I just recently purchased a D6 4R Tractor Number 4R 1169SP with a Cable Control Unit number 1E 2721D 6. I am new to these tractors and am not sure how to identify the year or model number of the tractor or the CCU can anyone help. Also I would like to find a book for the CCU. The tractor runs great I have had it for 2 weeks now and have done a lot of work to it but I was running it the other day and the CCU started smoking I shut it down checked the fluid in the PTO then drained it and filled it back up with 80-90 weight gear oil since I have owned it the CCU makes noise when I engage the master clutch things are spinning in there as long as the master clutch is engaged and I am not sure what to do next any help would be much appreciated thanks ill add some pics as well

Should be 1941, just before the war. Looks like a good tractor . Cant help you with the ccu but you can find manuals for sale on the club website and Ebay

Probably have some bad bearings in the CCU making it sound bad. I guess you could just have a clutch dragging and getting hot instead of something more serious. Does the CCU tend to wind up any slack in the cable even when you aren’t pulling the lever? Still could be a clutch dragging but the brake is holding it from spinning.

The CCU has one lever controlling both clutch and brake, so the internals must be adjusted so the brake comes off just as the clutch engages so you don’t get a drop every time before you lift. On the opposite end of things, the brake needs to release while the drum is turning. The adjustment takes care of all that. The brake tension is a separate adjustment so if it’s not holding securely, start with that first. I’ve tried to run one that wouldn’t hold and it does get hot because you’re using the clutch all the time trying to keep the blade up.

It’s also possible you’re trying to “feather” it too much. You need to adjust the blade position with quick movements of the control lever and then always let it return to the neutral/hold position. You can’t “ride” it without it getting hot.

Another thing is which drum got hot? You could have something stuck in the unused side.

Probably should start by adjusting it to spec and see if that helps.

I may have the parts and service manuals for that ccu I will check tomorrow

The 1E2501-up series is a #23 CCU, much like the #25 and typically used on the 4R/5R D6 and the 7m and 3T D7.

"657cat" wrote:

I may have the parts and service manuals for that ccu I will check tomorrow

that would be awesome

"Old wrote:

The 1E2501-up series is a #23 CCU, much like the #25 and typically used on the 4R/5R D6 and the 7m and 3T D7.

thanks a lot Old Magnet I really appreciate it

"d2gary" wrote:

Should be 1941, just before the war. Looks like a good tractor . Cant help you with the ccu but you can find manuals for sale on the club website and Ebay

thanks it runs great

"ccjersey" wrote:

Probably have some bad bearings in the CCU making it sound bad. I guess you could just have a clutch dragging and getting hot instead of something more serious. Does the CCU tend to wind up any slack in the cable even when you aren’t pulling the lever?

It does not pick up slack when I'm not pulling the lever.

Still could be a clutch dragging but the brake is holding it from spinning.

The CCU has one lever controlling both clutch and brake, so the internals must be adjusted so the brake comes off just as the clutch engages so you don’t get a drop every time before you lift. On the opposite end of things, the brake needs to release while the drum is turning. The adjustment takes care of all that. The brake tension is a separate adjustment so if it’s not holding securely, start with that first.

The blade has eased down once or twice when I was not touching the lever when I first got it but it has stopped since then.

I’ve tried to run one that wouldn’t hold and it does get hot because you’re using the clutch all the time trying to keep the blade up.

Does it get hot even if you are not holding the lever to hold the blade up meaning if the brake isn't tight enough is the clutch somehow still engaged

It’s also possible you’re trying to “feather” it too much. You need to adjust the blade position with quick movements of the control lever and then always let it return to the neutral/hold position.

I could have been fathering it a bit I won't anymore thanks

You can’t “ride” it without it getting hot.

Another thing is which drum got hot?

Both I think but I know the blade side was hot the PTO was only about halfway full of gear oil I drained it and filled it back up so that may help

You could have something stuck in the unused side.

Probably should start by adjusting it to spec and see if that helps.

I noticed yesterday that the unused drum side collar is out further than the used side and a toothed disc is loose I'm going to take it apart and see if I can snug all the guts back in today I think that is the side making the noise as far as over heating the blade side of the drum I will try to make some adjustments as well thanks a lot for the reply I really appreciate it

"d2gary" wrote:

Should be 1941, just before the war. Looks like a good tractor . Cant help you with the ccu but you can find manuals for sale on the club website and Ebay

World War 2 started in 1939.