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I have a truck with a 3406 A model cat how often & when

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I have a truck with...
I have a truck with a 3406 A model cat how often & when should I the preheater its a dash mounted spring loaded switch I just changed the solenoid for it what does it do & what's its purpose & how does it work
Submitted: 2 years ago.Category: Medium and Heavy Trucks
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Answered in 2 minutes by:
3/7/2016
Technician: Cat Man, Cat Engine Expert replied 2 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 9,452
Experience: I am ASE Master Truck Certified.
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Thanks for asking your question. I will try and help you out.

Are you referring to the override switch that you have to hold to start the engine?

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