R80/7 clutch operating mechanism

[jepsen]

Hey Guys
My clutch operating mechanism really needs an overhaul. But how do I get the thrust washer out, no 3 in attached file?

[gspd]

If you can't get it out with a small hook type tool, circlip type opening pliers, or strong magnet, you'll have to remove (or at least partially back out) the transmission and push it out with the rod (#1). The clutch end of that rod may be stuck in the clutch center disc and need a little finesse to remove. Replace felt seal (#2) while you have it apart.

[Rob Frankham]

Use a pair of long nosed pliers and grip the end of the pushrod pulling it back and exposing the thrust race. You can't actually remove the pushrod without moving the engine because will foul the frame. It might take a bit of pull because of the felt but it won't be stuck in the disc (or if it is you have a real problem), because on the earlier clutch the tapered end of the rod simply butts up againsta tapered recess in the centre of the disc.

If you have clutch problems, you might be advised to pull the gearbox and examine the engine end of the mechanism. It isn't unheard of for the pushrod and clutch disc to wear badly at the point of contact to the extent that the disc wears through completely.

Rob

[barryh]

Won't the pushrod come out if the swinging arm pins are removed the swinging arm pulled back a few inches ?

[Kurt in S.A.]

I think it takes more than a few inches to extract the rod from the rear. If you pull the rod out too far from the rear, the only...or certainly easier...way of getting it back in is to reinsert from the front. Years ago I tried to put the rod back in with the trans out but could never find an easy way to secure the felt enough to get it back in. Much easier when I came around from the front.

Kurt in S.A.

[jepsen]

Managed to get the washer #3 out with a small strong magnet
Thanks guys

[gspd]

Years ago I tried to put the rod back in with the trans out but could never find an easy way to secure the felt enough to get it back in.
Kurt in S.A.

A split section of plastic drinking straw with electrical tape around it will hold the felt snugly against the rod and allow it to slide in easily from either end.

[Rob Frankham]

I think it takes more than a few inches to extract the rod from the rear. If you pull the rod out too far from the rear, the only...or certainly easier...way of getting it back in is to reinsert from the front. Years ago I tried to put the rod back in with the trans out but could never find an easy way to secure the felt enough to get it back in. Much easier when I came around from the front.

Kurt in S.A.

The easy way to get the felt back in with the transmission out is to put the whole pushrod complete with felt in from the front of the box where the slight chamfer in the end of the input shaftmakes it relatively easy to feed it in. If you need to put it in from the rear of the box, it's much more difficult. My solution to that one was to get a piece of fairly thin sheet steel and wrap it around the rod to form a tight tube with a flare at one end. With the rod out of the box, put the oiled felt into place easing the tube over the felt with the flared end towards the rear. Push the rod in to the input shaft, easing the felt out of the tube and into the tunnel in the input shaft. Much the same principle as a piston ring compressor...

Rob

[Kurt in S.A.]

I never came up with good ideas before. All I had heard was to wrap the felt with dental floss, then pull it out once finished. I gave up.

Kurt in S.A.

[Airbear]

Managed to get the washer #3 out with a small strong magnet
Thanks guys

So how good is the bore in the cover? I've had a couple of covers that required the bore to be sleeved:

clutch bore2.jpg (134.96 KiB) Viewed 809 times

clutch bore.jpg (146.38 KiB) Viewed 809 times

clutch bore 3.jpg (45.72 KiB) Viewed 809 times

My local motorcycle-friendly engineering shop fixed them for OZ$50 each.