DSM.0165 Ver. 2.0 April 26, 2023
Diagnostic, service, maintenance, and inspection manual for 287-series ProRail® side mount (SM) compressed natural gas (CNG) fuel systems equipped with Marathon pressure regulator and Blue iQ™.
Description and Operation Overview
Maintenance
Defuel Procedures
Excess Flow Valve Reset Procedure
Manifilter Element Replacement
Inspection Types and Intervals
Initial Delivery Inspection
Six Month Inspection
Fuel System Inspection
Bushing Ring and Isolator Inspection
Symptom-based Diagnostics
OEM Fuel Gauge Inoperative Diagnostic
Blue iQ™ Fault Code Diagnostics
Blue iQ™ Fault Code Diagnostic Procedures
Repair and Replacement Procedures
Fuel Management Module (FMM) Components
Fuel System Control Module (FSCM)
Standard NGV1 fill receptacle or fast fill receptacle
High-pressure (HP) fuel gauge or low-pressure (LP) fuel gauge
Supply solenoid valve (SSV) coil
Pressure regulator (Marathon extended range)
Pressure / temperature transducer
Fuel Storage System Components
Cylinder neck mount block - fixed (valve) end
Cylinder neck mount block - sliding (plug) end
Cylinder neck mount block bushing
Removing a Vehicle from Service
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