F5H Tier 4 Engine – CEGR/DPF System Diagnostic & Operation Manual for 750M Dozer

The FPT F5H Tier 4 engine is a 3.4 L common-rail diesel designed for Tier 4A emission compliance using CEGR (Cooled Exhaust Gas Recirculation) and a DPF (Diesel Particulate Filter) system.
This manual covers detailed service procedures, regeneration cycles, system layout, and component logic for machines such as the CASE 750M Dozer, SR Series Skid Steers, and N Series TLBs.
Key subsystems include:

• Bosch EDC17C49 ECU with DPF management

• EGR cooling and boost pressure modulator control

• CJ-4 low-ash lubricants and 15 ppm sulfur diesel requirement

• Automatic, manual, and service DPF regeneration modes

• Temperature, pressure, and lambda sensor monitoring for NOx and PM control

Coverage

• Introduction

  • Overview of Tier 4 emission standards

  • CNH compliance timeline and requirements

  • SCR vs CEGR/DPF comparison

• Lubricants and Fuel Requirements

  • CJ-4 oil classification and ash limits

  • CNH Tutela Unitek specifications

  • Low-sulfur diesel (15 ppm) usage

  • Temperature guidelines for CI-4 and CJ-4 oils

• Engine Overview

  • 3.4 L Common Rail architecture

  • DPF and EGR system integration

  • Component layout for 750M Dozer and SR Loaders

• Fuel and Injection System

  • Bosch CP4.1 pump operation

  • Injector coding and EST configuration

  • Glow plug controller and harness assembly

• Electronic Control Unit

  • Bosch EDC17C49 functions

  • Control logic for EGR and DPF cycles

  • Sensor inputs and output processing

• DPF and DOC System

  • Construction and flow pattern

  • Differential pressure and temperature sensors

  • Regeneration cycle stages and timing

  • Passive, automatic, manual, and service regeneration

• Emission Control Components

  • Intake Air Valve mechanism

  • Boost Pressure Modulator and accumulator

  • Lambda (HEGO) Sensor function

  • Cooled EGR system operation

• Diagnostics and Service

  • DPF soot load monitoring logic

  • EST reset procedures for relief valves and injectors

  • DPF service reset and configuration steps

  • Dosing and temperature regulation curves

• Mechanical Updates

  • Hydraulic lifters (non-adjustable)

  • Crankcase vent filter angle and mounting

  • Front cover alignment tools (380100280/281)

  • Plastic thermostat housing and stretch-belt design

Delivery

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