Atlas Copco XAS 185 JD is a portable diesel air compressor used in construction, utility, and industrial service applications. It is part of Atlas Copco's XAS series and is designed to supply compressed air for pneumatic tools, sandblasting, drilling, and general site operations. The unit is commonly mounted on a trailer for transport between job sites. The XAS 185 JD is typically powered by a John Deere diesel engine and is known for delivering reliable airflow in a compact package. It is used where mobile compressed air is required for field work, maintenance, and equipment support.