MF 35 3 pt lift too week

As Gerald says, there are several possible problems - from something as simple as a plugged inlet to a complete rebuild.

You can do preliminary checks through the access cover on the right side (with dipstick), by rolling the right wheel onto a 6x6 to raise the right side above the oil level. You might still have to drain a bit out.

by removing the cover you can check for the swirls Gerald mentions, which indicate blown o-rings - a common problem.

Do you have an I&T Manual? under $25, available from our hosts, and strongly recommended.

Drop me an e-mail or call with further questions - 506-357-6324 most days (incl Sat & Sun) til 5:30 Atlantic.

If there's no filter either the pump is odd or the filter was left out because it had holes in it anyway. The next worst probably thing is that the pump needs to be replaced or rebuilt. Either is fairly expensive. With the side cover off it would be of benefit to check the pressure relief valve and plumbing for leaks. They'd kill off lifting too. The syncronization screw between the pump on the handles can also kill off lifting power. Fixing the pump requires splitting the tractor behind the transmission. That approaches major surgery.

The filter element for my 135 was about $14, without the cups and screw to hold it in place. Could be that the filter shook loose and has messed up the pump control linkage. Time for some dredging. You'll need a strong light and a mirror on a handle to look for oil swirls around the pump pistons and valves and such inside the housing.

On the early MF 35 and MF 65, there was no oil filter. It is an early Mark I pump. Later Mark I and Mark II and III pumps have filters.

It is no problem to take the pump out of the tractor without splitting it behind the transmission.
But, you will need to take off the hydraulic cover under the seat.
NOTE: Unless you are 7 feets tall, and lift 300 lbs..... have a friend to help you so you don't damage the control "sticks" that move the control valve in the pump.
The hydraulic cover has to be lifted at least 12 inches above the centerhouse to get it off.

Bill Brox

: On the early MF 35 and MF 65, there was no oil filter. It is an early Mark I pump. Later Mark I and Mark II and III pumps have filters.

: It is no problem to take the pump out of the tractor without splitting it behind the transmission.
: But, you will need to take off the hydraulic cover under the seat.
: NOTE: Unless you are 7 feets tall, and lift 300 lbs..... have a friend to help you so you don't damage the control "sticks" that move the control valve in the pump.
: The hydraulic cover has to be lifted at least 12 inches above the centerhouse to get it off.

: : Bill Brox

Then you extract the PTO shaft to release the pump?

You can pull out the PTO shaft a little to get the hydraulic pump free, it is maybe the easiest. But, you will then have the chance of a leak of oil after. There is a seal, and an O-ring there. Both can leak after a move.

The other way to take out the pump is to pull out the cotter pin in the spline sleeve in front of the hyd. pump, and then push it forward. The pump will then come free. A friend of mine tried, but the sleeve was stuck for some reason and had to pull the PTO shaft.

On our MF 35 the sleeve was free, and I didn't have to pull the PTO shaft.

If you decide to take out the cotter pin in the sleeve, you can do it more easy if you turn the engine so it is easier to access it, first to press the end together, and then on the opposite side have a hole to pull it out.

I must admit, a bit of a hassle, don't get angry.... just take your time.
But at least safe if you will save the PTO shaft sealing.

Bill Brox