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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Mechanical Troubleshooting
Brand: Komatsu - Model: FG20ST-14
Number of messages: 5

New York, United States
anyone know how to adjust the idle for this truck? it's 2004 FG30SHT-14 and has nissan engine.

Posted 15 Oct 2010 12:51 AM Reply  Report this message
REPLIES: Sort replies by
California, United States

Hello , need to know if your engine is a K21 or K25 . also a Sn would be great

Posted 19 Oct 2010 07:35 AM Reply  Report this message
Ontario, Canada

If this is a K series engine, the idle speed is not adjustable. If the engine will not idle at 750-800RPM, there is a fault that must be corrected.
If it is an H20 with conventional Impco LPG system, there will be an idle screw on the throttle arm of the mixer. Ensure timing is at 10BTDC, intake and exhaust valves are adjusted properly, fuel mixture is set properly, then adjust to 750-800RPM. If the truck has a throttle dashpot on the opposite end of the throttle shaft, adjust the dashpot to 1200RPM with vacuum disconnected and ensure it releases completely with vacuum applied.

Posted 19 Oct 2010 08:50 AM Reply  Report this message
New York, United States
thanks for the info. it's nissan K-25 engine

Posted 1 Nov 2010 09:29 AM Reply  Report this message
California, United States
Komatsu forklifts FG20-30, -14 can set the idle speed by doing the 5 on 5 off sequence and the third  time 5 on and 20 off with the ignition switch !This relearns the ECU and the idle speed comes down to 750-800rpm. After if you have the analyzer , hoook it up and relearn the air fuel relearn the you're problem should be fixed.

If you aint gonna fix it right , then dont fix it . Gotta be perfect.

Posted 17 Jan 2011 06:28 AM Reply  Report this message accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.
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