acmoc

ACMOC Membership Benefits

  • FREE quarterly magazine filled with content about antique Caterpillar machines
  • FREE classified listings
  • ACMOC store discounts and specials
  • Full Bulletin Board Access
    • Marketplace (For Sale/Wanted)
    • Technical Library
    • Post attachments

$40 /year ELECTRONIC

$55 /year USA

$67 /year International

d2 main clutch brake - pushing the lever forward doesn't engage the brake

More
1 month 3 weeks ago #231059 by eisenhart
I'm doing work on my 1952 d2 5U main clutch assembly and specially having an issue with the main clutch brake. The tractor is split atm.
I'm having trouble getting the spider assembly to interact with the actual clutch brake discs. 
I have the spacer tube indexed with the clutch spider and it still won't reach the clutch brake discs. It's nearly 1/4inch from touching the brake discs when I push the control lever all the way forward.
I have a new clutch disc installed and I have the pressure plates surface grinded. 
Someone suggested that my main clutch disc is too thick? Anyone have any additional thoughts?
I was thinking I could put some spacers behind the clutch disc brake plates and that would solve my issue.
I'll post a video shortly. Thanks, Jonathan

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231061 by eisenhart
Video

I added some washers to the one clutch brake retainer plate to mimic the spacer I was thinking of making.

drive.google.com/file/d/19REk5syYlmOVqR0...XUQ/view?usp=sharing

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231063 by eisenhart
last night I ended up installing my old thinner main clutch disc in the assembly, I adjusted it(what a pain) and I'm really liking the lever engagement pressure and throw distance. The over center engagement feels great. It's still not traveling far enough to engage with the clutch brakes, when I push the lever all the way forward. I'm at a loss what the issue could be. But I feel like adding the spacer plate would remedy this issue.

I noticed if I push the lever foward to engage the clutch brake and I simultaneously spin the pressure plate, there is some sort of resistance, just like the brake is enagaged, but they clearly aren't touching. What the heck is going on? I don't have 3 hands to take a video of this. Hope this makes sense the way I described it.

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231064 by neil
Eddie B has guidance on here for the correct set up of the clutch and brake. There's a sequence it has to be done in so that all the relationships are correct. If you take a look at the serviceman's reference in the Tech Library, it will show you the procedure to set it up. If you've followed all of that, then something might not be within spec.

Cheers,
Neil

Pittsford, NY

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231072 by ChuckC
Are you sure that the brass collar is in correctly
The following user(s) said Thank You: eisenhart

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231083 by eisenhart
thanks, I found this diagram in my servicemens reference book.
drive.google.com/file/d/1jnVjdmZ7HLlIznz...vfd/view?usp=sharing

I checked numbers 5 and 7 for correct clearance last night. The top didn't have any clearance, so that's part of my problem. Still trying to fix this. Will report back soon if that resolves my issue.

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231098 by edb
Hi Team,
something I have encountered is that the vertical actuation shaft woodruff keys have been aligned to the split in either lever instead of the key slot in the relevant lever--this puts the levers out of phase and so can cause reduced clutch engagement motion in one direction or the other.
Another lost motion area to check is to the top vert. shaft and its bushing if fitted--if not then the shaft bore in the top case needs machining to take a suitable bush and even a dirt seal.
Also check if the upper vertical shaft lever is not fouling the floor plate due to the shaft/bush wear described above.

Cheers,
Eddie B.

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231116 by eisenhart
Hi, I adjusted the yoke and collar clearance last night per the servicemens manual. The assembly still won't pivot far enough to touch the clutch brake plates. Previously I had a local machine shop make a bronze bushing for the top vertical shaft, so there is no play with that piece. I still can't figure out my issue. There has to be something I'm missing with this.

Would any additional video of this help? If so, what do you want to see exactly? thanks for your help so far.

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231117 by eisenhart
I confirmed the keys for the lever and yoke forks are in the machined slots, and not in the splits where the bolts are tightened.
The following user(s) said Thank You: edb

Please Log in or Create an account to join the conversation.

More
1 month 3 weeks ago #231124 by Mike Meyer
Can that vertical shaft go in upside down, and did you remove it to fit the new bronze bush?

Please Log in or Create an account to join the conversation.

Time to create page: 0.153 seconds
Go to top