Dana’s Commercial Vehicle Systems group has enhanced its 40,000-lb tandem axles by incorporating the patented OnDemand lube pump option in several popular models. The pump is said to raise efficiency by reducing parasitic losses, reducing weight, lowering operating temperatures, and extending and improving lubricant performance. Overall fuel consumption is thus reduced.

Currently used widely with Dana’s D170 and D190 tandems, the pump is now available with heavy-duty on-highway and vocational tandem axles, as well as Dana’s torsionally-tuned single-speed, tandem drive axles. The current model numbers include: DS404(P), DS405(P), DST40(P), DST41(P), DSH40(P), and DSH44(P). All existing approved applications will remain in effect, as will Dana’s 5-year/750,000-mile warranty coverage with approved lubricants and seals.

The lubrication system operates only when needed, only during a spinout situation. More than 99% of the time, says Dana, the pump avoids engagement during normal vehicle operation – meaning no wasted horsepower, lower temperatures in the sump, and longer lube life. As well, axles with OnDemand pumps have no external filters to service and maintain.