• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Clark Michigan 55B

C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
Looking for part number 961122
Master cylinder repair kit.
Or brake power cluster repair kit if going by the book.

Possible superceded part numbers.

Any help appreciated.
 
W

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,480
Location
Canada
From what I've seen a good brake shop may be able to match it. Maybe Minnpar would have some parts too.
 
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
Another place that may be worth contacting:
https://www.amazon.com/Wagner-Repair-Cluster-Parts-Included/dp/B07LGGGKCD#descriptionAndDetails

I have know idea of their knowledge but they do list parts for Power Clusters. A couple things to keep in mind is what is the bore of the hydraulic master cylinder and what is the diameter of the air chamber? Next what fluid is this going to be working with? DOT3 or mineral oil. Use the wrong fluid with the wrong seals and your brakes won't last long!

I see these complete assemblies are sometimes being offered for $1,000 or more. And to think I probably tossed a few rebuildable ones in scrap trailer 15 years ago and the rebuild kits went in the trash!
 
C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
There's definitely no brake shops where I'm at and even the repair shops are iffy.
Especially if it wasn't something built 5 or less years ago.

I'm pretty sure we cleaned out an semi trailer worth of old Cat and Clark Michigan loader parts when we sold the farm 20 years ago.
No doubt what I need was probably in there still in the packaging.

I was hoping the repair kit number had been superseded.
Myself I don't think my loader is that old being from 1977.
Most little things have been updated.
This is the only part number I'm stumped on.
I searched Minn Par but nothing came up.
Maybe I'll have to give them a jingle.
 
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
chipped tooth said:
There's definitely no brake shops where I'm at and even the repair shops are iffy.
Especially if it wasn't something built 5 or less years ago.

I'm pretty sure we cleaned out an semi trailer worth of old Cat and Clark Michigan loader parts when we sold the farm 20 years ago.
No doubt what I need was probably in there still in the packaging.

I was hoping the repair kit number had been superseded.
Myself I don't think my loader is that old being from 1977.
Most little things have been updated.
This is the only part number I'm stumped on.
I searched Minn Par but nothing came up.
Maybe I'll have to give them a jingle.
Click to expand...

Do you have a casting number off the master cylinder, often cast right in the side.
What is the diameter of the bore a parts house may be able to match up some parts from that.
Like I asked above what fluid is this going to be using, mineral oil or DOT3 brake fluid.
One more what is the diameter of the air side of the cluster?
And how about posting a picture of the assembly? I'm assuming you have the original one, if so what is wrong with it?
 
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
I have another post i made a while back on here describing my issue.
I just replied with an update on it a day or so before making this post.

I haven't taken it apart and probably won't until I can find the repair kit.

It still stops but doesn't hold.
DOT 3 is what it uses.
I'll see if I can add a link to my other post.
 
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
Reading the other post where you say fluid is coming between the master and air side of power cluster makes me think you might be able to get it working with just the kit for the master cylinder.

If you can find a number cast in the side of master there is a chance we might be able to figure out the bore of the master and find a kit to rebuild it. Biggest problem might be how good the bore is, hopefully it will be good enough to clean up with a brake hone and get it working again.

Wish you had a NAPA dealer with some grey haired old guys behind the counter as you could probably find parts enough to rebuild the hydraulic end of that cluster for about $20.00. Problem now days if you don't have a make model and such for a 5 year or newer car most parts people have no idea of how to find things on their computers!
 
Last edited:
C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
Only thing I could see on it was
CAT USA on the reservoir
And 6874 just above the cylinder part
 

Attachments

  • 20201009_140427.jpg
    20201009_140427.jpg
    1.5 MB · Views: 11
  • 20201009_140438.jpg
    20201009_140438.jpg
    1.6 MB · Views: 10
  • 20201009_140656.jpg
    20201009_140656.jpg
    2.6 MB · Views: 10
W

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
12,480
Location
Canada
Wonder if someone changed it in the past but if it's a Cat part might not be too hard to get a rebuild kit.
 
C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
It's possible, here is an screen shot of my parts book I downloaded from Minnpar
 

Attachments

  • 20201009_143213.jpg
    20201009_143213.jpg
    106.3 KB · Views: 9
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
Well here is what Cat used on a 950 Front end loader, two different power clusters depending on serial number:
950 brake chamber.png 950 brake chamber 5K3663.png

Biggest problem I'm having is not finding the size of the cylinder, air or hydraulic sides!
 
Last edited:
C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
The bottom pic looks identical to what I have!
Mine has a rod and another shorter rod with a male wire spade on it.

When air is applied both those rods move out.
 
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
chipped tooth said:
The bottom pic looks identical to what I have!
Mine has a rod and another shorter rod with a male wire spade on it.

When air is applied both those rods move out.
Click to expand...
That smaller rod with the wire spade is only there to work a dash light to let you know the master is over-stroking. That would let you know either you have air in the line from the master to the wheel brake or a leak either in the master or somewhere else in the system.

And yes depending on where and who is using the power cluster they may have different mounting systems.
 
C

chipped tooth

Active Member
Joined
Nov 3, 2016
Messages
40
Location
Minnesota
After doing some research I'm pretty sure that cylinder isn't a cat part.

Mounting is completely different.
I took a couple pics of the front cylinder and it's identical to the rear.
Has FE 777 on it?
Not sure if that means anything.

I'm still gonna try and get the repair kit for my loader.
I pretty sure the cylinders are both Clark Michigan parts.
 

Attachments

  • 20201013_135703.jpg
    20201013_135703.jpg
    3.1 MB · Views: 7
  • 20201013_135738.jpg
    20201013_135738.jpg
    2.2 MB · Views: 7
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
Last edited:
kshansen

kshansen

Senior Member
Joined
Mar 11, 2012
Messages
11,158
Location
Central New York, USA
Occupation
Retired Mechanic in Stone Quarry
Did a little more searching and contacted NAPA online and they say this cylinder should work:

https://www.napaonline.com/en/p/NMAM2842?keywordInput=m2842

The guy I was contacting with did not know if there was a "Kit" for that cylinder that would fit your master but you could contact your local NAPA dealer for that information. Looks like this one may have more ports than you might need but they could be plugged if not needed.

And $223.00 for a new cylinder is not too bad.
 
You must log in or register to reply here.
Top