1. The crankcase breather may be plugged. or----
2. Too much crankcase pressure. There is too much blowby (combustion gasses leaking by the rings or piston), causing excessive pressure in the crankcase. To repair this, you will need to re-ring or bore out the engine with new pistons and rings.
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Dipstick
Engine oil dipstick? Could be the PCV system is inoperative or the engine has excessive blow-by.
under the seat of tractor is the hydraulic reservoir. fill it to the line on the dipstick.
On a SAME Explorer tractor, the hydraulic dipstick is typically located near the rear of the tractor, often near the hydraulic reservoir. It can usually be found on the right side, close to the three-point hitch area. To check the hydraulic fluid level, you need to remove the dipstick, wipe it clean, and then reinsert it to get an accurate reading. Always consult the operator's manual for specific details related to your tractor model.
Dipstick on transmission top-right
directly below the parking brake their should be a dipstick going through the floor platform. between your feet when you are on the tractor.
The hydraulic reservoir on the case 730 should be in about the same area as the case 630......on the right side of the tractor at the rear of the engine and on what would be the bell housing is a large cap screw type plug. There should be a dipstick not too far from it....you add hydraulic oil there, if it is a case-o-matic. If it is a standard transmission, then the dipstick and the plug should be on the rear of the tractor around where the seat bolts on.
there is a check valve in the oil system that is stuck open over filling the oil tank will cause the dipstick to blow out of oiltank
restricted return fluid
On a Ford 1220 tractor, the engine oil dipstick is typically located on the right side of the engine block, near the oil filler cap. It may be a long, slender tube with a looped handle for easy access. To check the oil level, simply remove the dipstick, wipe it clean, reinsert it, and then pull it out again to check the oil level. Always ensure the tractor is on a level surface for an accurate reading.