Diesel Test/PC-9 Procedures
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The engine is a General Motors
6.5-liter, indirect-injected diesel. |
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At procedure end, the roller follower axles are removed and
their wear is measured using a linear profilometer. |
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Top image is FAIL; bottom image is
PASS |
The roller follower wear procedure simulates
commercial and military applications. It determines the
effect of lubricating oils on camshaft roller follower axle
wear.
The roller follower wear test is part of specifications:
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API CG-4
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API CH-4
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API CI-4
Roller Follower Wear Test Equipment and Procedure
The test engine is a General Motors
6.5-liter, indirect-injected diesel. The engine is rated at
160 horsepower at 3,400 rpm and is run at 1,000 rpm with
near maximum load for 50 hours without an oil change.
Make-up oil is added at 25 hours. Oil gallery and
coolant-out temperatures are controlled to 120°C. New roller
followers are installed at the beginning of each test.
Test
Results
At test end, the roller follower axles
are removed and their wear is measured using a linear
profilometer. Samples are taken at 25 and 50 hours. The used
lubricant is analyzed for:
The pass/fail limits for wear on the
roller follower axle have been set at:
For more information about our roller
follower wear capabilities, or how you can contract with
Southwest Research Institute (SwRI),
please contact
Jim McCord at
jmccord@swri.org or (210) 522-3439.
rollerfollower.swri.org
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Southwest Research Institute® (SwRI®), headquartered
in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied
engineering and physical sciences research and development organization with
11
technical divisions.
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