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Author Topic: Ashwamegh 25/2 :the saga continues  (Read 1091 times)

Willw

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Re: Ashwamegh 25/2 :the saga continues
« Reply #15 on: August 10, 2018, 09:47:44 PM »
Re: your auto-fill oil tank; it appears that the feed line from the tank enters the engine through what was originally the dipstick hole.

On my 6/1 clone the correct oil level in the top sump is several inches below this hole, how does the oil tank know when the oil level is correct?

To me your oil tank could be too high, depending on the answer to the above question.

Could your engine be overfull with oil?

ajaffa1

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Re: Ashwamegh 25/2 :the saga continues
« Reply #16 on: August 10, 2018, 11:12:48 PM »
Brand new one for sale here with some good pics: https://www.gumtree.com.au/s-ad/violet-town/miscellaneous-goods/diesel-generator/1191994009

1000 rpm, hope the balance and flywheel castings are OK

Bob

EdDee

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Re: Ashwamegh 25/2 :the saga continues
« Reply #17 on: August 11, 2018, 10:41:21 PM »
Hi Willw,

The oil line enters the top weir dipstick hole and stops just at the upper oil level, by adjusting the stop collar on the pipe I can set the depth that the pipe reaches to. The oil tank is sealed and only allows oil out when air can enter the pipe from below, ie as the oil level falls... As a bubble of air enters the tank, it lets a few drops of oil out, the oil level rises, and no more air enters the pipe, oil stops flowing out the tank....

The height of the tank itself has no bearing on the oil level in the sump whatsoever... But the depth that the pipe reaches into the sump does!

Cheers
Ed
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Willw

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Re: Ashwamegh 25/2 :the saga continues
« Reply #18 on: August 12, 2018, 05:50:34 AM »
Hi EdDee, thank you for the explanation of the oil tank. Ingenious system. :D

LowGear

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Re: Ashwamegh 25/2 :the saga continues
« Reply #19 on: August 12, 2018, 11:11:32 PM »
I first saw this at Aunt Gladys's in about 1950.  We'd fill the jug with water and flip it upside down in a pan for the chickens.  Once the vacuum got established the water slowed to a "as used/needed" flow.  I just built something very much like it for plants I leave for weeks at a time inside the house  My neighbor stops by every couple of weeks and fills the used gallon juice jug.  The oil sump is a great application.  Bravo.
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Matt12

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Re: Ashwamegh 25/2 :the saga continues
« Reply #20 on: October 26, 2018, 09:07:52 PM »
I just can't get this thing to produce power.

I sent the cam to Butch who installed the new weights and see no change.

The engine will pull about 1600 watts but if I load it with another 1000 watts it just won't
do the deed.

With  no load I set the speed to 720 engine rpms. That will give me 1800 at the gen head.
I see 120 volts at 63 HZ. With a 1600 load it does 117 volts @60 HZ.
But another 1000 watts and the voltage will fall to 93 volts @ 54 HZ.

The engine is not "working" at this speed the governor just won't "pick up".

I tried several springs and spring combinations.

I am thinking a larger gen pulley to bring the engine rpms up to about 800 or so.

The engine has always run very close EGT's but I see a slight difference now. I guess this is do
to the new cam lobe on the #1 cylinder. I haven't reset the timing on that side yet but I don't believe
it is enough to cause the problem I am having.

I am open to ideas.

Gary

 Hi Garry,

                It sounds like a too short or weak governor spring,  as you know, the spring pulls the rack open until the revs come up and the gov weights throw outward and pull the rack back to the set speed, it has to be the spring.
Matt

32 coupe

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Re: Ashwamegh 25/2 :the saga continues
« Reply #21 on: November 17, 2018, 07:15:06 PM »
Update......after thinking about this for a while I dug throught my
junk and came up with a new 2B pulley and center.

The shaft size was larger so I turned a sleeve for it.

The new pulley is about 1" larger in diameter so if my numbers
are correct it should bring the engine up around 830 rpm or so
from the current 720 or there about.

If I gather the strength tomorrow I'll fire it up and see if it will bring the govenor in line where it will pull a load.

Enjoy !




 
Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

broncodriver99

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Re: Ashwamegh 25/2 :the saga continues
« Reply #22 on: November 17, 2018, 10:09:59 PM »
Looks like you need to find a better key. You are going to be depending on the taper lock for most of the strength with that setup.

IIRC you are in the US. Check out https://www.huyett.com/  They carry offset and oddball key stock.
« Last Edit: November 17, 2018, 10:12:56 PM by broncodriver99 »

32 coupe

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Re: Ashwamegh 25/2 :the saga continues
« Reply #23 on: November 17, 2018, 10:27:11 PM »


Thanks for the tip, I somehow totaly missed that !


Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

32 coupe

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Re: Ashwamegh 25/2 :the saga continues
« Reply #24 on: November 18, 2018, 08:29:06 PM »

Today's saga.....

Had some key stock handy so a small task completed.

This engine starts and runs so nice. The temps are so close while running under load.

