SM52 Air Compressor woes

[Greg Wallace]

my compressor goes up to about 6 bar and unloads. When the air pressure gets down to about 3 bar it loads again back up to 6 bar. The compressor never stops.
It's a KK15
I've disassembled every valve, every switch, took off the heads and inspected, but can't find the issue.
Chat gtp says it has an internal load valve that may be failing.
Heidelberg says it's the little vanes inside the head, but i don't think so.
It hold pressure when the power is off.
Any ideas?

 

[Alexander hdm]

Hello. You have a large air leak in your car's system.

 

[printstartup7]

car's???

 

[Joe Burger]

Hello, in this case, and if the compressor can maintain pressure when the machine is off, there is a tear in a pneumatic hose (12 mm, blue) somewhere in the feeder area, indicating a leak.

 

[junker1984]

car's???

Having communicated with a few Russian printing professionals, I've noticed that in translation the meaning for "machine" turns out to be "car".