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ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 018-016   Fuel System

Specifications

 TOC

Cummins® Common Rail Fuel System

Maximum Fuel Return Line Pressure

All Applications Except Marine 254 mm-Hg [10 in-Hg]
Marine Applications 102 mm-Hg [4 in-Hg]

Maximum Fuel Inlet Restriction (gear pump inlet)

All Applications Except Marine 304.8 mm-Hg [10 in-Hg]

Maximum Fuel Inlet Restriction – At OEM Connection (dirty filter) Loaded Condition

All Application Except Marine 203.2 mm-Hg [8 in-Hg]
Marine Applications 102 mm-Hg [4 in-Hg]

Maximum Fuel Inlet Restriction – At OEM Connection (clean filter) Loaded Condition

Marine Applications 63.5 mm-Hg [2.5 in-Hg]

Minimum Gear Pump Pressure (during cranking)

During Cranking Condition 105 kPa [15 psi]
During Rated Condition 483 kPa [70 psi]
Maximum Filter Pressure Drop 138 kPa [20 psi]
Minimum Lift Pump Pressure (gear pump inlet during cranking) 35 kPa [5 psi]
Minimum Engine Cranking Speed 150 rpm
Primary Off engine fuel filter element 10 Micron
Secondary On engine fuel filter element 3 Micron

CAPS Fuel System

Maximum Fuel Inlet Restriction at Rated (measured at lift pump inlet) 102 mm Hg [4 in Hg]
Maximum Fuel Inlet Restriction at Rated (measured at CAPS pump inlet) 254 mm Hg [10 in Hg]
Minimum Lift Pump Pressure 35 kPa [5 psi]
Maximum Filter Pressure Drop at Rated 102 mm Hg [4 in Hg]
Minimum Gear Pump Pressure (during cranking) 69 kPa [10 psi]
Minimum Engine Cranking Speed 150 rpm

Last Modified:  06-Jan-2010
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