southwester Posted December 11, 2013 Report Share Posted December 11, 2013 Hi After my engine being apart and I am putting the clutch fluid on my rev3 back in, in through the master cylinder and out of bleed nipple all the air bubbles seem to be gone after I was purging it through and left it for a few hours but when I now pull the lever in after a few pulls it won't pull back in to the bar (acts like the front brake) the first pump after a purge is ok but gets progressively worse until it will only pull in 1/2 way. Anybody got any ideas about why that is? it wasn't like that before I took it apart:) Quote Link to comment Share on other sites More sharing options...
rij Posted December 11, 2013 Report Share Posted December 11, 2013 Have you got a bit of free play on the lever? If you haven't it can stop the fluid getting back into the master cylinder causing this, or on brakes makes them drag and over heat Rich 1 Quote Link to comment Share on other sites More sharing options...
southwester Posted December 11, 2013 Author Report Share Posted December 11, 2013 Hi Rich Yes there is a bit of play in the lever. Quote Link to comment Share on other sites More sharing options...
lineaway Posted December 11, 2013 Report Share Posted December 11, 2013 Did you have the clutch apart. The pressure plate could be misaligned. Quote Link to comment Share on other sites More sharing options...
tltel Posted December 11, 2013 Report Share Posted December 11, 2013 It does sound like the fluid is not returning to the reservoir, take the rubber boot off behind the lever and make sure the plunger is moving freely. There is a spring in there and they do wear out. TLTEL Quote Link to comment Share on other sites More sharing options...
southwester Posted December 11, 2013 Author Report Share Posted December 11, 2013 Did you have the clutch apart. The pressure plate could be misaligned. Yes I have had all the clutch components completely apart It does sound like the fluid is not returning to the reservoir, take the rubber boot off behind the lever and make sure the plunger is moving freely. There is a spring in there and they do wear out. TLTEL I will check that Quote Link to comment Share on other sites More sharing options...
southwester Posted December 11, 2013 Author Report Share Posted December 11, 2013 The plungers moving freely Quote Link to comment Share on other sites More sharing options...
nelly1 Posted December 11, 2013 Report Share Posted December 11, 2013 is there too much fluid in the resevoir 1 Quote Link to comment Share on other sites More sharing options...
southwester Posted December 12, 2013 Author Report Share Posted December 12, 2013 is there too much fluid in the resevoir I've not got as far as putting the lid on master cylinder left it over night and its still the same and no sign of air. Quote Link to comment Share on other sites More sharing options...
althespanner Posted December 12, 2013 Report Share Posted December 12, 2013 have you lost the ball bearing from between the 2 push rods?if you have the symptoms are as you descibe because the rod is too short and slave piston pumps out against crankcase Quote Link to comment Share on other sites More sharing options...
dan williams Posted December 12, 2013 Report Share Posted December 12, 2013 Easy to misunderstand what you are describing here. I think the key statement is that it is acting like the front brake. The clutch is about as simple an actuating mechanism as you can get. That means the problem is simple to diagnose so no panic. The main difference between the brake and clutch is the clutch is supposed to have sufficient travel in the slave cylinder to take all the fluid the master cylinder can give it. On the brake that slave cylinder's travel is limited so that there is resistance before the master cylinder can be completely emptied of fluid. So if your clutch is acting like the brake something is stopping the slave cylinder before it can absorb all the master cylinder fluid. Two things can cause this, 1. The slave cylinder travel is offset because the spacing between the actuator and the pressure plate is too short and the slave cylinder has treid to compensate by using some of its travel and you are running into the end of the the slave cylinder's travel. This is the most likely scenario and is because some piece got left out or replaced with the wrong piece. Often the ball bearing that decouples the spin of the clutch mechanism from the non-rotating slave cylinder. Other possibilities are missing/ misassembled thrust washers/bearings on the pressure plate. 2. Something is binding in the clutch actuator mechanism. If you pull the clutch cover off make sure the pressure plate is fully engaged with the clutch pack. Actuate the clutch and see if the pressure plate moves. These two things indicate the mechanism is free. Time to disassemble and make sure all the parts are where they belong. My guess is you'll find something not where it is supposed to be. 1 Quote Link to comment Share on other sites More sharing options...
southwester Posted December 12, 2013 Author Report Share Posted December 12, 2013 Thanks for the replys everybody. I didn't put a ball bearing between the 2 push rods I must of missed that when I took it apart! I will disassemble now and have a look at the set up I was hoping to have a blast this weekend so if there is anything else up with it I can get it sorted so I can get a ride or 2 in over Christmas. I've just noticed it looks like there's a leak coming from where the push rod actuated by the lever is sealed into the master cylinder. Cheers Quote Link to comment Share on other sites More sharing options...
southwester Posted December 12, 2013 Author Report Share Posted December 12, 2013 This is the way I had the rods in there there's no bearing only what's in the slave cylinder. So there should be a bearing between the 2 rods? Quote Link to comment Share on other sites More sharing options...
southwester Posted December 12, 2013 Author Report Share Posted December 12, 2013 I just had a look at the motor diagram and it shows a bearing between the 2 push rods and a washer between the pressure plate and thrust bearing which I don't have on there either so this is the problem? I was pretty carefull when I took everything apart so surprised how I've lost 2 pieces! Quote Link to comment Share on other sites More sharing options...
lineaway Posted December 13, 2013 Report Share Posted December 13, 2013 No matter what brand of motorcycle, when you have two clutch push rod`s there is usually a ball bearing. Washer probably was stuck to something you did not notice. Good Luck. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.