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Trusted Contributor
Trusted Contributor

Re: CAT 3406 Turbo Charged Gas Engine RPM Sinking Problem

Send the info to me at ahunt36cat@aol.com 

 

Best Regards,

Al Hunt

Re: CAT 3406 Turbo Charged Gas Engine RPM Sinking Problem

Engine S.No.  is 4FD01750. Engine mainly trips due to variation in rpm (rpm sinking). Slight passing has been observed in fuel shut-off valve of one engine while valve of other engine is working fine. The parameters of both engines from 1st August onwards can be shared if you can provide me your email address.

Fuel Analysis is given below:

 

CO2N2C1C2C3i-C4n-C4Neo-C5i-C5n-C5C6+C7Total mole %BTU GrossBTU Net S. Gr
1.108.9680.535.471.860.591.29-0.100.070.03 100.001025-0.677

 

 

 

Trusted Contributor
Trusted Contributor

Re: CAT 3406 Turbo Charged Gas Engine RPM Sinking Problem

Need to know the engine serial number and a copy of the fuel analysis. 

What kind of governor does the engine have? 

What do you have the ignition timing set to? 

How much load does the engine have? 

What is the inlet air temperature? 

When the engine shutsdown, what is the cause?  Does the load lug it down?  Does the fuel shut off?  Does the ignition shut off?

Some more info will help point you in the right direction.  Thanks.

Best Regards,

Al Hunt

CAT 3406 Turbo Charged Gas Engine RPM Sinking Problem

Dear All,

Good Day! 

We have at our facility two turbocharged CAT G3406 engines (325 HP, 1800 RPM) that are used to drive Quintex Single Acting Plunger Pumps having flowrate 316 GPM. We are facing alot of issues regarding RPM sinking / hunting in the engine causing frequent trippings.

Can anyone share the recommended troubleshooting procedure for tackling this problem. I personally suspect there is something wrong in the fuel cirucit like fuel pressure or wrong AFR as the avg exhaust temp in one engine is 1070 F from last one week while in the 2nd engine its around 990 F. The fuel is mostly field gas having high conc. of methane.

 

Regards,

Waqas