How does a governor work

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Jan 14, 2008 | 05:56 AM

JimG1098

Thread Starter

Fleet Mechanic

Joined: Jan 2007

Posts: 1,847

Likes: 37

From: Eastern shore,Salisbur,MD

How does a governor work

On the 54, 279ci, ( fire truck )there is a governor attatched to a holly 2 bbl.. From the governor, there is a hydrolic line to the gov control at the pump panel.
crank controls a master cyl type to line.

What exactley does a gov. do. and how does it work, AND is it necessary to rebuild if I rebuild the carb. Carb is leaking a little. I also believe the electric fuel pump I have is putting to much presure out. Original manual calls for 4-5 lbs. The new ones typicaly out out aprox. 11 lbs.

Can I operate the truck if I remove the governor?

Thanks,

JimG

Jan 14, 2008 | 06:11 AM

Walston

Cargo Master

Joined: Aug 2004

Posts: 2,575

Likes: 36

From: Greenville, SC

A governor limits the speed of the engine. I assume there is a water pump connected to the engine. I would guess the governor was used to keep from over speeding the pump and creating too much water pressure while fighting a fire, but as I said I am guessing, I have not worked on a fire truck before.

Do you have a shop manual? The 54 shop manual should have information on the engine. I doubt you need the governor just to run the engine and drive the truck.

Jan 14, 2008 | 10:04 AM

ALBUQ F-1

Fleet Owner

Joined: Jul 2004

Posts: 27,294

Likes: 1,055

From: NM

The governor works just like a cruise control, uses vacuum on a diaphragm. You can run without it. It is described here in this Holley manual:

http://www.tocmp.com/manuals/Carbs/H...211019573.html