Cummins ISM Quick Sheet

The Cummins ISM is the alternative engine to the larger ISX for local and long haul applications. Although mostly seen in daycab tractors and vocational trucks, the ISM engine can also be found in large motorhomes and fire equipment.

Designed as a replacment for the original M11 engine, the Cummins ISM began with the CM570 fuel system and progressed with the following:

1.) In 2002, upgraded to the CM875 fuel system which included an EGR valve for EPA emmission compliance.
2.) In 2007, upgraded to the CM876 fuel system. This fuel system still includes the EGR, but also added a Diesel Particulate Filter (DPF) to conform to the new EPA standards.

Use the charts below for useful information for the ISM engine:

Engine Ratings

Advertised hp @ rpm Peak Torque lb-ft @ rpm Governed Speed
280 - 500 1150 - 1550 @ 1200 2100

Maintenance Schedule (All Fuel Systems)
(Why Fleetguard Filters?)
Oil Filter 15,000 Miles, 500 Hours, or 6 Months
Fuel Filter 15,000 Miles, 500 Hours, or 6 Months
Coolant Filter 15,000 Miles, 500 Hours, or 6 Months
Clean Particulate Filter (DPF)
2007 models & up
240,000 Miles, 6000 Hours, 3 Years
Valve Adjustment 120,000 Miles, 3000 Hours, or 2 Years


Filter Part Numbers (Fleetguard Numbers, all Fuel Systems)
Oil Filter LF9000 or LF9001*
Fuel Filter FS1000
Coolant Filter WF2071
*The LF9001 is a shorter version of the LF9000 for clearance issues.

Useful Specs (All Fuel Systems)
Intake Valve Clearance .010"
Exhaust Valve Clearance .024"
Engine Brake Piston Clearance .015"(through 2006)
.027" DPF equipped(2007 & up)
Firing Order 1-5-3-6-2-4
Oil Pressure 10psi (Idle), 30psi (Rated RPM)

Fuel Pressure Specs (All Fuel Systems)

Cranking 25 psi
1200 RPM 120 psi
2100 RPM 150-180 psi


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