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Truck Repair/Cummins NTC300


Hi Jeff, I have a NTC300 with model 400 jake heads, two are damaged and I have a set of model 30E jake heads, are these interchangable? Cheers

According to the Jacobs brake website they are interchangeable. I myself have never tried it so I can't tell you for certain if everything is a direct bolt up. Don't know what you mean by damaged but they are rebuildable if you wanted to go that route.  

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Jeff Drumm


I Can answer any question pertaining to semi trucks and trailers. Have no experience in the automotive field so not able to help in that area.


My experiences in Semi Trucks is. I own my own truck and i presntly maintain a 80 truck fleet. Can handle any questions pertaining to a truck have tore apart and rebuilt every aspect on them. Fleet I deal with is Mainly Volvo trucks and a handful of freightliners. Work on automated transmissions on a daily basis along with carrier apu's. With engines my specialty is the 60 series Detroit but do work on the cummins isx the n-14 and the ism. and also the Volvo engines.

Have a College Degree from university of northwestern ohio in diesel and agriculture mechanics. Have 10 years behind the wheel driving a truck and 4 years working on trucks full time. Also have grown up on a farm so have been tinkering on trucks and tractors all my life.

Awards and Honors
I've gone through online schooling and have received certificates from webb wheel, Timken and Volvo academy.

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