In Reply to: Hydrolic Pump Help posted by Charles(NC) on March 16, 2017 at 11:40:44:
If you raise the lift to the full extent in the UP position, shut off engine, and it drops, no matter if within a few minutes or a few days, you have a bad cylinder and/or pump housing. A good hydraulic system will hold a load up for weeks. Did you use the NAA-530-B piston and NAA-533-A O-Ring with the leather NAA-473-A backup washer/wiper? Did you go by the I&T F-04 Manual? System in draft control mode when reassembled? here's a little bit of help for you ... click on LINK...