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Messages - scott p

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16
Engines / Re: Makeshift repairs and babbit
« on: June 22, 2021, 07:08:32 PM »
Yes a copper pipe would be ok with me if I can find one. The old bush is fairly thick, perhaps I could bore the old bushing out and push a copper liner in.

The wrist pin has any where from 1/2 to one thou wear, measures 7/8 in and is very hard.

I took the old bushing out and set the rod on a granite plate. The rod little bore does not seem to line up to the big bore. I need to check that out. If babbit does in fact swell as it cools I could try filling the small end and then somehow drilling and reaming to align with the big end.

 The small end bore is roughly tapered by about three to four thou . By design or just loose tolerances?
I jumped the gun on the bushing I made and did not discover the taper until too late.

The old bush is not tapered and appears to be soft steel with bronze or some fairly hard liner. Possibly I could bore it a little and  pour babbit or tin solder  and ream it.

Oh well, I will be thinking about it.




17
Engines / Re: Makeshift repairs and babbit
« on: June 20, 2021, 08:15:51 PM »
So 38ac glad to hear some one has been there done that. What would be your procedure for making a bushing to fit the small end of the con rod ?

Ingenuity and perseverance, just what MachineNlectricMan was talking about, well done.

All done without fancy tooling.

Did you need to use Prussian Blue or something to located high spots.

Nice touch, valve grinding paste.

18
Engines / Re: Makeshift repairs and babbit
« on: June 19, 2021, 09:29:13 PM »
Interesting observation 38ac. I hadn't considered that sort of thing. I think I will try brass rather than the babbit I have here.

I believe I read a post where you might have a lathe. Have you ever made bearings or bushings? 

I am including a couple pictures showing what I will try first in my attempt to make a proper bushing. One shows a shaft slightly smaller that the wrist pin. The second pict is the outer container to hold the brass. If I can get the brass out or off of the these two items I will consider myself lucky.

19
Engines / Re: Makeshift repairs and babbit
« on: June 18, 2021, 09:53:24 PM »
Out of curiosity I did a search. Looks like babbit comes in a lot of different flavors,and is readily available.

20
Engines / Re: Makeshift repairs and babbit
« on: June 18, 2021, 06:35:44 PM »
I use old poured babbit bearings on some of the sawmill shafts. I get the babbit from a comersial saw mill. They use the babbit in their gang saw. They call it high speed babbit or hard babbit.They also say it is lead free with a lot of tin.

I coat the shaft with a  coat of carbon applied by a Acetylene flame. As mentioned clay or something to seal the gaps. Poured directly through the oil hole and then drilled. No need to scrap. Works fine, no searching around for probably none existent bearing shells.

I am currently working on  replacing the small end bushing on a small, old, slow speed gas engine. I am not aware of any organization that sells bushings for these old engines. This hard babbit is a dream to mill. It will be a DIY schooling project. I might coat the wrist pin and pour the babbit around it and then machine it to fit the small end.


21
Engines / Re: Dismantling Lister D Governor mechanism
« on: May 15, 2021, 03:23:28 AM »
I have no experience with that type of engine but I would be suspicious of those governor springs. Being mismatched like that doesn't seem right. Look at your exploded diagrams

22
Interesting post by cujet.

 As far as maintenance and troubleshooting goes seems like a good long term investment to consider a heat pump.

Of course it all depends on the over all circumstances of each area to heat and how much time one is willing to spend building and then working the bugs out of what could become rather complicated.

Heat pump, more or less instant heat and thermostatically controlled to boot.

2000 watts 220 volts around 10 amp. What does a heat pump of that nature cost?

23
Engines / Re: Museum Lister D problems
« on: May 06, 2021, 06:19:18 PM »

For sure cobbadog. New honing only in a case where compression is suspect, with inconsistent ability to run.  I would think consistent compression below 90 would be a red flag if it's going to be a worker.


