Detroit Diesel DD15 EuroIV Operator's Manual page 60

Preventive Maintenance Intervals
Poly-V Belt
Auto Tensioner - Auto tensioners are usually maintenance free for the life of the
engine. However, routine inspections should be performed. Uneven belt wear can
indicate a loose, wore out, or bad bearing on the auto tensioner. A build up of dirt
or grime around the front bearing surface of the wheel can indicate a future bearing
failure due to inadequate lubrication.
Fuel / Water Separator
Incorporated into the fuel filter module is a fuel/water separator. The separator
removes emulsified water as well as droplets and is located in the lower
compartment of the fuel filter module. A water-in-fuel (WIF) sensor indicates when
trapped water needs to be drained.
NOTICE: Do not over-tighten the water drain valve. Failure to properly
tighten the water drain valve may cause damage to the water drain valve
and housing.
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All information subject to change without notice.
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