ACMOC
Login
ACMOC
Cat D-2 5J clutch brake.

Cat D-2 5J clutch brake.

Showing 1 to 4 of 4 results
Flathead
Topic Author
Offline
Member
Send a private message to Flathead
Posts: 36
Thank you received: 0
I can't get the clutch brake to stop the transmission from spinning when I apply the clutch brake. The trans oil seal was torn when I took it apart the first time, so there was some gear oil in the clutch compartment but not bad. Can the clutch brake be so oil soaked that it won't apply or is the clutch not releasing. The pilot roller brg. is good. The three small springs that help release the clutch disc are good. I can see the clutch brake come in contact with the friction material too. The friction material is about 3/16 to 1/4 inch thick.
I can change gears if I'm quick shifting! This is the second time I've had the engine off to repair this problem, I thought I had it repaired the first time...
Please log in or create an account to join the conversation.
Sat, Jan 16, 2021 5:41 AM
neil
Offline
Moderator
Admin
Send a private message to neil
Posts: 6,932
Thank you received: 4
It definitely doesn't help if the clutch brake is soaked with oil. Rinse it off with some kerosine - get the brush in there and give it all a good clean - the friction and the back of the throwout where it bears. You can use some gas in a pinch if necessary - remove the plug from the bottom of the case to let the build-up out. If the pilot is good, it should stop easily with a clean brake. If it still doesn't, then check that there isn't some foreign material in there binding on the clutch plates. If that's good, then I would actually suspect the pilot bearing.
Please log in or create an account to join the conversation.
Sat, Jan 16, 2021 7:39 AM
ol Grump
Offline
Send a private message to ol Grump
Posts: 1,077
Thank you received: 0
Reply to neil:
It definitely doesn't help if the clutch brake is soaked with oil. Rinse it off with some kerosine - get the brush in there and give it all a good clean - the friction and the back of the throwout where it bears. You can use some gas in a pinch if necessary - remove the plug from the bottom of the case to let the build-up out. If the pilot is good, it should stop easily with a clean brake. If it still doesn't, then check that there isn't some foreign material in there binding on the clutch plates. If that's good, then I would actually suspect the pilot bearing.
I had one D2 that the previous owner had over greased the pilot bearing and the grease was holding the clutch disc to the flywheel. When good and warm all was well but cold, the clutch brake was useless. Engaging and disengaging the clutch was problematic, specially in tight quarters. Kick the clutch out and stand on the brakes was the order of the day until everything warmed up.

I put a couple gallons of diesel in the clutch housing and proceeded to work the clutch lever, turn engine about a third of a turn, more working the clutch lever, another 1/3 turn and more on the clutch lever. After about an hour, I could hear the clutch disc finally get loose. Drained the diesel and that, as they say was that.
Please log in or create an account to join the conversation.
Sat, Jan 16, 2021 7:42 PM
Flathead
Topic Author
Offline
Member
Send a private message to Flathead
Posts: 36
Thank you received: 0
Reply to neil:
It definitely doesn't help if the clutch brake is soaked with oil. Rinse it off with some kerosine - get the brush in there and give it all a good clean - the friction and the back of the throwout where it bears. You can use some gas in a pinch if necessary - remove the plug from the bottom of the case to let the build-up out. If the pilot is good, it should stop easily with a clean brake. If it still doesn't, then check that there isn't some foreign material in there binding on the clutch plates. If that's good, then I would actually suspect the pilot bearing.
Thank you, yes, the pilot bearing will be changed out, even though it looks good. Cat has them$
Please log in or create an account to join the conversation.
Sun, Jan 17, 2021 5:30 AM
Flathead
Topic Author
Offline
Member
Send a private message to Flathead
Posts: 36
Thank you received: 0
Reply to Flathead:
Thank you, yes, the pilot bearing will be changed out, even though it looks good. Cat has them$
Okay, I figured it out! I did purchase clutch brakes from Florin Tractor. They have been very helpful. But I realized that the fiber disc in the clutch was 3/4” thick, my 5J uses a 1/2” thick disc. Which are very hard to find. So I chucked my disc in my lathe and turned it down to 1/2”. Works great! The old clutch brake was oil soaked, I heated it on my shop stove, lots of nasty gear oil bubbled out, then soaked in gasoline to finish the process. So now I have a spare clutch brake set.
Please log in or create an account to join the conversation.
Sun, Feb 7, 2021 9:43 AM
Showing 1 to 4 of 4 results
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

Wheatlands Warracknabeal Easter Rally

Chapter Nineteen

| 34 Henty Hwy, Warracknabeal

Veerkamp Open House 2025

Chapter Fifteen

| Placerville, CA

Stradsett Park Vintage Rally

Chapter Two

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