Posted 1/17/2008 15:30 (#285418 - in reply to #285205) Subject: Re: JD 4955 ---Change out front Hyd. Pump
NESD
Jon is correct, you may need only to remove the piston plug and replace the o-ring and the sheath (white plastic ring) oil it liberally and install, if the shaft seal isn't leaking I would just try to replace the O-ring. The downside is that it is a lot of work to replace the one o-ring.