The significance of used oil analyses as applied to tractor hydraulic oils is discussed with particular emphasis on fluid commingling. Pentane insolubles and changes in TAN or TBN are used to assess in-service oxidation stabilities of tractor transmission-hydraulic oils. Spectrographic wear-metal analyses were difficult to interpret without detailed information on unit design, maintenance and use. A baselining technique can be helpful for evaluating wear in tractor field tests.Estimates of fluid commingling were developed from used oil additive-metal analyses. Commingling was extensive, averaging 43% in seventeen farm tractors of various manufacture. No field problems have been identified that are caused by commingling. Our experience indicated that a common transmission-hydraulic lubricant for service fill use in all farm equipment is feasible.
Significance of Used Oil Analysis for Tractor Hydraulic Fluids
Sae Technical Papers
1975 SAE International Off-Highway and Powerplant Congress and Exposition ; 1975
01.02.1975
Aufsatz (Konferenz)
Englisch
Multipurpose tractor hydraulic fluids field test - used-oil analysis and significance
Kraftfahrwesen | 1988
|Multipurpose Tractor Hydraulic Fluids Field Test-Used-Oil Analysis and its Significance
SAE Technical Papers | 1988
|