Komatsu 82E-6, 84E-6, 88E-6, 94E-6, 98E-6 Series Engine Manual

Table of Contents

00 Index and foreword
01 Specification
30 Testing and adjusting
40 Troubleshooting
Troubleshooting of mechanical system SEN04227-00
Special service tools ………………………………………………………………………………………………………….. 15-217
Troubleshooting by measuring compression pressure ……………………………………………………………. 15-219
Quick reference table for troubleshooting……………………………………………………………………………… 15-222
Failure Diagnostic List ……………………………………………………………………………………………………….. 15-223

To prevent the valve from deteriorating in exhaust gas recirculation performance due to carbon accumulation, inspect, clean and test the valve at least every 1500 hours.
Inspect and clean EGR lead valve S4D84E-Z, S4D98E-Z

The EGR lead valve is located in the passage of recirculated gas.
To prevent carbon accumulation in or clogging of the lead valve, inspect and clean the lead valve at regular intervals.