Doosan G20P-5, Service Manual, Page: 223 / 306

G424F(FE) Service Manual 221 Chapter 8. Basic Troubleshooting
Basic Troubleshooting Guide
Customer Problem Analysis Sheet
1. Forklift Information
(I) VIN:
(II) ProductionDate:
(III) Hour meter Reading: (hrs)
2. Symptoms
□
Unable to start
□ Engine does not turn over □ Incomplete combustion
□
Initial combustion does not occur
□
Difficult to start
□
Engine turns over slowly
□
Other_________________
□
Poor idling
□
Rough idling
□
Incorrect idling
□
Unstable idling (High: ______ rpm, Low: ______ rpm)
□
Other__________________________________
□
Engine stall
□
Soon after starting
□
After accelerator pedal depressed
□
After accelerator pedal released
□
Shifting from N to D-range
□
Other_______________________________________________
□
Others
□
Poor driving (Surge)
□
Knocking
□
Poor fuel economy
□
Back fire
□
After fire
□
Other____________________________
3. Environment
Problem frequency
□
Constant
□
Sometimes (_________________)
□
Once only
□
Other___________________________________________
Weather
□
Fine
□
Cloudy
□
Rainy
□
Snowy
□
Other__________________
Outdoor temperature Approx._____
℃/℉
Place
□ Suburbs □ Inner City □ Uphill □ Downhill
□
Rough road
□
Other___________________________________
Engine temperature
□
Cold
□
Warming up
□
After warming up
□
Any temperature
Engine operation
□
Starting
□
Just after starting (____min)
□
Idling
□
Racing
□
Driving
□
Constant speed
□
Acceleration
□
Deceleration
□
Other_____________________________
4. MIL/DTC
MIL (Malfunction Indicator Lamp)
□
Remains ON
□
Sometimes lights up
□
Does not light
DTC
□
Normal
□
DTC(_______________________________________)