Featured Rickman Triumph Project

I'm putting my cases together and an having a bit of difficulty in remembering where the various studs go in each case before assembling. It may be I am missing a stud or something like that. This is a 1967 T120R. Is this the correct placement, 2 studs in the primary side case on the aft end, and two studs in the timing side case on the outside for the transmission case. I thought there might have been another stud somewhere and can't quite tell from the parts manual what goes where. Thanks for any help!

 

Watch Todd from about 25 and a half minutes in

 

Thanks. On another forum a member helped me figure this out. It seems the PO of this engine used a stud in place of the #43 bolt (on the parts manual), which is what confused me. So when taking the engine apart I did not have the #43 bolt, but instead 2 of the #4 studs. Now I am wondering if I can go ahead and put it together with the two #4 studs, as it doesn't seem to have any clearance problems. Thanks for your comments!

 

Pressure relief valve - So I was cleaning some of the parts from this engine and took the pressure relief valve apart and found that it was missing the piston, everything else was there but no piston. So I am wondering if anyone knows what would be the consequence of running an engine with the pressure relief valve missing the piston? Thanks if you have an idea!

 

The piston creates oil pressure to the crank and as the engine builds its revs the spring compresses and the piston then allows pressure to bleed off, no piston = next to no pressure in crank.

 

I've had a couple of PRVs with pistons stuck open. Low oil pressure and a sump full of oil. Fun fun fun....

 

So, whoever rebuilt this missed a very important detail! Thanks for the input!

 

i had one once where the DPO installed the oil pump without the slider block.

that did not work and destroyed the oil pump pistons

 

I guess it is then up to whoever the present owner is - to make sure all is ok. Meaning that whatever we buy, we own, and there is no way to know except for taking it all apart. I suppose this is the first rule of working on vintage bikes.

 

Rickman gearing. So I am trying to figure out what size front and rear sprockets to use on my Rickman build. This is a standard Triumph T120 engine, rebuilt. What I've got for front sprockets are an 18 and a 19 tooth. For the rear I've got a 49 and 60 tooth. I'mm planning on using this mainly for trails and fire roads and a bit on the street. I'd appreciate any advice on how to set up this gearing. I'm ok with getting different sprockets - I just have these now. Thanks.

 

You might like this. https://www.gearingcommander.com/

 

This is a cool site - thanks!

 

Friend had an early pre-unit engine being built with later internals .. one piece crank, 9 stud top end, etc. To take the larger main bearing on the timing side the cases were built up with weld and remachined. All standard stuff, but he had " a funny feeling " and wanted it stripped and checked. All good .. except the swarf was still inside the cases ??? Even though it possibly wouldn't have hurt anything ........ how could that even happen ???? Maybe we should have a forum called " Cock-ups I have made " or similar ?

 

he destroyed that one himself before i got it. he had also installed the crank pinion with the woodruff key out of its slot, jammed sideways between the crank cheek and the gear. one piston had seized.

it was a mess, but i bought it as a core to rebuild and replaced everything except the cases, camwheels, and gearbox internals.

the ones i am leery of are those where the seller claims, "just rebuilt!"

or "fresh motor!"

you never know.

 

" Yer pays yer money and takes yer chances " goes the saying.

 

I'm putting my Primary together now and I noticed on the cover plate (for the final drive) that on the inside of the plate is a tit. Anyone know what this is for and if it has to be oriented in a particular way?

Also, what do folks use to seal this cover plate, I've heard some folks use silicone versus something like yamabond?

Thanks.

 

that tit is the source for all kinds of speculation and triumph lore from the hoary shamans of old.

nobody knows what it was for, except maybe it was to make banging the damn thing off easier from the other side.

add your own hypothesis.

 

An alien growth ? Leave it off and get great cooling for the clutch ... and quicker to get in to change the gearbox sprocket .... or screw it to the wall and hang your keys on it. Seen a fair few of these, but never one with a nipple as far as can remember ??

 

I wondered if it was part of a casting sprue, but seems like that would have been ground off.

 

i think its always there. if you put it near the bottom you can pry against it, but n my experience you can pry against the flat part too.