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

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

Showing 1 to 10 of 17 results
1
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
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.
Mon, Aug 30, 2021 10:56 PM
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
Video

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

https://drive.google.com/file/d/19REk5syYlmOVqR0bJljLKkMNbgeJMXUQ/view?usp=sharing
Please log in or create an account to join the conversation.
Mon, Aug 30, 2021 11:24 PM
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
Reply to eisenhart:
Video

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

https://drive.google.com/file/d/19REk5syYlmOVqR0bJljLKkMNbgeJMXUQ/view?usp=sharing
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.
Mon, Aug 30, 2021 11:37 PM
neil
Offline
Moderator
Admin
Send a private message to neil
Posts: 6,935
Thank you received: 4
Reply to eisenhart:
Video

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

https://drive.google.com/file/d/19REk5syYlmOVqR0bJljLKkMNbgeJMXUQ/view?usp=sharing
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.
Please log in or create an account to join the conversation.
Mon, Aug 30, 2021 11:37 PM
ChuckC
Offline
Send a private message to ChuckC
Posts: 138
Thank you received: 0
Reply to 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.
Are you sure that the brass collar is in correctly
Please log in or create an account to join the conversation.
Tue, Aug 31, 2021 8:25 AM
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
thanks, I found this diagram in my servicemens reference book.
https://drive.google.com/file/d/1jnVjdmZ7HLlIznzrrWzshjmRbrYB9vfd/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.
Tue, Aug 31, 2021 8:04 PM
edb
Offline
Member
Send a private message to edb
Posts: 4,027
Thank you received: 0
Reply to eisenhart:
thanks, I found this diagram in my servicemens reference book.
https://drive.google.com/file/d/1jnVjdmZ7HLlIznzrrWzshjmRbrYB9vfd/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.
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.
Wed, Sep 1, 2021 9:04 AM
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
Reply to 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.
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.
Wed, Sep 1, 2021 8:00 PM
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
Reply to 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.
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.
Please log in or create an account to join the conversation.
Wed, Sep 1, 2021 8:02 PM
Mike Meyer
Offline
Member
Send a private message to Mike Meyer
Posts: 3,324
Thank you received: 1
Reply to 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.
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.
Thu, Sep 2, 2021 3:21 AM
eisenhart
Topic Author
Offline
Send a private message to eisenhart
Posts: 39
Thank you received: 0
Reply to Mike Meyer:
Can that vertical shaft go in upside down, and did you remove it to fit the new bronze bush?
The shaft was removed to install the bronze bushing. I did have a machine shop make me a new shaft, as the old one had a ton of wear near the top, causing excess play. I thought maybe there was an issue with new shaft, so I reinstalled the old one to test, still won't engage with the clutch brakes.
The vertical shaft isn't upside down. I know this because only the top is machined for the lever key slot.
Please log in or create an account to join the conversation.
Thu, Sep 2, 2021 4:12 AM
Showing 1 to 10 of 17 results
1
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

Veerkamp Open House 2025

Chapter Fifteen

| Placerville, CA

Stradsett Park Vintage Rally

Chapter Two

| Stradsett, Nr Downham Market. Norfolk PE33 9HA UK

Chapter 2 The Link Club's AGM

Chapter Two

| Faulkner Farm, West Drove, Wisbech, Cambridgeshire, PE14 7DP, UK
View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I became a member recently because the wealth of knowledge here is priceless." 
-Chris R

Join Today!