Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/1275515
ML PUBLISHER Mike Ramsey - mramsey@noria.com GROUP PUBLISHER Brett O'Kelley - bokelley@noria.com SENIOR EDITOR Jim Fitch - jfitch@noria.com TECHNICAL WRITERS Wes Cash - wcash@noria.com Bennett Fitch - bfitch@noria.com Matthew Adams - madams@noria.com Devin Jarrett - djarrett@noria.com Travis Richardson - trichardson@noria.com GRAPHIC ARTISTS Patrick Clark - pclark@noria.com Josh Couch - jcouch@noria.com Matt Berkenbile - mberkenbile@noria.com ADVERTISING SALES Brett O'Kelley - bokelley@noria.com CORRESPONDENCE You may address articles, case studies, special requests and other correspondence to: Editor-in-Chief MACHINERY LUBRICATION Noria Corporation 1328 E. 43rd Court • Tulsa, Oklahoma 74105 Phone: 918-749-1400 Fax: 918-746-0925 Email address: editor@noria.com MACHINERY LUBRICATION Volume 20 - Issue 4 July - August 2020 ( USPS 021-695) is published bimonthly by Noria Corporation, 1328 E. 43rd Court, Tulsa, OK 74105-4124. Periodicals postage paid at Tulsa, OK and additional mailing offices. POSTMASTER: Send address changes and form 3579 to MACHINERY LUBRICA- TION, 1328 E. 43rd Court, Tulsa, OK 74105-4124. SUBSCRIBER SERVICES: The publisher reserves the right to accept or reject any subscription. Send subscription orders, change of address and all subscription-related correspondence to: : Noria Corporation, 1328 E. 43rd Court, Tulsa OK 74105-4124. 918-749- 1400 or Fax: 918-746-0925 Copyright © 2020 Noria Corporation. Noria, Machinery Lubrica - tion and associated logos are trademarks of Noria Corporation. All rights reserved. Reproduction in whole or in part in any form or medium without express written permission of Noria Corpo- ration is prohibited. Machinery Lubrication is an independently produced publication of Noria Corporation. Noria Corporation reserves the right, with respect to submissions, to revise, republish and authorize its readers to use the tips and articles submitted for personal and commercial use. The opinions of those interviewed and those who write articles for this magazine are not necessarily shared by Noria Corporation. CONTENT NOTICE: The recommendations and information provided in Machinery Lubrication and its related information properties do not purport to address all of the safety concerns that may exist. It is the responsibility of the user to follow appro - priate safety and health practices. Further, Noria does not make any representations, warranties, express or implied, regarding the accuracy, completeness or suitability of the information or recommendations provided herewith. Noria shall not be liable for any injuries, loss of profits, business, goodwill, data, interruption of business, nor for incidental or consequential merchantability or fitness of purpose, or damages related to the use of information or recommendations provided. • Internal leakage. Various sources of internal leakage can cause other nearby fluids to invade the sump. ese include coolant, washdown f luids, fuel, heat transfer fluid, hydraulic fluid, grease and process fluids. Oil analysis can identify these fluids. Oil Too Low: is is usually caused by leakage, but there are other reasons. • Out-leakage. is is an alert to examine the machine for any visual sign of oil leakage to external surfaces (oil exiting the machine). • Internal leakage. If no out-leakage is observed, are there other internal pathways and compartments where the oil might have gone? Look for rising fluid levels in these zones and compartments. • Gear climbing. Oil lifters, including paddle gears, slingers/flingers and the rota- tion of moving parts (gearing in particular) all draw oil out of sumps and reservoirs and lower the apparent oil level during machine operation. • Oil pump out. After startup, oil reservoirs can go down as the pump fills system lines and cavities such as gear cases, bearings, oil galleries and distant oil ways. • Bleed purge. Hydraulic and circulating systems often have bleed valves that when opened allow trapped pockets of air to purge and become replaced by oil. is draws the oil level down the reservoir.