Early gearbox - machining to first motion shaft

PostPost by: dunclentdr » Tue Mar 21, 2017 11:26 am

I have an early semi-CR gearbox that has been refurbished but I gather the first motion shaft needs to be machined to mate with my later engine - can anyone advise and also maybe recommend someone who can do this?

I am based in the Midlands, UK.

Thanks

David
David Rose
1963 S1 - Bourne bodied
1963 S1 - Bourne bodied
1965 S2
1966 S3
1969 Europa - 210bbhp by Banks
dunclentdr
Third Gear
Third Gear
 
Posts: 313
Joined: 06 Mar 2014

PostPost by: rgh0 » Tue Mar 21, 2017 11:39 am

All you need to do is fit the matching crank pilot bearing to suit the input shaft you have as far as I am aware.

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 8814
Joined: 22 Sep 2003

PostPost by: Type28 » Tue Mar 21, 2017 1:30 pm

I think this is the type of bearing that needs replaced to suit the size of shaft?

http://qedmotorsport.co.uk/qed-shop/lot ... bolt-crank

A good tip I got, and it works, pack the old bearing with grease and tap an object the same diameter as the hole in to the grease ( I used a valve grinder - the rubber sucker fitted great) the hydraulic pressure pushes the bush out.

Cheers

George
Type28
Second Gear
Second Gear
 
Posts: 126
Joined: 26 Dec 2013

PostPost by: 2cams70 » Tue Mar 21, 2017 1:32 pm

I'm 90% sure that all semi-close input gears (2.97:1 first gear ratio) should already be sized to suit the 6 bolt crank with needle roller bearing (smaller diameter). They were introduced in 1967 at the same time as six bolt cranks were adopted on all pre-crossflow motors
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2046
Joined: 10 Jun 2015

Total Online:

Users browsing this forum: No registered users and 17 guests