Elevated oil consumption, oil carried into the line

Q: Elevated oil consumption, oil carried into the line (Atlas Copco MAS GA 18): what to do?

Cause: Incorrect oil (foaming), over‑filling, oil separator faulty, oil return line defective. What to do: Replace oil with correct type, drain excess, replace oil‑separator element or return line check valve

Atlas Copco MAS GA 18, oil-filled screw compressor

Possible cause

Incorrect oil (foaming), over‑filling, oil separator faulty, oil return line defective

What to do

Replace oil with correct type, drain excess, replace oil‑separator element or return line check valve

Manufacturer's manual, p. 93

See the assembly on the 3D model

Other Atlas Copco MAS GA 18 faults

Compressor starts but does not loadFaulty solenoid valve / stuck intake valve / leak in control lines / non‑sealing minimum‑pressure valve Compressor does not unload, safety valve tripsFaulty solenoid valve or intake valve does not close Condensate does not drain under loadDrain line clogged Performance or pressure below normalFlow exceeds capacity, air filter clogged, solenoid valve faulty, leaks, intake valve not fully open, safety valve choked Safety valve trips after loadFaulty intake valve, minimum‑pressure valve or safety valve itself; oil separator clogged High temperature at block outlet or air outletLow oil, insufficient cooling air, oil or air cooler clogged, bypass (thermostatic) valve faulty Compressor does not start, engine overload displayed on screenIncorrect phase sequence

From the manufacturer's manual “MAS18P-100 APB 440-460V 60 FM - ITJ396636 - Instruction Book”. Check against the original on board before work.

This page was translated automatically from the manual summary. Part numbers, codes and page numbers are as in the original.