Re: Liner Roughrider, gearbox problem
Posted: Tue Feb 08, 2011 10:11 pm
Hi all. I have now made some progress with this.
First task was to pour in about a pint of kerosene and run the engine in neutral for a few minutes.
I removed the drain plug, but only rusty coloured kerosene came out, no little bent plate. I could not see anything even with a torch, and fishing around did not locate anything. Oh! well, forget about it.
My gearstick and gearbox cover differ from those shown in the manual. (Maybe only the cover?) The two "PAD, gear lever", illus 64 are formed / machined in the cover casting.
The "bulbous part" of the gearstick is fixed in position by what appears to be silver solder. As mentioned previously, I measured 0.300" vertical movement in the gearstick when it was loosely assembled without spring etc,. The design is such that the gearstick could only have escaped the guide slots in the change mechanism by riding over the top of the selector fork when it was in (third) gear. Conclusion, raise the bulbous part so that the end of the gearstick seats 0.290" lower. A press, rather than heat, was used to break the solder seal, and positioned higher as mentioned above. In fact, rather than 0.010", there was possibly 0.040", but no chance of "escape" for the stick. This was then secured by drilling through and fitting a pair of roll pins, one inside the other. it was greased and assembled together with a new boot. I have left the spring and non-existent plate out from reassembly. Just in case there is a little plate anywhere, i have broken a piece of a rare earth magnet from a unit taken from and old computer hard drive, and with araldite, secured it in the brass drain plug. Maybe any "platelets" will gather there out of danger for next time I drain it off.
I started up, and now I have all gears again, and can continue with my work.
However, there is loads of slop in the lever, and so I will re-visit it with a plate and spring. I suspect that as well as stopping vertical play, the plate may well prevent side play by virtue of its shape.
What I need is an accurate description of the plate if anybody has easy access to a gearbox. A sketch and description must surely improve on the view shown in the spares list. i assume that no such new original part exists anywhere, so a good sketch will allow me to make one.
Les.
First task was to pour in about a pint of kerosene and run the engine in neutral for a few minutes.
I removed the drain plug, but only rusty coloured kerosene came out, no little bent plate. I could not see anything even with a torch, and fishing around did not locate anything. Oh! well, forget about it.
My gearstick and gearbox cover differ from those shown in the manual. (Maybe only the cover?) The two "PAD, gear lever", illus 64 are formed / machined in the cover casting.
The "bulbous part" of the gearstick is fixed in position by what appears to be silver solder. As mentioned previously, I measured 0.300" vertical movement in the gearstick when it was loosely assembled without spring etc,. The design is such that the gearstick could only have escaped the guide slots in the change mechanism by riding over the top of the selector fork when it was in (third) gear. Conclusion, raise the bulbous part so that the end of the gearstick seats 0.290" lower. A press, rather than heat, was used to break the solder seal, and positioned higher as mentioned above. In fact, rather than 0.010", there was possibly 0.040", but no chance of "escape" for the stick. This was then secured by drilling through and fitting a pair of roll pins, one inside the other. it was greased and assembled together with a new boot. I have left the spring and non-existent plate out from reassembly. Just in case there is a little plate anywhere, i have broken a piece of a rare earth magnet from a unit taken from and old computer hard drive, and with araldite, secured it in the brass drain plug. Maybe any "platelets" will gather there out of danger for next time I drain it off.
I started up, and now I have all gears again, and can continue with my work.
However, there is loads of slop in the lever, and so I will re-visit it with a plate and spring. I suspect that as well as stopping vertical play, the plate may well prevent side play by virtue of its shape.
What I need is an accurate description of the plate if anybody has easy access to a gearbox. A sketch and description must surely improve on the view shown in the spares list. i assume that no such new original part exists anywhere, so a good sketch will allow me to make one.
Les.