rockshaft problems.
 

I have a 1872 project I am slowly working on. I have been trying to get the rockshaft out. Someone broke the outside lift cam off and did a bad job welding it back on. Anyway, I would like to get it out and either replace it or put a different one in.

Is there a good tried and true way to get these out ?





Thanks Joe

Lots of PB blaster and a large hammer and drift rod and a torch are usually necessary. If you're going to be repainting the frame, build a fire around the rockshaft in the bare frame. It should just about fall out after that.

Wouldn't putting it in a fire take the temper out of the frame and make it week ? And I have been spraying it with PB for a couple days. I haven't even been able to move it enough to see any misalignment in the pin holes yet.


Joe

The frame is not tempered.

Mine actually came apart with a large mallet and a large rod. Course I broke the end off my shaft with a really (not) fun impact at high speed. I think it was enough to break the rust bond. Check out my thread in this section titled "I hate when that happens". I think it's about 3 pages back. The outer rock shaft is no longer avail new. The inner is avail for about $130 if I remember correctly. I bought a complete assembled used shaft from a cub used parts place. They cut the frame and sent it intact for me to get apart. I figured I would just cut the old one out with a sawzall once I had the replacement ready to go. fortunately that wasn't necessary. The replacement gave a good machine shop a fit getting it apart. Lot's of heat and a maxed out 25 ton press.

There has been much posted lately about broken rockshafts on supers. Go to the cub parts look up site. Type in 1872 and follow to attachments-54" plow.
Part 64 (part# 14297) in the diagram is a strap that connects the cross shaft front lift arm to the mower deck lift arm to support the arm. Last I checked they are avail and about $25. I'll have one before winter.

Thanks,
I really don't understand why the outer part of the rockshaft is made the way it is on the 1872. It seems backwards to me. On my 1211 and 1806 the attachment point is up, so when the lift cylinder lengthens or you pull back the lift arm it will roll toward the rear letting it pull on a lift rod from the front. On the 1872 it looks like the attachment point is down,acting opposite of the 1211 and 1806. Is this right or am I just completely missing something. I would like to be able to put my regular 54 snow plow on it.

Forward is forward whether you push from the top or bottom. I understand your point. The supers use "some" different front attachments than the regular GTs. They are lifted by pushing instead of pulling. I discussed this with another member who has one of each not long ago. He has a bracket for one of his top arm machines that moves/extends the arm to the bottom for the snowblower lift. I think it has to do with getting clearance for the steering brake pedals. That's why the supers have it on the bottom. The pedals and the lift rod would interfere with each other.

[QUOTE=squatch;28610]Forward is forward whether you push from the top or bottom. I understand your point. The supers use "some" different front attachments than the regular GTs. They are lifted by pushing instead of pulling. I discussed this with another member who has one of each not long ago. He has a bracket for one of his top arm machines that moves/extends the arm to the bottom for the snowblower lift. I think it has to do with getting clearance for the steering brake pedals. That's why the supers have it on the bottom. The pedals and the lift rod would interfere with each other.[/QUOTE]


Exactly.

Scott

IF you have a complete rock shaft to put back in......just cut out the old one....why the fight?

Scott

I have two other bare frames here. An 1811 and a cyclops something ( rockshaft is on bushings). I have the cyclops rockshaft out. The 1811 won't budge either. I am pondering switching one of them instead. I need to keep everything complete and in working condition in case something doesn't work out right, or I would just cut it out.

But before I go through the trouble on the 1811. Are you guys saying that the habin (spelling) is the only plow setup that will work on the supers ?