrench and retorque the head bolts. When I went to take mine apart, I found them finger tight.
These say max of 13.5 volts. I think a lot of failures one reads about in reviews are have been induced to overvoltage and overtemperature. The air filter is a big one. I found half the filter intake openings were occluded.
But also the 12v wires leading into it are not spliced very well and there was NO strain relief, so too much strain on the power cord and it can pull a wire connector off of the relay, or switch, or pull from the crimp connector.
Mine pulls 16 to 18 amps at 12.6v.
Do note that the stock air valve is passive. When the unit is turned on unattached to a schrader valve, air escapes the end oh the hose. If one modifies for better fittings, the new air hose can build pressure quickly and exceed 150PSI and something will break.
I drilled a hole through mine so it cannot self destruct. This locking chuck is key.
The yellow airhose is a harbor freight special. I've since replaced it with a much better quality hose of smaller coil diameter that is an absolute joy o work with compared to the HF or the original yellow Hose. I'm not using any quick release fittings, but I keep them handy just in case.
So the MV-50 can be turned into a capable machine, but it leaves the factory in serious want of some fine tuning.
I gave it a tune up a few years back and tapped the head for 1/4 NPT threads so I could use better fittings.
It has some metric head fitting. There are adaptors. The part which slowly screws onto the Schrader valve is highly annoying.
Never run it with the air filter off.
Remove all the plastic mold flashing from the air filters intake holes . Huge difference.
They are easy to take apart, clean and fine tune as they were not assembled with love.
I attached a 80MM 12v fan to the handle which comes on with the motor.
They do get real hot, the cylinder head, not so much the motor, but especially when the cylinder is dirty. A little high temp grease between the cylinder's exterior and the heatsink goes a long way toward heat dissipation.
I cleaned and lubed the rubber piston cup with Syl-glide.
If you get one, find the right size allen wrench and retorque the head bolts. When I went to take mine apart, I found them finger tight.
These say max of 13.5 volts. I think a lot of failures one reads about in reviews are have been induced to overvoltage and overtemperature. The air filter is a big one. I found half the filter intake openings were occluded.
But also the 12v wires leading into it are not spliced very well and there was NO strain relief, so too much strain on the power cord and it can pull a wire connector off of the relay, or switch, or pull from the crimp connector.
Mine pulls 16 to 18 amps at 12.6v.
Do note that the stock air valve is passive. When the unit is turned on unattached to a schrader valve, air escapes the end oh the hose. If one modifies for better fittings, the new air hose can build pressure quickly and exceed 150PSI and something will break.
I drilled a hole through mine so it cannot self destruct. This locking chuck is key.
The yellow airhose is a harbor freight special. I've since replaced it with a much better quality hose of smaller coil diameter that is an absolute joy o work with compared to the HF or the original yellow Hose. I'm not using any quick release fittings, but I keep them handy just in case.
So the MV-50 can be turned into a capable machine, but it leaves the factory in serious want of some fine tuning.
