Over the years we had two MF 135's and one MF 150. Those tractors did more hard work and had more hours on them than any tractor before or since on this farm. The 150 when I sold it to my BIL had 5,600 hrs on it. Had 7200 on it when he sold it. Had one clutch put in up to that point.
We pulled 3 bottom 16's with them all. The only weak point I saw with any of them was the ring gear and pinion. Every one of them chipped and MF had an upgrade to replace the oem that was far better than what came in the tractor.
One reason they pulled so well for their size is where the lift arms are connected under the axle. It's not far from being in front of the axle. That gave them a lot of down force.
I don't know if any of you MF folks know this but. If the tractor were to cut off and can't start it in the field with the lift down and the implement in the ground: 1. put the pto in grear(540). 2. take the transmission out of gear.3. Lock the brake. 4. reach down and grab the pto shaft or put something through the hole and rock the pto shaft back and forth. You can raise the lift without the engine running. I guess that was some pretty worthless info. /forums/images/graemlins/smile.gif Unless you need to tow that tractor out without leaving the implement in the field. But I thought it was a pretty nice option.
Pound for pound those MF's(135 and 150) were the best tractors ever on this farm.