HARRISON 11"
New Member
- Messages
- 4
- Location
- Monmouth, UK
I have recently bought a 1967 Harrison 11". Overall it is in very good condition.
As I am new to posting on this forum, perhaps this is not the best way to request information on how to (1) separate the apron from the saddle and (2) how to remove the gap piece from the bed if necessary for (1) so that I can replace the rack pinion shaft bushes.
The bushes in the apron for the rack pinion are worn, identified as L5-4-3, L5-4-4 (two off) and L5-4-5.
Simplistically, the Parts List does no indicate any fastenings! It is not clear what has to be dismantled to remove the apron from the bed to get at the bushes.
I initially believed that it was simply a matter of removing the four Allen screws fixing the saddle to the apron, the carriage locking bolt, the three Allen screws holding the rear strip, and the one holding the front strip (LH). Having done this, it is obvious that there is still something holding saddle and apron together - it's not the two dowells as there is a little movement. With the apron packed up, surely the saddle should now lift off?
Online people have taken apart L5s and 13" , one making mention of the need to remove the gap piece to get enough room to reach some further bolts securing the carriage to the apron. This gap piece also refuses to come off, despite removing the long axial bolt and the front and rear vertical bolts. Paint alone is not holding it, as it also springs slightly.
It occurs to me that if the saddle was wound right back to the headstock and the tailstock completely removed, the tailstock end "bracket" could be unbolted and sprung off its dowels, then the saddle/apron/leadscrew/feedshaft could be wound completely off the bed to the right (assuming that the feed rod and leadscrew will self-disconnect from the Norton gearbox) - no doubt needing two or three people to manipulate it all. Then everything would be accessible.
I suspect that the listed bushes are plain - if of a standard size it might be feasible to fit Oilite bushes instead. I have yet to locate any genuine Harrison bushes.
Any advice will be gratefully received.
As I am new to posting on this forum, perhaps this is not the best way to request information on how to (1) separate the apron from the saddle and (2) how to remove the gap piece from the bed if necessary for (1) so that I can replace the rack pinion shaft bushes.
The bushes in the apron for the rack pinion are worn, identified as L5-4-3, L5-4-4 (two off) and L5-4-5.
Simplistically, the Parts List does no indicate any fastenings! It is not clear what has to be dismantled to remove the apron from the bed to get at the bushes.
I initially believed that it was simply a matter of removing the four Allen screws fixing the saddle to the apron, the carriage locking bolt, the three Allen screws holding the rear strip, and the one holding the front strip (LH). Having done this, it is obvious that there is still something holding saddle and apron together - it's not the two dowells as there is a little movement. With the apron packed up, surely the saddle should now lift off?
Online people have taken apart L5s and 13" , one making mention of the need to remove the gap piece to get enough room to reach some further bolts securing the carriage to the apron. This gap piece also refuses to come off, despite removing the long axial bolt and the front and rear vertical bolts. Paint alone is not holding it, as it also springs slightly.
It occurs to me that if the saddle was wound right back to the headstock and the tailstock completely removed, the tailstock end "bracket" could be unbolted and sprung off its dowels, then the saddle/apron/leadscrew/feedshaft could be wound completely off the bed to the right (assuming that the feed rod and leadscrew will self-disconnect from the Norton gearbox) - no doubt needing two or three people to manipulate it all. Then everything would be accessible.
I suspect that the listed bushes are plain - if of a standard size it might be feasible to fit Oilite bushes instead. I have yet to locate any genuine Harrison bushes.
Any advice will be gratefully received.