Pu-5008/u Iron Horse generator unit, Johnson Engine

[Mike K]

Rings should be easy to find ..as Brian said .. oil seal will be easy as well.. go to any bearing / seal retailer with the dimensions ..measure the seal journal and outside diamter ..easy

Mike

I have some NOS valves .. and other bits . Drews here in Melbourne had a ton of NOS parts for them.. years ago . I got a NOS crankshaft and other stuff there.. should have got the whole lot....he would have sold it very cheap .

[gonefarwest]

Thanks, I updated my profile to include my location,

I did pretty well what you are suggesting me. The oil seal on this engine is not standard. The inside diameter hole is 7/8" and the outside is 1" and 1/16" which only leaves 3/32" space between the shaft and the outer cage for the seal. This seal is all rubber (or rubber like material) with no metal into it. It is like a square o-ring with an inside lip. It is hold in place with a metal snap ring.

As for the rings their profile is rectangular. These rings have 5 sides (4 sides that are 90 degrees to each other and the fift one that cuts one of the inside corner). The bottom of piston groove where the rings sit are not at 90 degrees. I went to the auto part with my rings and seal and they couldn't help me. I found that Hasting makes or used to make a set but I can't get them here. The Hasting number is 278.

I also checked the internet and I did not find a supplier.

I live in a small town of 3000 people and the next one is 125 miles away which make it harder.

[Bob Carriere]

Using either the manual or information from Brian A. you need to establish the exact size of rings you need........ or if you know for sure that Hastings #278 is the right fit... you now have specifications to start your shopping search.

Using the web you should be able to tap into the collector market in the USA for old tractors and farm equipment..... there is a big market for rebuilding old gasoline one cylinder engines...... these war time model usually had a civilian origin and certain suppliers sell all kind of weird ring sizes......

You can also cruise EBay..... and yes it will take you many evenings to get a hit but its a chance to take.

The worst place to go for anykind of parts we need is usually you local "Auto part store"....... you may do better at an old country farm tractor shop.

Same thing for a seal...... don't tell them what it is for.... just give them the inside and out side diameter....learn to measure with a micometer.... buy a cheap digital one form Princess Auto.......suppliers will search it up on a special search engine by size..... never by make or manufacturer model name..... for this you need to find a "bearing shop" like General Bearing Services" which has stores in larger Canadian towns. or have a coffee with some guys from the machine shop..... they may have good leads.....

It is really satisfying to walk in to a shop like "Bearing Solutions" in Ottawa and drop a large filthy CMP 6.5 inch front wheel grease seal on the counter .... have the guy look at it ......and apologize that he only has one in stock but can have a match by noon the next day...... he never knew what it came from.......

There are other CMP guys in BC.... Like Harry Moon..... that probably can help you find these special suppliers.......

You are only as far as your key board with the web.....

Good Luck

Bob C.

[Phil Waterman]

Hi All

Interesting how threads like this will come back to life a year or longer later. I am passing the following message along from a perspective new MLU member.

Hi Philip
Very sorry to hear about Mr. Winnington-Ball.
Thank-you so much for your response. My name is Dan Forgêt and I live in Watford, Ontario Canada. The gentleman I purchased the PU-5008/U generator couldn't get it running. I am currently in college taking Alternative Energy Engineering Technology and had recently completed a term of DC and AC motors/generators and was able to troubleshoot and repair it myself. Yahoo!! I seen on MLU that there was a gentleman (I think in Oshawa) that had copies of manuals for these very generators and was selling them for $12. I was hoping to get in contact with him about this and any other info (historic or otherwise) he may have. Thanks a lot for offering to post my requests. I really appreciate it.
Best Regards,

Dan