Clutch

AlanBartlett · Post by **AlanBartlett** » Thu Jun 14, 2007 7:53 am

How do you tighten up the clutch fingers? I've nocticed its a little pin through the middle with split pins each side, I'd like to tighten them because they clan when I turn them over on the electric start and handle. Also does the bearing in front of the flywheel nut have a gap between the nut or does it go straight to the nut?

PAUL BEAUMONT · Post by **PAUL BEAUMONT** » Mon Jun 18, 2007 11:14 pm

Alan, do you have a Jowett instruction book for your 7? If you do there is a section on adjusting the clutch. Essentially the toggle levers are adjusted by the small nut and grub screw that passes through them. On the CB Bradford the manual says that there should be 1/16" clearance between the toggle lever and the thrust bearing. You need to try to get all 3 as even as you possibly can. Sometimes the levers are very worn where the thrust bearing presses against them. They need a slight radius to the face that contacts the thrust bearing to work smoothly.
As for the bearing on the end of the crankshaft - there is a small section washer fitted after the nut and before the bearing, so as to ensure that the inner part of the bearing can press up hard, whilst ensuring that the outer is always free to turn. If you lock both the inner and outer rings of the bearing onto the big nut your clutch will not work!

Keith Andrews · Post by **Keith Andrews** » Tue Jun 19, 2007 9:01 pm

Just to add to Paul above....
If it is similar to the bradford....
look at the shaft that twists and moves the trust bearing...the bushes each side of the gearbox case...
If these are too worn it can be difficult to adjust the clutch correctly..
Also this can cause the shaft and thrust bearing to rattle when not under load

AlanBartlett · Post by **AlanBartlett** » Tue Jun 19, 2007 9:10 pm

Hi, Cheers for the comments, turns out it wasnt the clutch at all, it was bruising on the teeth between the starter and flywheel so when they into mesh it makes a loud clanging/ thumping noise which i have still yet to solve the problem but at least now I know what it is, but with some emery paper and files the problem should be solved at the weekend

Cheers Paul and Keith

Tony Fearn · Post by **Tony Fearn** » Mon Jun 25, 2007 11:58 pm

Alan,

Re-visit my post of 11th May under the 'Flywheels' heading and count the teeth on the original and the substituted flywheels.

If there are the same number on both flywheels then ok, but if they differ it might suggest a cause for "clangs and thumps".

Also, make sure that you put the floorboards in and have the clutch pedal lever hard against them in the engine compartment before adjusting the gap on the three toggle levers.

There isn't much room to do this on 'Mary Ellen' so I've made a little door in the floorboard, under the carpet, so I can adjust from the cockpit. Prior to this I tied a piece of string to each of the spanner and screwdriver for ease of retrieval if either fell down into the flywheel housing during adjustment.

Tony.

AlanBartlett · Post by **AlanBartlett** » Tue Jun 26, 2007 6:52 am

Hi tony,

Yeah I do remember your post about teeth numbers, I did count it 4 or 5 times just to make sure, they do both have the same amount of teeth. As for the clutch, I've recently connected it and adjusted the rods accordingly and now I am a working clutch.

Cheers for posting