annettee66
New member
need the torque spec for head bolts rod and main john deere 750 with a yanmar 3t80uj
john deere 750 torque specs
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- john deere 750
First 29 ft lbs, 2nd 58 ft lbs, last 72-79ft lbs working from middle toward ends. Rod bolts 16.6 to 20.2 ft lbs. I have basically the same engine as you in my ym2002d. It is a 3t80u-nap. This information came out of a ym220/226 manual which has a 3t75ha engine. Closest to my grey market per Hoye. I have checked out part numbers and know the head bolts are both m12. Part numbers are the same on rod bolts so I have confidence the numbers are correct and would bet a dollar to a donut they are correct for you also. Proceed at your own risk. 
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annettee66
New member
ok thanks , now can you tell me if fuel could be getting inti crankcase from the injector pump . I have fuel coming out from around the pump where the shims are . was told there are no gasket there just shims , so could the fuel be getting into crank case from there ? Have not pulled pump yet thats next . Thanks
buickanddeere
Super Member
A few sentences on the Internet is a poor substitute for an operators and service manual. There are many more important specs to check.
1-800-522-7448
1-800-522-7448
Yes, fuel can get into the crankcase from there. If you have fuel in the crankcase that is most likely where it is coming from.
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annettee66
New member
fuel is coming around the shims tried to tighten but was not loose so ill take off and check
What is the level in your crankcase??
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annettee66
New member
crankcase showes full to top mark
Are you sure diesel is not running down from the injector pump lines, either suction or injector lines? Reason I ask is that if your pump was leaking into the crankcase it should overfill the crankcase before it starts coming out around the shims.
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annettee66
New member
just checked its bubbling out around base of pump where it touches block .
