not familiar with the machine but they look like solenoids on a hydraulic control block to me. basically they are coils of wire wound according to their voltage. anything from 12,24,110,240,380v. the 12 and 24 can be ac or dc. i have seen them run hot on some units as they can run all the time even if a machine is not processing. i wouldnt worry about it as they are designed to do this in some cases. also hot oil flowing nearby does not help with cooling. if they never were like this before pop off the caps and check the voltages with a meter and compare with the specs on the coil blocks.