Compressor Pre-lube System

Ariel compressors must be pre-lubed anytime the crankshaft is turned and prior to starting. Ariel strongly recommends an automated pre-lube system to extend driveline component life.

Ariel requires automated pre-lube systems for compressors that meet any of the following criteria:

• Electric motor driven compressors.

• Unattended-start compressors, regardless of driver type.

• Compressor models JGC:D:Z:U:B:V and KBZ:U:B:V.

See Fig. 6-1 for pre-lube circuit design.

Note: the pre-lube return into the frame must be upstream of the oil filter.

For on-demand compressor applications, the pre-lube pump can circulate oil continuously through the bearings while on standby.

Ariel requirements are based on a pre-lube pump sized for 25% of frame oil pump flow to ensure oil flow to bearings, bushings, and oil-filled clearances prior to turning or start-up (see the Ariel Performance Program for frame oil pump flow rates).

Pre-lube pressure shall be 30 psig (2.1 barg) at the oil gallery for a minimum of 2 minutes prior to turning or starting.

Note: A 10 to 15 minute pre-lube is required after:

• Any major driveline maintenance

• The main lube oil system is drained

• Oil filter replacement