MolaKule
Staff member
Originally Posted By: diesoiluser
New-design transmission already in prototype stage and under development. We (reluctantly) took over the design from someone else. I've been nominated as the lube guy, hence me being out here on BITOG asking questions.
Sump as big as required.
Heavy-duty on-road truck.
Turbo diesel engine.
Severe service.
None of these specify the fluid. Can you tell me where your questions are leading? I don't understand.
Originally Posted By: deisoiluser
From there I need the lowest viscosity that will provide adequate film thickness at the tooth and bearing contact pressures involved. The answer there is 10 cSt at 100°C, based on empirical tests we have run already and recognizing the difference between the absolute viscosity requirement and a kinematic viscosity measurement/specification.
How did you determine you needed a 10 cSt fluid? Equations, in situ measurements?
Bearing size(s), gear tooth diameters and profiles, torque, rpm, etc would be helpful.
We're trying to help you here so specifics would be appreciated.
New-design transmission already in prototype stage and under development. We (reluctantly) took over the design from someone else. I've been nominated as the lube guy, hence me being out here on BITOG asking questions.
Sump as big as required.
Heavy-duty on-road truck.
Turbo diesel engine.
Severe service.
None of these specify the fluid. Can you tell me where your questions are leading? I don't understand.
Originally Posted By: deisoiluser
From there I need the lowest viscosity that will provide adequate film thickness at the tooth and bearing contact pressures involved. The answer there is 10 cSt at 100°C, based on empirical tests we have run already and recognizing the difference between the absolute viscosity requirement and a kinematic viscosity measurement/specification.
How did you determine you needed a 10 cSt fluid? Equations, in situ measurements?
Bearing size(s), gear tooth diameters and profiles, torque, rpm, etc would be helpful.
We're trying to help you here so specifics would be appreciated.
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