Post by: txlabman on June 16, 2020, 09:31:21 pm
And a great idea on the slurry to lubricate it.
I am going to give that a try.
Post by: J.Jackson on June 07, 2020, 07:10:10 pm
I modified the application of the graphite to the power piston by simply dipping a small paintbrush in denatured alcohol , wet the piston with it, and then sprinkled the powdered graphite on to the wet piston.
I also notice a slight binding in the steel piston pin on the brass connecting rod. I lightly polished the piston pin with OOO steel wool, then gentle hollowed the connecting rod bearing hole very minutely with a small round file.
Post by: Nick on June 05, 2020, 10:17:55 pm
Post by: Jim on June 05, 2020, 06:13:08 pm
The graphite that I bought it super slippery and hard to get off your fingers. I have it in a jar and dip an ear bud into it and 'paint' the piston and piston rod with it.
Post by: Stoker on June 05, 2020, 06:09:52 pm
Post by: J.Jackson on June 05, 2020, 04:12:37 pm
How to you get the powdered graphite on to the pistons ?
Post by: Jim on June 04, 2020, 06:04:26 pm
I use powdered graphite to lube the moving parts of the engine.
https://youtu.be/xXI-mTigrZk
Post by: J.Jackson on June 04, 2020, 02:46:12 pm
This is the only solar/stirlling engine I have, but I can see a lot of little areas where a novice could simply make an assembly mistake. I thus wonder why PM doesn't have better YouTube videos for their products, especially with the massive influx of cheaper Chinese engines flooding the marketplace.
So, anyone have advice on how to tweak any longer run times from these PM Solars ?
[apologies if I am mis-stepping into the original intent of this thread]
Post by: Jim on June 03, 2020, 05:56:31 pm
As part of my "Peanut - Rider" routine maintenance, I remove the plug and insert a pipe cleaner soaked
in meths to clean the passage out. Oil from the displacer piston bushing can accumulate in the passageway and reach the piston and cause problems. I normally clean and lubricate my engine before
each run especially after it has been sitting awhile.
Good hint there Paul, thank you.
Post by: Stoker on June 03, 2020, 01:46:20 pm
Post by: Scorpion2nz on June 03, 2020, 01:24:33 pm
As it would result in different run direction ..
Cheers
Dennis
Post by: Stoker on June 03, 2020, 12:29:53 pm
I have a PM #13 that never would run. I got it a few years back from a relative. I wondered if it was assembled correctly, but oddly PM Research has no online (PDF etc) assembly or operating instruction . But they will send a hard copy of the instructions by mail for a few dollars.
Anyway, just to be sure, when looking from the perspective of displacer side (w/pin @ 12o’clock) .... the crank pin on the power piston (the graphite colored piston?) should be at 3 o’clock , not 9 o’clock.?
You are correct. Looking from the displacer side through the flywheel, the power piston crank pin should be at the 3:00 o'clock position and the power piston connecting rod should be fully extended with the piston skirt showing maximum exposure out of its cylinder, at the "bottom" of its stroke.
Perhaps I should add that the flywheel then rotates Counter-Clock-Wise (CCW) as seen from the displacer side, when set up in this fashion .... that is to say, the top of the flywheel moves toward the displacer, heat cap and flame. Also of note is that the flame should really be adjusted such that the very end of the heat cap does have flame engulfing it as well as the cylindrical sides of the heat cap, but the flames really shouldn't get too close to where the heat cap enters the body where the cooling fins are located. The power piston should never get any oil of any kind, but the displacer shaft can use a very little, far less than a whole drop, very light grade of oil occasionally, right where it enters the guide bushing. All other mechanical motions, bearings, wrist pins & etc, should be oiled lightly and regularly.
Post by: J.Jackson on June 03, 2020, 12:04:09 pm
Anyway, just to be sure, when looking from the perspective of displacer side (w/pin @ 12o’clock) .... the crank pin on the power piston (the graphite colored piston?) should be at 3 o’clock , not 9 o’clock.?
Post by: Belugawhaleman on June 03, 2020, 10:34:16 am
in meths to clean the passage out. Oil from the displacer piston bushing can accumulate in the passageway and reach the piston and cause problems. I normally clean and lubricate my engine before
each run especially after it has been sitting awhile.
Post by: Jim on June 03, 2020, 02:33:33 am
It´s just a plug to close the casting, after drilling the channel inbetween displacer and workpiston.
Thank you Jan for clearing up that mystery for me :)
Post by: classixs on June 03, 2020, 02:32:30 am
Post by: Jim on June 03, 2020, 01:01:20 am
Would you know what this screw with the nylon washer that all the PMR solar engines have is for?
[attachimg=1]
Post by: Stoker on June 03, 2020, 12:50:14 am
Hope that helps!
Post by: Jim on June 02, 2020, 11:58:51 pm
If you do, could you please be so kind to have a look a your engine and with the flywheel being the closest to you and the glass bulb the furthest away,
tell me if your left hand crank is 12 o'clock at what position is your right hand crank.
Thanks :)