Author Topic: Pulling a gear change shaft seal out  (Read 239 times)

Offline jeremypeachey

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Pulling a gear change shaft seal out
« on: February 10, 2020, 11:52:50 AM »
Hi has anyone reading this actually pulled the gear shift shaft oil seal out using screws and a puller?  - and drifted a new one in?
Jeremy P

Offline Trigger

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Re: Pulling a gear change shaft seal out
« Reply #1 on: February 10, 2020, 02:28:53 PM »
Hi has anyone reading this actually pulled the gear shift shaft oil seal out using screws and a puller?  - and drifted a new one in?

Yep, done a few hundred. You need good self tapping crews, 2 of and pull on them with a couple of pairs of pliers  ;)

Offline jeremypeachey

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Re: Pulling a gear change shaft seal out
« Reply #2 on: February 10, 2020, 02:46:53 PM »
Great thanks Trigger.
It's quite recessed but do-able.
How about the push rod and drive shaft ones -  tougher or would you only do by splitting cases?
The culprit seems more the gear shift one as it's lower and has a visible gap around the shaft. I think I may do that first and see what improvement there is.
Jeremy P

Offline Trigger

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Re: Pulling a gear change shaft seal out
« Reply #3 on: February 10, 2020, 03:39:12 PM »
Great thanks Trigger.
It's quite recessed but do-able.
How about the push rod and drive shaft ones -  tougher or would you only do by splitting cases?
The culprit seems more the gear shift one as it's lower and has a visible gap around the shaft. I think I may do that first and see what improvement there is.

The push rod seal is even easier. Have you cleaned the whole area and when it is dry, buff talcum powder and you will see were the oil leak is coming from. Another culprit is the 0' ring on the starter motor   ;)

Offline jeremypeachey

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Re: Pulling a gear change shaft seal out
« Reply #4 on: February 10, 2020, 04:35:58 PM »
Many thanks, good idea, I was going to give it a thorough clean, including with the drive sprocket off, and run it for a while, and will add the talc. Have you done the drive shaft one without splitting the case?
The chain is oversized and has rubbed on the clutch push rod one, so I'd like to replace that too. It seems a loose fit round the rod.
Jeremy P

Offline Bryanj

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Re: Pulling a gear change shaft seal out
« Reply #5 on: February 10, 2020, 05:02:08 PM »
Is the pushrod in one piece?

Offline jeremypeachey

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Re: Pulling a gear change shaft seal out
« Reply #6 on: February 11, 2020, 08:02:04 AM »
Thanks Bryan. 2 part with approx 3 in first piece
Jeremy P

Offline Bryanj

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Re: Pulling a gear change shaft seal out
« Reply #7 on: February 11, 2020, 09:10:31 AM »
That means its broken as there was never a 2 piece one. You need to replace it to help stop oil leak

Offline Nurse Julie

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Re: Pulling a gear change shaft seal out
« Reply #8 on: February 11, 2020, 09:18:03 AM »
Well, you definitely need a new push rod, as Bryan says, yours is broken. I sell the new push rods, send me a PM if you want one.
Im a Nurse, trust me, this won't hurt.....much !!!

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http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline jeremypeachey

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Re: Pulling a gear change shaft seal out
« Reply #9 on: February 11, 2020, 09:45:32 AM »
Many thanks both. Strange, it looked ‘finished’ on the mating surface. I think it’s an Italian import - still one piece? I’m away for a couple of days so will look later in the week. Best J
Jeremy P

Offline Trigger

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Re: Pulling a gear change shaft seal out
« Reply #10 on: February 11, 2020, 12:19:47 PM »
Many thanks both. Strange, it looked ‘finished’ on the mating surface. I think it’s an Italian import - still one piece? I’m away for a couple of days so will look later in the week. Best J

There is no mating surface, only the broken rod that has been spinning and grinding to making a nice smooth surface  ;)

Offline Oddjob

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Re: Pulling a gear change shaft seal out
« Reply #11 on: February 11, 2020, 01:00:20 PM »
Also check the ball bearing is still in the clutch lifter mechanism on the sprocket case, check it's still round as it can distort.
Don't play stupid with me, I'm better at it

Offline jeremypeachey

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Re: Pulling a gear change shaft seal out
« Reply #12 on: February 11, 2020, 02:13:33 PM »
Many many thanks all. Yes the ball looks ok. 👍👍
Jeremy P

 

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