Upon starting the engine, everything appears normal. However, the crane hydraulics are inconsistent in working. Some days it will work, other days it won't. Often it will work in the morning but not in the afternoon. Has anyone experienced something similar? Any tips on troubleshooting would be appreciated, or tips on where else I may be able to find information on this.

Make: Genie
Model: GHT 2506 AU2
Serial Number: 20635
Diesel Engine