Volvo FH12 Pneumatic suspension.

Good afternoon, I have a rigid FH 12 with pneumatic suspension on the rear axle. After turning off the engine, the two flames on the left side are emptied relatively while both on the right side keep the pressure for much longer. The bellows on the left side are practically new. What should you check and in what order? Could anyone send me a tire circuit scheme?
Greetings,

Hello 1095ldr
if as you say the bellows are new check the installation from the bellows to the Valves of the suspension and also is also in search of an air leak

a greeting