Product Manual Overview

Table of Contents

1. General Information
2. Engine
3. Fuel System
4. Electrical System
5. Undercarriage
6. Drive Train
7. Upper Structure Hydraulics
8. Upper Structure
9. Hydraulic Schematics
10. Electrical Schematics

Engine Stalling Diagnostics

Diagnosing engine stalling involves an initial examination and troubleshooting of symptoms where the engine cranks but takes time to start, or where it starts but soon stops operating. Hereu2019s a detailed guide to help troubleshoot these issues:

Preliminary Inspection

• Perform a functional inspection and OBD system check.
• Assess for excessive loads on the machine side.
• Ensure proper operation of the ECM and monitor.
• To diagnose CKP sensor abnormalities, crank the engine for a minimum of 14 seconds at 60 r/min.
• Conduct a DTC check, especially considering CKP sensor failures at low revolutions may not always be detected.
• In the event of sporadic failures, increase engine revolutions to No Load Max to verify DTC detections related to the CKP sensor.

Visual Inspection

Visual inspection can be crucial for resolving symptoms efficiently. It may prevent the need for extensive further inspections.

• Check for poor connections at connectors, especially those linked to CKP and CMP sensors.
• Ensure all wiring is properly connected and tightened, and that the ECM ground is clean and correctly positioned.
• Inspect pipes and hoses for cracks, twists, leaks or blockages, particularly in fuel, air, and oil systems.
• Examine the fuel system for damage or leaks, and check the layout of the fuel filter, pre-filter, and electromagnetic pump to prevent air stagnation.
• Verify that the Isuzu genuine pre-filter is positioned to avoid air stagnant issues, noting that it lacks an air bleeding plug.
• Identify any abnormalities in the intake and exhaust system components.