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Author Topic:   Assault Weapon Clutches
leapinlizard
Dirt Freak

Total posts: 402
posted April 13, 2005 07:48 AM  
Over the weeekend I had problems disengaging the clutch causing me to miss play day. I removed the tranny again and followed the directions to a tee. Still no release. I have fluid movement at the slave, right at 3/4 of an inch on the slave end of the fork. With a 2:1 ratio fork, that means there's 3/8" at the release bearing. Ram say's you need 5/16's or .300" for full release. Yet I can't get anything. can't even start the car in gear. I've dissassemmbled this thing several times this week(4th time) and the only other thing I can think of is a flexing fork. I see no cracks or worn spot's. This clutch worked great for the last eight races of last year. Still worked great when tore the car down in the off season. Ram techs are being no help at all. They keep saying send it to us but I don't have the time or want to miss the first three weeks waiting for them. Anyone have these kind of problems? Any suggestions. If the car doesn't work this week I'm selling it after I beat it to death with a 15 pound sledge.

dm3
Dirt Full Roller

Total posts: 40
posted April 13, 2005 08:41 AM  
I had a similar problem, but I was using the wrong throw-out bearing. I had a short one in and it wouldn't release, we put in the long one and it worked - never bothered to figure out why. But if your setup worked last year and not this year, I would start looking at anything you've replaced ie. throw -out bearing, clutch disc, etc. My clutch is a tilton, so I don't know if this applies, but check to see if the discs are all facing the same direction.

driver27
Dirt Maniac

Total posts: 194
posted April 13, 2005 08:42 AM  
SOme one may correct me, but I think Ram assualt clutch is know as a high cone spring type clutch, which requires more travel than other small clutches such as a tilton, which is know as a low cone clutch. I dont think standard release bearings do a very good job of working with a ram, which is why they sell there own release. Also if memeory serves me, they take a flat faced release bearing. Its been a while since I ran one. Also you need to get the preload on the clutch discs set right, and I dont recall that measurement offhand.

leapinlizard
Dirt Freak

Total posts: 402
posted April 13, 2005 09:06 AM  
DM3, release bearing I ran last yaer and bought from ram. It's a GM long style used in pre 67 trucks.
I'd love to go back to a last years release setup. But the only thing changed was the engine! It doesn't make sense!


driver27, I don't now about all that but Ram techies said .300 travel is what it needs. Ram only accepts tech calls between 1 and 3 today. I'll ask em about what you say. As far as release bearings go the web site recommends a round face bearing. The flat face bearing pushes to much on the out side of the fingers. Preload is set with washers and is still within ram tolerances. That was the first thing checked.

I was looking at the disk themselves. On one side the hub sticks out slightly and the other side the hub is flush with the disc center. On all stock stuff I've done about (30 clutches or so) the hub side that sticks out faces the trans. Looks backward but it ain't. The instructions say this part faces the engine, and to make sure the
hub doesn't hit the bolt heads that retain the clutch to the crank flange. You don't suppose the instructions are wrong do ya?

vosevichs
Dirt Forum Racer

Total posts: 78
posted April 13, 2005 10:56 AM  
Had the same problem last year. had to get a new pressure plate

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Scott Vosevich
RDBoyz Racing

MOD 4s
Dirt Roller

Total posts: 17
posted April 13, 2005 12:12 PM  
make sure pilot bearing and shaft are free spinning in the crank,, This happend to a friend of mine last year.. I think he sucked the tranny up with the bolts and scared up the pilot bearing.

leapinlizard
Dirt Freak

Total posts: 402
posted April 13, 2005 01:10 PM  
I called RAM agian and told them what's up and they said to send it back to em for a rebuild. 4 to 6 weeks later I'll get it back. Our season starts Fri.

Anyone have a good one for sale?

leapinlizard
Dirt Freak

Total posts: 402
posted April 14, 2005 08:59 AM  
Turns out the pilot bearing was actually a one way bearing(turns left but not right) in disquise. Just by pure coincidence I installed it but not before checking that it would fit on the end of the input shaft and gave a few turns. It felt free. Had I turned it the other way...When ever I stuck my finger in the bearing to check for roughness or anything else strange I always happen to turn it the right direction.

After the intial engine fire the bearing would spin the input shaft and not allow engagement of the the dogs. So if the bearing had been installed the other way, I may have never known the real deal.

MOD 4s
Dirt Roller

Total posts: 17
posted April 14, 2005 08:48 PM  
pretty sure pilot bearing was the prob, often times overlooked in clutch problems. Glad you found it.. I have missed three weeks of hot laps do to the new dart iron eagles.....

Mod 4s

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