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Farmall 450 engine

K

KSfarmalladdict

New User
My buddy and I picked up a 450 yesterday and has both a gas tank and diesel tank. We know nothing about it, but really thought it was neat. We are done working on a 560, and in the process of working on a 666. We need information on the 450, does any one have info that we can get? Thanks
 
The engine starts on gasoline and runs on diesel.
It has three valves in the cylinder head, one is a compression relief that leads to a spark plug. The intake system is linked to a carb for running on gasoline to warm it up, then the linkage closes the carb ports, and the third valve closes, and injection of diesel fuel begins. Very easy starting when all is well. Efficient operation on Diesel. There is no way to run it for work on gasoline as there is no throttle, and it just makes enough speed to be at a fast idle. The manual is a great idea. To fool with it without one is not wise. There are hundreds of posts on this forum about it, and those help. If you get it running, warm it up on gasoline for at least a minute in summer, and 2 to 3 min in winter. Let it run after it is at temp on Diesel for at least a minute and a half at slow idle. If worked hard, idle for 3 to 4 minutes. (prevents cracking a complex head) Do not switch to gasoline for shutting it down, it is not the answer. JimN
 
One possible dispute- shutdown switch to gasoline? Archives quote old manuals as saying switch to gasoline to shutdown at idle so diesel fuel is purged from cylinder for next start, then shutoff engine after idle couple minutes, then set controls back to diesel to let third valve close/reseat to prevent valve warpage. Early MDs drill- using it meant long life, not doing it meant hard starts, not resetting to diesel after stopping engine was the valve problem. RN
 
i think its just the old saying," it sounds good on paper". there is no reason i can think of to switch to gas before shut down.no diesel enters the gas chamber,and when you close the diesel shut down on pump the cyl. should be purged by the time it stops. i have not experienced anything that manual says.
 
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