Open-Drive Machines (17 Series) Lubricati on Cycle

Summary

The main oil pump and oil reser v o ir are contained in the comp ressor base. Oil is pumpe d
through an oil cooler and a filter to remove heat and any f oreign particles. A port ion of the oil is
then directed to shaft -end bearing and the shaft seal. The balance of the oil lub ricates the
compressor transmiss io n and the thrust and journa l bear i ngs. The bearing and trans m is s ion oil
returns directly to the reservoir to complete the cycle. Contact-seal oil leakage, however, is
collected in an atmosph eric float chamber to be pu mped back to the main reser v oir as t he oil
accumulates.

Details (See Figure 6)

Oil may be charged in to the reservoir (1) through a hand va lve (2) which also fun ctions as an
oil drain. If there is refri gerant in the machine, how ever, a hand pump will be requ ired for
charging at this connect ion.
An oil-charging elbow (Item 20) on th e seal-oil return chamber all ows oil to be added without
pumping. The seal-oi l return pump (Item 21) auto matically transfers the oil to the main reservoir.
Sight glasses (Item 6) on th e reservoir wall permi t ob servation of the oil level.
A motor-driven oil pump ( Item 5) discharges oil t o an oil cooler (Item 7) at a rat e and pressure
controlled by an oil regul ator (Item 4). The diff er en tial oil pressure (bea r ing supply versus oil
reservoir) is regis te r ed on the control panel.