hi, I have an account with an RXF85E compressor that the slidevalve takes about 30 minutes to fully load up after a shut down. I have not seen this before in other units, and this one has been doing this for a couple of months and getting a little worse as time goes by. The oil pressure drops a little with higher discharge pressures due to higher ambiants, but does not seem to effect this situation. Any help is appreciated.