So here is what we got:

Engine no load is 856 rpms turning the gen at 1850. So my numbers were pretty close.

Engine loaded at 36 amps is 820 rpms engine and 1750 .

Hz is 61.4 no load with 58.3 hz with a 4.3 KW load.


It is better but no where I think it should be. I'm thinking it should pull 7 to 10 kw .....thoughts ??


I will add that startup was one of the easiest so far. I installed the pulley adjusted the slide for the gen
and set belt tension and on start and running I didn't have to touch it ! The usual method is starting and
stepping numerous time to get the belts to track correctly.

I installed.the factory spring and on startup I had to turn the thumb screw a couple of turns to dial it in.

Easiest startup yet  First spin, no problems......

I will begin the process of different springs again and see if I can get the thing to pull a load. It is better but
still no where near to my expectations.....

Enjoy !



Metro 6/1 turning a ST 7.5 KW gen head
Changfa 1115 turning a ST 15 KW gen head
Ashwamegh 2/25
John Deere 110 TBL
New Holland TC 30

"I was sitting here reading this thinking what an idiot you are until I realized it was one of my earlier posts !"

mikenash

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Re: Ashwamegh 25/2 :the saga continues
« Reply #25 on: November 19, 2018, 12:51:49 AM »
I know you have been through all that, but I can't help thinking it sounds like a governor issue:

Load comes on.  RPMs drop.  Governor weights move.  linkage opens fuel rack.  RPS increase.  Governor weights move back a bit . . .

I'm not thinking of it from a Lister person's POV cos I don't know enough about them - but from an idiot engineer's point of view, I'm asking myself about the relationship between RPMs dropping in response to load and governor weights responding . . . I'm assuming you have played with that process?  Maybe allowing the RPMs to drop quite a bit to see at what point the governor responds and how?

Excuse me covering ground that has already been traversed

Good luck.  Mike

ajaffa1

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Re: Ashwamegh 25/2 :the saga continues
« Reply #26 on: November 23, 2018, 11:04:12 AM »
Hi 32 Coupe, I`ve been watching this thread for a while without commenting because I too believed it was an issue with the governor, governor spring and etc. There are a lot of people on the forum with much more experience of governor problems than me and I thought they would sort you out.

There are a couple of other issues that will cause an engine to under perform, even with a perfect governing setup. The first is exhaust back pressure and the second is inlet flow. How big are the inlet and exhaust valves, are they proportionately bigger than those on a 6/1 or 12 /2? If not it is never going to produce the power you are expecting. Ditto for the inlet and exhaust ports. How large are the air filters and exhaust pipes? I recommend you try running it without an exhaust or inlet manifold, if this produces a significant improvement in output you have your answer and need to make changes to the valves and ports or change the cylinder heads.

Wouldn`t surprise me at all to find you have a minimally modified 6/1 head on a significantly larger cylindered engine.

Bob

glort

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Re: Ashwamegh 25/2 :the saga continues
« Reply #27 on: November 23, 2018, 11:34:57 AM »

Along the lines of what Bob is alluding to, have you tried over riding the Govenor and checking the engine is actually developing the power to pull the laods it should?

The simple test would be run the thing up with the full load then grab the throttle lever and force the rack wide open. If the thing will speed up and pull harder, it's the governor. If the thing won't go any faster and wont carry the rated load,  it's the engine not developing the power it should.

Exhaust and Inlet are good places to start and I would also look at the fuel side of things if you determine it's not the governor but the engine power itself.  On my veg vehicles, when the filters get partially blocked, the power can fall off. They won't hunt or stumble ( till later when there is less fuel flow) but they won't make full power either.  Do not assume just because the filters might be new they flow as they should. Don't know what you have or if you are already using an automotive type filter but if it's OEM, Could be something  with the flow rate for a 6 or a 12 being put on a 25 that don't cut it.

 You could get some clean fuel in a clean container and feed it direct into the IP and see how that goes. If there is an improvement in output, there you go.  Automotive type filter and a bit of tank elevation and you should be fine.

I think you need to determine though if it's the goveror not giving the engine it's full potential or the engine isn't making the power it should in the first place.

38ac

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Re: Ashwamegh 25/2 :the saga continues
« Reply #28 on: November 23, 2018, 12:50:34 PM »
I did the calculations on your engine RPM vs hertz numbers and it appears that you have fixed your belt slipping issues.
Now before you tear into anything you need to do as has been advised here. Load it just as youdid previously then push the on the racks while watching hertz or RPM., If it is strictly a governor problem,it should briskly come back to speed. If it does not pickup you have HP issues not governor issues.  If it comes back but is sluggish about it you have HP issues. The engine must run right for the governor to work as designed and the governor must work right to produce the advertised HP. It is two separate issues but they are intertwined.
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BruceM

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Re: Ashwamegh 25/2 :the saga continues
« Reply #29 on: November 23, 2018, 04:30:04 PM »
+1 for 38ac's assessment, though I thought it was already done and confirmed to be governor.