| Author |
Message |
Dale Stuart (Dbstuart) (63.28.242.195)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 16, 2001 - 8:54 am: | |
My busnust buddy and I have Detroit Diesel 8V 71's with free wheeling cooling fans. Has any one out there found a way to fix the fan so it is turning all the time? This fan is mechanically driven from the front of the motor. (no belts here) Maybe this would assist in cooling better on hot days? Pass on what you know.
Thanks, Dale B. Busnut |
FAST FRED (63.215.237.150)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 16, 2001 - 12:21 pm: | |
You never stated what type coach the DD is in , and many work differently.
On my 4106 there is a thermostat that sends oil to lock up the fan drive , when the temp is high enough.
When its warm (180+] the fan turns and the hotter it gets , the more solidly its coupled.
You would only burn more fuel overcooling the radiator , if everything is working OK.
Fix what you have , it works great .
IF the engine is overheating , its somthing else .
Wrong antifreez, clogged system , broken or missing thermostat, hoses colapsing ?
FAST FRED |
Dale Stuart (Dbstuart) (63.28.242.112)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, June 17, 2001 - 3:04 pm: | |
These are GMC coaches 1965 4106 and a 1974 4905
Dale B. |
AL MORENO (152.163.197.81)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, June 17, 2001 - 3:47 pm: | |
The buses uesed this setup then they there passenger buses, to provide heat to the passengers as soon as possible on cold temp. days. Fast Fred is right, to fix it, if broke. But he is not always right! I could not find anybody, that would work on them (fan torus). So I started taking them apart and there is really noting to them. They do'nt couple any harder at 180 or 180+. There is a thermostat on the coolent duct (bottom radiator hose)that is normally open, and lets the oil that enter the torus out, back to the oil pan. When the temp. raeches 180 deg. the thermostat closes, keeping all the oil in the torus. Now to make the fan into a fix turning fan, fine the thermostat on the coolent duct, and remove the two small hoses (the in and out) and cap them. These will keep the oil in the torus and will turn as soon as the engine starts. The two thermostats that control the engine temp. will do their job and will bring the temp. to 180 deg. In winter it will take the engine an extra 10 or 15 min. to bring the temp. to 180 deg. Try it if you do'nt like what it's doing just uncap the to hoses and hook them back up. But I think you are going to be satisfy. Good Luck AL. |
Frank Allen (64.12.104.182)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, June 24, 2001 - 11:41 pm: | |
I did as AL sugested on my 06 because i installed a engine driven a/c system and put the condenser over the bottom of the radiator , i needed the fan to run all the time so i could keep air running across the coils, i can not tell any difference in anything including fuel milege and the bus stays in the 70 s all the time without having to keep that gen set running all the time which i found out the hard way is dangerous. try it if you wish |
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