IH baler disassembly question

[flyingj]

I have a 1983 International Harvester 435 baler. It has been having problems with the pickup cylinder getting bound up. I partially disassembled the pickup cylinder and have found that the (previously repaired) cam that articulates the pickup tines is worn, allowing the cam roller to get over center at one point in it's cycle. I've ordered a replacement cam and rollers from Messicks, however I am having trouble with part of the disassembly in preparation of replacing the cam (Part #10 in the ilustration see URL below).

If you go to Case Ih 435 International Harvester Rectangular Baler (North America) Parts Catalogs and click on "pickup cylinder" there is a parts breakdown of what I'm asking about.


The main shaft in the cylinder that turns the whole pickup assembly has keyways in it near both ends. Two "hubs" (part #3) are attached to the shaft with cross pins and tapered keys (part #21). It appears that these tapered keys are driven in, they have a little hooked part on the inboard end that you must be supposed to pull on to remove the key. My problem is I don't know of any tool that would let me pull it. There is not enough room to get a chisel on the hooked end of the key to drive it out.

Has anybody worked on these? Do you know how I'm supposed to remove these keys? I am close to using the acetelyne torch to loosen things up, but would like to avoid that if possible.

Thanks
Jim Frisby
Palmer,
Alaska

 

[DJ54]

I believe those are known as "jib" keys...

I may be all wet here, but I'm thinking the key will be the last thing off, if even needed to be. I think the purpose of the tang on the key, is more or less to be able to hold in the proper place, while the end on the pickup cylinder, and hub are placed back on the shaft.

So in other words... Off with the hub, then the end. And more than likely, the jib key will stay in the shaft...

I'm a firm believer in using "never seize" on shafts in places like this..., and other items.., where it may need to be taken apart in the distant future.. 'Cause I may be the guy taking it back apart...!!

At 95 bucks a pop for that end, don't want to mess up too many..!!

 

[flyingj]

Thanks for the reply.
I don't see how it will come apart without pulling out at least one of those keys. The hubs need to move toward the center so that the shaft can be removed. The pickup cylinder frame is welded up as one piece, such that the ends cannot be removed. In order to change the cam, I have to move the shaft towards the outer (idle) end (away from the driven end) about 12" to get the end of the shaft inside the frame so the cam can be removed. In order to do that, the hub on the outer end has to slide about 12" toward the center, that key won't let it slide without removing it.

Anyone else have any ideas?

Thanks again,
Jim

I believe those are known as "jib" keys...

I may be all wet here, but I'm thinking the key will be the last thing off, if even needed to be. I think the purpose of the tang on the key, is more or less to be able to hold in the proper place, while the end on the pickup cylinder, and hub are placed back on the shaft.

So in other words... Off with the hub, then the end. And more than likely, the jib key will stay in the shaft...

I'm a firm believer in using "never seize" on shafts in places like this..., and other items.., where it may need to be taken apart in the distant future.. 'Cause I may be the guy taking it back apart...!!

At 95 bucks a pop for that end, don't want to mess up too many..!!

[/I]

 

[DJ54]

Sorry,
In the exploded view it appeared that that end came off.

I looked on the Case IH site, and they do offer a service manual for these balers. $72 + some change... It may be a good investment.

 

[Larry Jones]

What I have used on them is steel wedges, slide hammers, gear pullers, end wrenches, lots of cussing. I was working on indoors industrial equipment but they can be a task getting out.

 

[RickB]

Components assembled using jib keys are disassembled thusly:

After cleaning the shaft thoroughly on both sides of the hub, drive the hub (or sprocket, pulley, whatever) away from the head of the jib key. Once the hub moves on the shaft, remove the key and remove the hub from the shaft in the necessary direction.

 

[flyingj]

I bought a service manual for it from SSB tractor (a reprint with poor photographs) however the chapter on the pickup cylinder does not address anything beyond removing the tine bars. Nothing about the gib keys or the main shaft. I will try some of the suggestions below. Thanks to all.
Jim

Sorry,
In the exploded view it appeared that that end came off.

I looked on the Case IH site, and they do offer a service manual for these balers. $72 + some change... It may be a good investment.