hammer not coming up

[mark]

My BN200 drives nail good but the hammer does not come way up. It only comes up about 1/2". I can slide it up with my finger easily. I use plenty of oil. There are no nicks on the driver. The o-ring on the plunger is good.

[Mark]

Hi Mark,

The driver not returning is most likely cased by a bad check seal. The seal acts like a valve letting air out of the cylinder. I would recommend installing an Overhaul Maintenance kit. It will replace the check seal plus all of the other seals and rings that typically fail. The kit is part #60079 and is available from http://www.ereplacementparts.com.

Good luck with your repair!

-Mark