Engine-Fuel-Lubricant Compatibility Tests on MIL-L-2104C Oils Using Engine Model 6V53T and NATO F-54 Diesel Fuel.
Interim rept. May-Sep 74,
SOUTHWEST RESEARCH INST SAN ANTONIO TEX ARMY FUELS AND LUBRICANTS RESEARCH LAB
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The final three tests in a series of 13 engine-fuel-lubricant compatibility tests were completed using the Armys high-output two-cycle diesel engine model 6V53T. In the earlier tests in this series, two MIL-L-2104C lubricants low and mid-ash level produced acceptable performance and a third lubricant of high-ash level was considered borderline acceptable--all during operation with reference No. 2 DF 0.42 wt sulfur. During operation with an off-specification high sulfurhigh end-point 1.2 S744F fuel intended to meet MIL-F-16884F Marine Diesel Fuel, and 6V53T engine was judged incompatible in two tests using two different MIL-L-2104C lubricants. In the final three tests reported herein, this engine was judged to be incompatible with a special blend of NATO F-54 diesel fuel 0.64 sulfur during operation with the same two MIL-L-2104C lubricants used in the tests with the 1.2 sulfur fuel. The judgment was based on the occurrence of catastrophic pistonringexhaust valve failure and relatively high deposit and wear levels. Recommendations for additional research are made.
- Lubricants and Hydraulic Fluids
- Combat Vehicles
- Reciprocating and Rotating Engines