mf1250 4x4 problem

[dbail]

jeepcj7 is right. they had .008 space before it would start pushing the shaft throught the bearing. that not much wearing on the bushings. i shortend the shaft by 3/8

 

[Workstead]

jeepcj7 is right. they had .008 space before it would start pushing the shaft throught the bearing. that not much wearing on the bushings. i shortend the shaft by 3/8

Thanks Dbail and jeepcj and California.

Do you have any pictures of what you did and how you did it?

Clem

 

[dbail]

workstead the 4 wheel drive goes in and out by sliding a gear back and forth. i don't think the shaft is your problem

 

[Workstead]

workstead the 4 wheel drive goes in and out by sliding a gear back and forth. i don't think the shaft is your problem

I didn't know if they were related. I do have an FEL and I don't want to go through what you just went through. There may be 2 different issues dealing with 4WD.

1. Shaft is too long. Needs to be shortened.

2. 4WD shift lever is hard to operate. I'll look at the linkage when I lift one front wheel to see if it will slide in and out of 4WD.

Clem

 

[lmalcomb]

May 2007 shaft lentgh was shortened in production from 470 mm to 468 mm. Can shorten a little more if you want to. When tractor has loader on it and there is a load in the bucket it puts the tractor under compression and causes the front drive shaft to bottom out a, hence the reason to shorten the shaft.

May 2007 was the Massey 1250 still in production in May 07 or was this may of 97 ? My tractor is a 99

 

[Workstead]

May 2007 shaft lentgh was shortened in production from 470 mm to 468 mm. Can shorten a little more if you want to. When tractor has loader on it and there is a load in the bucket it puts the tractor under compression and causes the front drive shaft to bottom out a, hence the reason to shorten the shaft.

My MF1250 is a 1998. I wonder if dbail has an earlier model. Maybe I dodged a bullet on my purchase.

Clem

 

[wrenchturner]

I also have a MF 1250 and was wondering about the driveshaft clearance problem. I know there is some flex in the engine and transmission assembly but I would not think more than a couple of throusandths of an inch max. I believe a more plausible explanation for the lack of clearance between the driveshaft and the transmission has to do with the front axle. The front axle pivot has a tapered bushing and as the bushing wears this causes the axle to to be able to move farther back during certain conditions such as when the front wheels are being overdriven in 4wd or when backing in certain situations. Perhaps the engineers did not forsee this problem when allowing for driveshaft clearance. If this is not the case, then the engine to transmission bell housing bolts would have to be loose.

 

[dbail]

you hit the nail on the head. front bushing wearing more than .008 and now the shaft will start pushing on the rear bearing. I'm going to look at the front axle next. my 1250 is a 1994 with 960hr. on it. by shorten the shaft you should no problems with the rear bearing.

 

[dbail]

i took the front axe off today, the bushing look good. i had the dealer look at them. i'm going to replace the knuckle seals slight leak. $60 a piece! when i'm done this tractor will last me a life time. I really like this tractor. its the right size for snowplowing and pulling out wood

 

[wrenchturner]

I really like my 1250 although there are a few design issues I do not like. My knee hits the front end loader lever while mowing and causes the bucket to lower. The hydraulic hoses on the back are a little cluttered. The enigne cover is not easy to remove. On the other hand it is just the size and weight I need and has done everything I have asked it to do. I plan on this being the only tractor I will ever buy.

The bushing you were refering to, is it the axle pivot bushing?