the diaphram in the fuel lift pump goes bad and leaks fuel into the engine
1994
If the serial number is "G44081", then it is a 1998 model. For other serial number prefix letters, see the related link below for more information on the MF 231, including specifications on the tractor.
1994 as per TracterData.com
I looks like "D" serial numbers are 1995 if you look on this website - http://www.tractordata.com/farm-tractors/000/7/5/754-massey-ferguson-231.html
A MF 231 holds about 9 gallons of hydraulic oil and is added via a plug in top of the transmission housing.
A MF 231 holds about 9 gallons of hydraulic oil and is added via a plug in top of the transmission housing.
231 cubic inch
With Bush and bearing replacement.
"Gallon" is a measure of volume; thus, a gallon of diesel (or any liquid for that matter) has a volume of one gallon, which is 231 cubic inches.
When the diff lock sticks make sure the diff lock lever is able to move freely. If so drive the tractor in 2nd gear with medium rpms. Sharply hit the brake while slightly turning the steering wheel and NOT touching the clutch. It might take a few times but the diff lock should pop out.
Factorizations for 231 are: 1) 231 = 1x231 2) 231 = 3x7x11 3) 231 = 21x11 4) 231 = 3x77 5) 231 = 33x7
Pairs of positive integer factors of 231 are: 1 x 231 = 231 3 x 77 = 231 7 x 33 = 231 11 x 21 = 231 And their reverses.