450BC
Re: 450BC
Not trying to be rude in this post but I see some confusion. It appears we have been over some of this before. You have asked about this machine before. When you are signed in if you click on your username, you can access your previous thread/posts. You started posting about 450Bs back in 2020. Back in October of 2022 you posted you had 2 machines (this serial number was one) and they had wet steering clutches.
I will also clarify: You periodically adjust dry clutches and brakes. Wet clutches are set up when installed and there is no periodic adjustment to them, only to external linkage, if needed. The brakes have some adjustment procedure, if there is a problem, but nothing on a periodic basis.
Dry or wet clutches in a late 450B (The C designates a 6405 dozer blade attachment.) is always a question. The serial number you posted falls in the 1975 range, and they were building 450Bs into 1976 by the serial numbers. The story is they started putting wet clutches in as dry clutch parts ran out near the end of the 450B production run. No known serial number is publicly known as to what serial number was when they started installing wet steering clutches and brakes. That said being a 1975 serial number, I would expect your father's crawler has dry clutches. Look at the top of the steering clutch housings. If they have a small metal plate cover held in place with five 3/8" x 3/4" hex head capscrews, it will be a dry clutch, the wet clutches did not have that cover. Remove the cover and look inside, it should be dry. If it has the small plate and is full of oil, I will say you have a leaking seal that has allowed a dry clutch compartment to get oil in it. Have you actually looked at and in the steering clutch housings?
Reviewing the Technical manual for it will show you the steering clutch housing and cover plate. If he doesn't have the manuals for it, Stan Disbrow has a thread on this FAQ Board giving you the JD part numbers for the Technical (service) and Operator's manuals (it is about the 17th thread down the list, I think. Use those numbers to find the correct manuals, Lavoy may have them in his store. You can use the online parts catalog for free; here is a link.
PC1170
If you have more questions around this machine, you should post on the Late Models Board, not this FAQ board. You will get more views there for such than you will on this Board.
I will also clarify: You periodically adjust dry clutches and brakes. Wet clutches are set up when installed and there is no periodic adjustment to them, only to external linkage, if needed. The brakes have some adjustment procedure, if there is a problem, but nothing on a periodic basis.
Dry or wet clutches in a late 450B (The C designates a 6405 dozer blade attachment.) is always a question. The serial number you posted falls in the 1975 range, and they were building 450Bs into 1976 by the serial numbers. The story is they started putting wet clutches in as dry clutch parts ran out near the end of the 450B production run. No known serial number is publicly known as to what serial number was when they started installing wet steering clutches and brakes. That said being a 1975 serial number, I would expect your father's crawler has dry clutches. Look at the top of the steering clutch housings. If they have a small metal plate cover held in place with five 3/8" x 3/4" hex head capscrews, it will be a dry clutch, the wet clutches did not have that cover. Remove the cover and look inside, it should be dry. If it has the small plate and is full of oil, I will say you have a leaking seal that has allowed a dry clutch compartment to get oil in it. Have you actually looked at and in the steering clutch housings?
Reviewing the Technical manual for it will show you the steering clutch housing and cover plate. If he doesn't have the manuals for it, Stan Disbrow has a thread on this FAQ Board giving you the JD part numbers for the Technical (service) and Operator's manuals (it is about the 17th thread down the list, I think. Use those numbers to find the correct manuals, Lavoy may have them in his store. You can use the online parts catalog for free; here is a link.
PC1170
If you have more questions around this machine, you should post on the Late Models Board, not this FAQ board. You will get more views there for such than you will on this Board.
Re: 450BC
Sorry for not posting correctly or reposting. I have yet to work on this machine so my bad. Your first paragraph you said it had wet clutches. Then next full explanation said about the metal plate bolted on top each side was dry clutches. Yes both our machines have that plate. So if that is a true quick sign of dry clutches that is what I needed.
Re: 450BC
No problem other than some confusion. In my first paragraph here, I repeated what you previously posted, Oct 23, 2022, in one of your posts you wrote: "my machines are both wet clutches". I (or others reading here) can only work from what you post, I/we can't see it.
If and when JD started with the wet clutches in 450Bs has always been a question. Some have said they have a 450B with wet clutches. Others say JD stopped tagging them as 450Bs and tagged them as 450Cs at that point. Nothing has ever been published about wet clutches in a 450B manual that I am aware of, and it should have been if this was actually done. The end of the 450B run is shown as being after the 450C run started.
The cover plates have to be removed to adjust the steering system of dry clutches, so I assumed you had tried to make the dry adjustments and couldn't access the steering and brake adjustment, at that time, because there were no covers, so no place to adjust, and that is why you said your machines had wet clutches.
You may also need to check adjustments and settings of the hydraulic (power) steering assist system to see that that part of the steering system is working correctly.
I am going to say it is best to take the 5 capscrews out, remove a cover plate, and look inside the steering clutch housing and see if you see what the 450B manual shows for adjustment points. Also, the 3 bolt cover plates on the sides for the brake adjustments. That is the sure tell of what is in there.
Just trying to help you without being able to see it.
If and when JD started with the wet clutches in 450Bs has always been a question. Some have said they have a 450B with wet clutches. Others say JD stopped tagging them as 450Bs and tagged them as 450Cs at that point. Nothing has ever been published about wet clutches in a 450B manual that I am aware of, and it should have been if this was actually done. The end of the 450B run is shown as being after the 450C run started.
The cover plates have to be removed to adjust the steering system of dry clutches, so I assumed you had tried to make the dry adjustments and couldn't access the steering and brake adjustment, at that time, because there were no covers, so no place to adjust, and that is why you said your machines had wet clutches.
You may also need to check adjustments and settings of the hydraulic (power) steering assist system to see that that part of the steering system is working correctly.
I am going to say it is best to take the 5 capscrews out, remove a cover plate, and look inside the steering clutch housing and see if you see what the 450B manual shows for adjustment points. Also, the 3 bolt cover plates on the sides for the brake adjustments. That is the sure tell of what is in there.
Just trying to help you without being able to see it.
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