hydro

[Bear]

Anyone know what to look for.On a 3415 vickers hydro in forward motion stops then goes. Jerks forward so bad about throws you out of seat.Oil res. is full.You move hydro from reverse to forward very jumpy.

[BLT]

How about the belt tension for starts.

[Marty-MN]

check the bevel gear box mounting bolts front and side.if loose they will cause the slowing and jerking sometimes raise the front wheels.

[Talntedmrgreen]

Yeah, sounds like something in the belt system (belt/BGB/pulleys), providing intermittent pump power. The Vickers are smooth as silk, otherwise.

[JimDk]

Ditto on the loose bolts. The 4 in front were loose on my Vickers. It was a real "bucking bronco".

[rfsmith1952]

Ditto ditto on the loose bolts. Three were loose, one was gone. Fixed that and it's smooth as silk now.

[Burntime]

I have seen the four bolts that hold the tractor halves together loosen up and do the exact same thing. I would check that as well. It was like being on a bronco! The bolts had actually worn the threads off from wearing. 4 new bolts and away I went, smooth as silk!