Case 444

[jobeeler]

I replaced an engine and before I replaced the engine it pull and mow excellent did not have any trouble with the gears it move forward and backwards in high and low range after I changed the engine finally got it running. Now it will not pull it own weight out of a ditch in either high or low I changed all the oil in hydraulic system and the rear end it didn't change a thing so if anyone out there has any input I would appreciate it

 

[Phill Tibbetts]

If it is hydro-static it may be the oil filter in the rear.

 

[Steve@Advance]

Any chance the belt is slipping, wrong pulley, routed wrong, tensioner out of travel?

 

[Timmycornpicker]

Does the engine lug down at all when it's trying to move itself or does it run as if it has no load on it?

 

[Timmycornpicker]

These tractors have a lovejoy coupler between the engine and hydraulic pump. They are not hydrostatic, but hydraulic drive. Pump supplies oil through a direction/speed control valve to a motor which is mounted on the transaxle.

 

[jobeeler]

It don't have a belt on it it is hydraulic driven it has a pump on it

 

[jobeeler]

It runs good on level ground it don't have the power it should have I have to push it up a hill

 

[kencombs]

What oil did you use in the drive system? If it is hyd oil it is not nearly heavy enough. It need 15w40 or 20w50 engine oil.
Check the engine to pump coupling too to be sure it is engaged and not slipping.
Unlikely, but the relief valve may have a broken spring causing it to bypass at low pressure. there are two reliefs in the main valve, one for the drive, the other for the lift.

 

[Timmycornpicker]

First thing to check is the lovejoy coupler is not slipping on the shafts. Is the oil cooler still in place in front of the engine?

 

[jobeeler]

I switched the oil to 20w 50 it didn't help i had changed the motor and the original motor had a one inch shaft coming out of the back of the lovejoy coupler and the one that i put in had an inch and quarter shaft so i went and bought a connector inch and a quarter diameter to put on it and the pump will not flow i change the oil in it twice and it was a little weak in first gear but in second gear it would about pull the wheels off the ground but now i can't even get it to pull out of a small rut in my yard i have to back it up and push it in reverse up my ramp