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Messages - mobile_bob

Pages: [1] 2 3 ... 176
1
General Discussion / Re: Microgen forum down??
« on: July 16, 2022, 11:55:00 PM »
it is working for me!

have you tried it again?

we did an upgrade a couple months ago, and some of the browsers won't work quite right with the new software
microsoft edge works fine for me, but firefox has issues.

iirc you have to include the "https"  with the (s) to get it to come up.

let me know if you continue to have issues

bob g

2
Listeroid Engines / Re: Valve stem oil usage?
« on: July 03, 2022, 06:30:06 PM »
what are you using for an air cleaner?  if paper, maybe clogged with fine powder causing a vacuum on the intake?

just asking...

bob g

3
Listeroid Engines / Re: My fix for Listeroid light flicker
« on: July 02, 2022, 03:53:44 PM »
most of the appliances, tv's and such have switch mode power supplies that can take in a wide variety of voltages. they then rectify, chop up and transform to some higher voltage, transform and rectify to whatever voltage(s) their design calls for,  so unless the incoming waveform is outside what they have designed to accept, they do a good job of making it work for their uses.

if i had an issue with flicker, i might consider strapping on an alternator, and a battery, and then feed a small inverter, large enough to cover my lighting and sensitive to flicker loads.

or i might use a step down transformer to bring the st head voltage down to something in the 12 or 24volt nominal range (rectified) and feed that into an inverter to output to my flicker sensitive loads.

another option would be to see if i could feed the st power into a ups such as an old apc unit, the output of which is steady clean pure sine wave that could certainly power any flicker sensitive loads.

all of these options have their level of complication, and their attendant loss of efficiency, but some are good enough to consider.  taking a 10% hit in efficiency on relative light loads, such as lighting might not really be much to be concerned with?  certainly less than taking the same 10% hit on heavier loads?

i mean i wouldn't think of trying to do such a system for motor loads, or resistive loads, that generally have no issues with flicker.

all this based on my wanting or having to use a single cylinder and st head,

if i were to design a unit based on the flicker issues, i might start with a clean sheet approach and maybe start out with a different approach to the problem all together.

bob g

4
Other Slow Speed Diesels / Re: Hatz E79 - Shop manual
« on: June 02, 2022, 11:28:18 PM »
are you using the hand crank?

if so, try to crank the engine without the compression release, you should have a hell of a time getting it to crank over
that would tell me you have adequate compression

also just because the injector appears to be putting out a decent spray pattern, it may not be doing so when pushing against compression, you might need to increase the injector spring tension a bit.

does the engine put out smoke while you are trying to start it?  if it is putting out smoke you are likely getting enough fuel, but it might not be atomized and increasing the injector spring pressure a bit will help.

the right way to check the injector of course is to take it to an injection shop and have them test and set the pressure that it pops off at.

i also agree that you might well do better to get a pulley mounted and spin the engine up using another engine, sometimes you just need the added rpm to get it to light up the first time.

very hard to diagnose this sort of thing from a keyboard/puter screen

fwiw
bob g

5
great video, instills confidence doesn't it?

imagine building an engine up off the floor, a concrete floor at that, that actually looks like it is swept with some
regularity.

"ok, let's go"

my favorite quote

bob g

6
Engines / Re: Oil Filtration video results
« on: April 26, 2022, 12:54:42 AM »
wow, and to think that is what i wipe my tushy with?

:)

(sorry i couldn't help myself)

seriously the filter looks to have caught a lot of crap
and it is why i don't like those nasty top feed holes on the listeroid con rods
they seem like a catchers mitt for a lot of crap to be caught and directed into the conrod
and eat the crank pin

bob g

7
Engines / Re: SR2 starter replacement
« on: April 22, 2022, 07:52:37 PM »
if you have to drill them out...

don't bring them to red hot, the relatively cooler surrounding metal will chill them and make them even harder than they started out to be.

if you can... sand off the paint or rust around the area where the set screw goes in, and then heat the area to a dark blue, make the area about an inch around if possible, all blue if possible and slowly let it cool by bringing the flame back a bit at a time over about a minute or so... then go get a cup of coffee or a beer (pick your poison)... wait until it is cool enough to handle.

then the little buggers will drill right out without much problem

also i cool my drill bits with water, i use a standard plastic pop bottle with an eighth inch hole drilled it in to dribble water and keep the bit cool.