24
Engines / Re: Museum Lister D problems
« on: May 05, 2021, 08:54:08 PM »
My two cents, considering magnetos, point gap is critical, also points should be not just  free of pits and roughness but polished  and the final bit is to run clean dry paper or cardboard through the points to make sure all residue is wiped off.

Try running or turning the engine over in the dark to see if any sparks show up in the electrics.

If the compression is weak a trick I learned is to give the cylinder bore a good hone somewhat rough.  This will make the rings reconnect to the cylinder bore. Make sure you clean the bore after honing.


25
Generators / Re: Capacitor calculation for DIY stand alone genset
« on: May 05, 2021, 05:29:32 PM »
Hats off to CS6-owner for a well said post. Pretty much laid it out. Looks like a single phase motor would, for simplicity’s sake, be a better way to go.

What about a three phase generator, can you run a load off one coil with say a star winding?

26
Generators / Re: Capacitor calculation for DIY stand alone genset
« on: May 02, 2021, 05:55:26 PM »
If I am reading that motor tag right the voltage is 400 or 690 volts and what phase ???

27
Generators / Re: SR3 with a winpower 15 kva gen head
« on: March 14, 2021, 02:23:15 AM »
Kinda looks that way.

Why couldn't the solenoid be controlled by a simple on off switch until something better is found ?

I would think a good way to start would be to disconnect the solenoid and test it but also take that opportunity to work on the frozen linkage. Loosen nuts and bolts if needed and  using some rust buster or oil and tap the linkage here and there or what ever your common sense tells you. The linkage looks pretty sturdy, worst case would be some heat carefully applied  heat it up but let it cool before prying..

Might want to disconnect the other end of the linkage also.

28
Generators / Re: Lancashire dynamo and crypto generator help
« on: March 08, 2021, 06:34:33 PM »
If I am interpreting your post correctly measuring each phase to neutral should have given you a voltage. If true what was the voltage?

Again, if I am interpreting your post correctly measuring across each phase, as I see it, does not give your meter a point of reference therefore no  reading.

You mention checking the mains is that the same thing as measuring a phase to neutral? What is the difference between a phase and a main ?

What did you use for neutral ?

I sent the picture of the mains to him, here is what he had to say about the white wires.

“White wires normally go to the control console of a generating set, if you don't have the console you'll have to start again as it's not possible for me to guess what they are. Normally they will be connected to various volt meters and to do with safety engine shutdown in case of over volt or over
speed.”

I was hoping he would have something to say about the lettering under each main. I can see a b c d, LD1 (load 1) under A, LD2 under B but I can’t see if there is anything under c and d. I would expect to see LD3.

Is it a b c D or a b c N?

Any way the mystery of the white is wires solved; you can play around with them and build a new console. The rest of the wiring looks to be in place and can do the mysterious things they do.

Optimistically, it looks like you might not really have a problem other than deciding whether to use three phase or single phase.



29
Generators / Re: Lancashire dynamo and crypto generator help
« on: March 08, 2021, 01:24:27 AM »
Ok, we can do that, can you be more specific as to how and where you measured the voltage out put but was unable to get consistent readings??

No offense intended of course, the reason I asked about DC  if the meter is not set for the correct voltage the display will be scrambled. My meter says it automatically switches to the correct AC or DC but it doesn't. Just want to clear that up.

Probably pictures of any wiring or what ever seems useful.

30
Generators / Re: Lancashire dynamo and crypto generator help
« on: March 07, 2021, 09:08:08 PM »
Hello Andy: Sorry about the delay.

If your still around, I sent the picture of the six coils to a fellow I know.

If you didn't know already this is his reply

"That is a transformer automatic voltage regulator Scott, on those types the voltage can be adjusted and if you need to I'll tell you how. If the unit works it would be useful to keep as these type AVR's are good for handling inductive loads. I've probably got a wiring diagram for this type somewhere."

If you want I can send him more information and see what he has to offer.

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