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Ford 4000 gear box oil temperature

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Anssi

08-31-2006 12:54:03




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My Ford 4000 ( 3 cyl ) year 1966 gear box temperature seems to go over 60 degrees celsius when driving on road ( three hours, full power and 8 gear ). I think hydraulic oil are mixed with gear box oil. Gear box oil looks out rather good and gear oil level should be correct. How hot gear box metal temperature is normal when driving on road with maximum speed ( 32 km / h ). Anssi




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sotxbill

09-01-2006 16:56:18




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 Re: Ford 4000 gear box oil temperature in reply to Anssi, 08-31-2006 12:54:03  
dont know about that celcius stuff.. but its common for the trans oil to run at 240 degree F. due the the pressure of the hydraulic pump the fluid is heated a bunch... so yes.. it runs hot... the later series added a cooler to help it as the increased the flow rate of the hydraulic pump so heating became a problem..The pumps went from 6 gallons a minute to 9 gallons a minute... if the hydrulic flow is in a lock postion, the temperature will run higher so make sure your remote hydraulics are in the center position to help stop excess heating. good luck.. bill

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Jerry/MT

09-01-2006 12:34:42




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 Re: Ford 4000 gear box oil temperature in reply to Anssi, 08-31-2006 12:54:03  
I don't know the exact numbers but about 15 % of the shaft horsepower is lost (due to friction, windage, etc) in the driveline and the hydraiulic system had some additinal efficiency losses also. These losses all show up as heat which cause the oil to heat up and then is conducted into the drive line casting which gets warm. The equilibrium temperature depends on the power developed by the engine, the mechanical efficiency of the driveline and hydraulic pump and the ambient temperature. One horsepower loss equates to 42.4 BTU/ min of heat addition. Depending on the specific heat of the oil and the conductivity of the castings, the temperature can get pretty warm.

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Majorman

08-31-2006 23:47:21




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 Re: Ford 4000 gear box oil temperature in reply to Anssi, 08-31-2006 12:54:03  
It should be the same oil in both gearbox and hydraulics. 134D or an oil that has additives to cope with wet disc brakes.

Later models had a common oil with a "dam" between the gearbox and rear axle to keep a set amount of oil in the gearbox.

From the operation you describe the gearbox housing would get pretty hot.



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gerard

08-31-2006 15:42:00




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 Re: Ford 4000 gear box oil temperature in reply to Anssi, 08-31-2006 12:54:03  
Sure it's not an hydraulic issue heating the oil?



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RodInNS

08-31-2006 13:51:47




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 Re: Ford 4000 gear box oil temperature in reply to Anssi, 08-31-2006 12:54:03  
I would not be a bit surprised if those temperatures would exceed 80 C. I've never measured them, but I do know that they will burn you very quickly if you lean against the housing or accidently touch it. I've had it happen... At 60C I don't think I would be too concerned.
You can use either 134D or it's equivelant oil in the transmission, or 80W90 gear lube. If you're in a cold climate, then I would suggest the 134D. HTH.

Rod

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