English to Italian Tech/Engineering Engineering (general) service checklist impianto di montaggio/smontaggio pneumatici

Gentili colleghi,

sono in difficoltà con la traduzione di questo termine nel seguente contesto:

Grease both left and right side lift brackets, and the orange rotating carousel bases.

Ensure torque and fresh marks on the black carousel base plates, and the carousel toilet seat bolts.
Check both left and right side.

Inspect each ***ring air port*** ensure mounting bolts are tight, and have fresh marks.
Ensure both seals on each port are present, and free of debris and damage.

Inspect and clean all reflectors on each toilet seat for "ring present" switch.

Grazie per ogni suggerimento!