The Forestry Forum

General Forestry => Sawmills and Milling => Topic started by: bstreyle on February 02, 2022, 07:21:03 PM

Title: 471 detroit control
Post by: bstreyle on February 02, 2022, 07:21:03 PM
im very ignorant when it comes to my detroit. its a 471 2 stroke but i dont know what govenor is on it . they say i should have a variable speed gov. anybody could post a pic of a variable speed gov. and throttle arrangement, id appreciate it. i ve been told i need 1cable for throttle control and 1 cable for a kill or shut off switch. i really appreciate any help. thank you
Title: Re: 471 detroit control
Post by: handhewn on February 03, 2022, 11:38:06 AM
I've been running a 671 2 stroke for 40ish years. It has never failed so I don't know anything about the governor but I can tell you I just throttle down and it shuts down. No extra anything needed.
Title: Re: 471 detroit control
Post by: mudfarmer on February 03, 2022, 12:10:48 PM
Who is the "they"? 

I am nowhere near an expert but was recently dealing with Detroit that had manual shutdown cable (fuel shutoff? Air shut off?) Like many diesels do. It has a cool throttle setup that someone rigged up with an air brake can and a spring. Still uses an air brake valve like in a truck, then spring from brake can to throttle linkage. Don't know anything about the governor except it worked
Title: Re: 471 detroit control
Post by: dgdrls on February 03, 2022, 09:15:31 PM
No expert here. But see if this helps 
https://files.eric.ed.gov/fulltext/ED021077.pdf (https://files.eric.ed.gov/fulltext/ED021077.pdf)

D
Title: Re: 471 detroit control
Post by: StimW on February 03, 2022, 10:38:46 PM
Detroit's have to have a fuel shut off and an emergency stop (air shut off).
You can google and find links to them "Running Away" and the only way to stop them is shut off the air or wait for them to blow up!
They will also run backwards! ( until they seize from oil pump running backwards)
I had a GMC Semi run backwards. I was backing under a heavy trailer and stalled it, it shot me back out starting the engine backwards. Good thing I had been told about it, I shut it down before any damage.