never had one that couldn't be drilled out, if you anneal them properly first.

fwiw
bob g

8
Engines / Re: Wonít start when hot
« on: April 19, 2022, 11:24:21 PM »
i am not familiar with your specific engine, however

from what you are describing, and based on the fact it will restart when cold
i am thinking maybe a sticking governor spool, maybe gummed up.

when the engine rev's up when you drop the load on the engine by too fast tipping the dump
or clutch the governor weights fly out and the system reacts, drawing the spool back toward no fuel position, the governor normally would catch this and correct for overshoot to no fuel, but if the spool is carboned up on the shaft, or the flyweights are hanging up?  who know's, but my bet is the governor can't catch itself and correct.

i have seen it happen on other engine's with mechanical governors, not often but it does happen, as does a sticking injector rack, which might even be more likely, seen that happen many times over the years.  i would first check all the injector racks, and make sure they move freely from no fuel to full fuel without any sign of binding.

fwiw

probably someone(s) here that can be of more help

bob g

9
Original Lister Cs Engines / Re: CS cylinder repair
« on: April 06, 2022, 12:33:39 PM »
if you can get it resleeved for a hundred bucks then +1 from me!

a good sleeve will last a very long time, and i wouldn't worry about hard chroming the bore.

bob g

10
i don't know if i ever saw one with the "electric" motor option, if available i would love a couple of them... having said that i would take a couple of the 165 water cooled compressors without the "electric" option.

having a water cooled small compressor in my shop would be great, compress my air and heat water at the same time would be just great!  save on having a separate water heater having to do the job, and we all know that with the price of electricity/propane and trying to reduce my carbon foot print by being able to harvest heat off the compressor should help save the planet.

wanna be green and all ya know

bob g

11
i would be interested in a couple water cooled 165 aircompressors,
ones with 12volt drive motors mounted to the case would be really interesting.
always wanted a water cooled single cylinder aircompressor on the 165 size with a 12volt motor that drives the flywheel.

bob g

12
Listeroid Engines / Re: Top quality Listeroid exporter
« on: April 01, 2022, 12:09:56 AM »
i wonder what "iso" means to some of these guys?

i think the "s" has something to do with "sand" and maybe the "9001" is the amount of sand included in grams?

so lets see if we can figure this out

the "I" in "iso" has to stand for "Included"
the "S" in "iso" has to stand for "Sand"
the "O" in "iso" maybe stand for "Only"
and the "9001" is the amount of sand in grams?

yeah that must be the ticket!

 ::)

bob g

13
General Discussion / Re: concrete vs resilient mounting
« on: March 29, 2022, 01:45:48 PM »
wow
this should prove to be quite interesting!

go get 'em Bob!

:)

bob g

14
Engines / Re: Lister model L
« on: March 19, 2022, 02:38:20 PM »
fwiw

seems you also might have to be careful how far you screw the tube up into the rod cap?

it has to screw in far enough to engage the lower brg shell, but not so far as to make contact with the crankshaft? 

i seem to remember some discussion on that topic with the listeroids, years ago. not sure if it is applicable to the model L

bob g

15
Engines / Re: JP2 big end bolts
« on: March 13, 2022, 04:25:30 PM »
cobbadog

thanks for the info

goes to show and old dog can learn a new trick or three!

everything i was ever taught was to remove the lip/groove at the top of the cylinder, then hone, and then put in the rings with the taper down.  but then again, i was taught nearly 50 years ago, and mainly on mid and heavy diesel engines.

one higher compression engines, i wonder how they keep the ring flutter down?  one would think that the higher compressions and higher pressures from ignition would lift the rings?  but maybe that is not the case on lower compression engines?  maybe even on higher compression engines, if the rings are made stiffer or have added expanders?

interesting indeed,  i could see how a stepped ring would be advantageous if you had a ridge/lip/groove at the top of a cylinder,  having a step would keep the ring from contacting that and being damaged.

i suspect there is a compromise being made, in order to not have to remove the ridge/lip/groove and being able to just give the bore a quick scuffing to remove the glaze and put the engine back together again and get it back in service without having to tear down for rebore or resleeving the engine. i suspect the lifespan is shorter than going with a complete overhaul. 

but what do i know?
i have been wrong before, just ask my wife!  :)

bob g

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