Next overhaul project....

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Scrat
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Re: Next overhaul project....

Post by Scrat » Sun Dec 24, 2023 10:43 am

We have a working water pump.

Of course, both balls were stuck in their seats.
Still waiting for good weather to have a test run.

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Old Man Aaron
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Re: Next overhaul project....

Post by Old Man Aaron » Sun Dec 24, 2023 11:28 am

Always good to get another job ticked off. Hope it clears up soon. :thumbleft:
Regards,
Aaron - Scum Class Works

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Re: Next overhaul project....

Post by Scrat » Mon Dec 25, 2023 1:32 pm

Today there was a gap in the rain but....also a leaky fitting which kept me from firing up.
After fixing that I will try again.

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Re: Next overhaul project....

Post by Scrat » Tue Dec 26, 2023 1:16 pm

Got a few metres under her own steam today, but the backhead looks like a miniature version of the Niaragra Falls.

So back to the workshop.

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philipy
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Re: Next overhaul project....

Post by philipy » Tue Dec 26, 2023 6:23 pm

Slow and steady wins the race.. or something!
Philip

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Scrat
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Re: Next overhaul project....

Post by Scrat » Tue Jan 02, 2024 12:17 pm

Happe new year!

December 31th she did the first lap under her own steam. This is a big step after getting just a few metres on December 26th.
Niagara falls have been removed from the backhead, other minor jobs have been completed.
(And new jobs identified of course)
Next on the list:
- engine pump is not reliable, sometimes it delivers water to the boiler, sometimes not.
- a proper blowdown valve is needed
- the blower is too weak, even at 50psi it cannot hold the fire alive.

And here´s what you might have been waiting for:

The twins:

Image

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philipy
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Re: Next overhaul project....

Post by philipy » Tue Jan 02, 2024 12:22 pm

Superb! Well done.
Philip

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Re: Next overhaul project....

Post by ge_rik » Tue Jan 02, 2024 2:59 pm

Excellent. I'm now tempted to construct an over-type loco. One was used on the Aveling & Porter sidings on the Aldeburgh branch at Leiston so it would be nostalgic for me to see if I can find a three foot gauge version for the PLR
rlwyleiston5.jpg
rlwyleiston5.jpg (26.29 KiB) Viewed 1186 times
Rik
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Peckforton Light Railway - Blog Facebook Youtube

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Scrat
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Re: Next overhaul project....

Post by Scrat » Tue Jan 02, 2024 3:13 pm

Hi Rik,

these tram locos can become addictive....
We might hold a photo cometition on that topic as well.

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Old Man Aaron
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Re: Next overhaul project....

Post by Old Man Aaron » Thu Jan 04, 2024 6:57 am

:bravo :salute:
Regards,
Aaron - Scum Class Works

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Dr. Bond of the DVLR
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Re: Next overhaul project....

Post by Dr. Bond of the DVLR » Wed Jan 17, 2024 5:20 pm

Wow! Brilliant to see you bringing it into service. I really love an overtype. For many years I was invovled at the Garratt Works Museum steaming Sirapite up and down a tiny bit of track - happy days.

Looking forward to the next up dates.
Image
The railway which people forgot
(to build)

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Scrat
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Re: Next overhaul project....

Post by Scrat » Thu Jan 18, 2024 8:08 am

Compared to 807, Sirapite is quite huge.
I spent the last workshop sessions building the brake gear.
Image
Took a few tries to get the lever dimensions right.
The handwheel is a Wilesco spare part.

As soon as the weather gets better I will have another test run.
Hopefully I will be on board the train this time.
Draughting has been worked on. Blower power has been improved.
Last time the blower was too weak to hold the fire, even while the engine was not running.
The water pump is reliable now so I be able to get a few laps with driver.

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Re: Next overhaul project....

Post by philipy » Thu Jan 18, 2024 8:28 am

She looks superb, Holger.
Can't wait to see a video of her running.
Philip

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Scrat
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Re: Next overhaul project....

Post by Scrat » Thu Jan 18, 2024 9:26 am

philipy wrote: Thu Jan 18, 2024 8:28 am She looks superb, Holger.
Can't wait to see a video of her running.
Here you go:
https://youtu.be/qnYce0YG07A

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Scrat
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Re: Next overhaul project....

Post by Scrat » Tue Feb 06, 2024 12:30 pm

Another test run last weekend showed that the water pump is reliable now.
That´s the good news.

There still is an issue with draughting. Even at standstill using the engine blower or the electric blower I cannot get the pressure above 25 psi.
As boiler and smokebox are one piece there is no leak there. The smokebox door also seals nicely.
The firedoor also seals well.
The suspect in this case is the grate. Bars are 3mm diameter with just 1.5mm gap between them.
I will make a new grate for the next test.

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Re: Next overhaul project....

Post by Old Man Aaron » Wed Feb 07, 2024 10:02 am

Sounds frustrating. I hope it's just the grate that sorts it, that is a ridiculous bar gap - even 16mm locos have wider spacing.. :scratch:
Regards,
Aaron - Scum Class Works

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Scrat
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Re: Next overhaul project....

Post by Scrat » Wed Feb 07, 2024 1:17 pm

Hi Aaron,

the spacing is always a bit trial and error.
I use Anthracite coal.
My LBSC Titfield Thunderbolt and my Maxitrak Swallow have had issues with clinker.
A wider spacing of the grate bars solved this problem.
I will just make another grate for 807 and try again.

it´s always a long way to get all components in this line to match.
Firehole door (top air), grate, flues, smokebox tightness, blastpipe, blower assembly.
In this case I am quite sure that the grate is to blame.

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