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Petter A1 by first time restorer

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Petter A1 by first time restorer Empty Petter A1 by first time restorer

Post by richardistone Sun Jun 16 2019, 11:29

Moving the thread to here from New Member area.

I'm a first time restorer working on a siezed and very rusty Petter A1.

Petter A1 by first time restorer Img_1510

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Petter A1 by first time restorer Empty Identification

Post by richardistone Sun Jun 16 2019, 11:38

Contacting Jim Perkins I discovered my engine was sold to Sturgeon Bros, Diss, Norfolk on 10th July 1947 making it a smidge under 20 years older than me! Sturgeon Brothers were agricultural engineers, some of their records are held at the Suffolk Records office so I'll visit there at some point.

Petter A1 by first time restorer Img_1511

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Petter A1 by first time restorer Empty Govenor

Post by richardistone Sun Jun 16 2019, 11:41

After lots of soaking and tapping I eventually had to resport to heat to rmove the pin that is used as the govenor arm on the gear housing. A bit of straightening required here!

Petter A1 by first time restorer Img_1512

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Woodsman Sun Jun 16 2019, 11:43

Hi Richard,

Best of luck with your project.
PM me with email address if you need a manual.

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Petter A1 by first time restorer Empty Starting Shaft

Post by richardistone Sun Jun 16 2019, 13:09

I thought I'd posted this earlier but it's yet to appear?

Dismantling is progressing nicely, first tin of penetrating oil is empty! Having removed the starting shaft assembly, how do I separate it for cleaning and painting please? Also, should I replace the spring? Thanks.

Petter A1 by first time restorer Img_1516

Petter A1 by first time restorer Img_1515

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Robotstar5 Sun Jun 16 2019, 22:28

Push the collar back against the spring and it will expose a wire circlip, remove this and the collar followed by the spring will slide off the shaft, the shaft can then be pulled out the other way being careful not to damage/tear the felt washer.

Petter A1 by first time restorer Collar10

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by richardistone Mon Jun 17 2019, 04:25

Robotstar5 wrote:Push the collar back against the spring and it will expose a wire circlip, remove this and the collar followed by the spring will slide off the shaft, the shaft can then be pulled out the other way being careful not to damage/tear the felt washer.


Excellent, many thanks Stuart

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Petter A1 by first time restorer Empty Snail eviction time

Post by richardistone Sat Jun 22 2019, 11:05

Head is off Smile One stud came out too. Looks like I'll now have to evict a family of snails.

Petter A1 by first time restorer Img_1517

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Petter A1 by first time restorer Empty Manifold Removal

Post by richardistone Wed Jun 26 2019, 18:16

The target for this weekend is the removal of the exhaust and carburetter manifold. Any thoughts on the best technique please? The nut on the stud is badly corroded away such that a spanner (would it have been 1/4 W?) will no longer grip.

Petter A1 by first time restorer Img_1518

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Post by maryalice Wed Jun 26 2019, 18:32

Richard,
Give the nut and stud a good soaking in release agent over night, then find a socket that is a close tight fit and hammer it onto the nut, if that doesnt work use a die grinder to grind away one side of the nut.
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Petter A1 by first time restorer Empty Stud work

Post by richardistone Wed Jun 26 2019, 19:03

maryalice wrote:Richard,
Give the nut and stud a good soaking in release agent over night, then find a socket that is a close tight fit and hammer it onto the nut, if that doesnt work use a die grinder to grind away one side of the nut.
Maryalice

Brilliant, many thanks, that worked a treat Smile

Petter A1 by first time restorer Img_1519


Now, what is the proper / best / easiest way to remove a stud?

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Post by maryalice Wed Jun 26 2019, 19:07

You can by studd removing tools which lock and grip the stud as you undo or do up the stud.
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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Robotstar5 Wed Jun 26 2019, 19:13

Do you need to remove the stud?, I cleaned & painted mine in situ then just ran a die down the threads to clean them up.

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by richardistone Thu Jun 27 2019, 07:42

Maryalice wrote:You can by studd removing tools which lock and grip the stud as you undo or do up the stud.

Robotstar5 wrote:Do you need to remove the stud?, I cleaned & painted mine in situ then just ran a die down the threads to clean them up.

Thank you both for those thoughts. I'll see how things progress!

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Appletop Thu Jun 27 2019, 07:54

To be fair if the stud is pitted and looking past it's best a replacement is always better as it looks nicer, getting it out you can use 2 nuts back to back and try that, mole grips will sometimes work but will muller it, if you have a welder then weld a nut to it, again this will render the stud useless. Proper stud remover tools are around but I've managed without one for years.
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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Robotstar5 Thu Jun 27 2019, 10:18

Mine wasn't too bad...

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Petter A1 by first time restorer Empty First bit ...

Post by richardistone Mon Jul 01 2019, 17:41

... cleaned and painted ready to go back on Very Happy

Petter A1 by first time restorer Img_1520

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Petter A1 by first time restorer Empty I'm guessing ...

Post by richardistone Mon Jul 01 2019, 17:42

... that both valves being up is a bad sign, especially where the inlet is not touching the cam shaft follower? No

Petter A1 by first time restorer Img_1521

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Post by Appletop Mon Jul 01 2019, 17:51

To be fair I'd be more worried about the tin work than the valves, it probably just a little gummy. I think I have spare valves at the old house.
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Petter A1 by first time restorer Empty Key won't shift!

Post by richardistone Thu Aug 15 2019, 18:23

I've made a puller to try to shift the gib key on the belt drive wheel, its 5mm steel angle with M10 bolts. Tried it yesterday, initially soaked in penetrating oil then after applying heat, but all I've done is destroy the puller!
Petter A1 by first time restorer Img_1610

Do I need to remove the shaft extension piece first? If so is it conventional or reverse thread as I've tried both and that won't shift either!
Petter A1 by first time restorer Img_1611

Any ideas what I can try next please? Thanks in advance.

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by maryalice Thu Aug 15 2019, 19:05

Try a slide hammer, easily made from a piece of bar and a lump of metal to side along the bar, weld the bar to the key and hammer it off.

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Robotstar5 Thu Aug 15 2019, 19:26

In the 2nd pic it looks like there is no where for the key to go when you pull it?

Is the shaft on the left with the keyway the extension piece you are on about?

The shaft is a standard thread - ¾" BSF

Petter A1 by first time restorer Shafte10

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by Appletop Thu Aug 15 2019, 23:10

[quote="Robotstar5"]In the 2nd pic it looks like there is no where for the key to go when you pull it?

Is the shaft on the left with the keyway the extension piece you are on about?

The shaft is a standard thread - ¾" BSF

[url=https://servimg.com/view/20008529/240][img]https://i.servimg.com/u/f93/20/00/85/29/shafte10.jpg[/img][/url]
[/quote]

The smaller shaft should still allow the key to come out of the main crank. Looking at the key it's going to be a slide hammer or curved key drift job that one. A bolt type puller stands no chance. Needs shock, not gentle pull.
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Post by richardistone Fri Aug 16 2019, 07:51

Thanks for all your thoughts. I'll progress and will report back.

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Petter A1 by first time restorer Empty Re: Petter A1 by first time restorer

Post by richardistone Tue Sep 17 2019, 18:42

OK, so my first engine has gone on the back burner, still siezed Sad

The good news is that I've found a replacement Smile This one turns over and has good compession, plus the tin work is much better! This one is also a norfolk engine, it bears a second "makers" plate and dates from 1949.
Petter A1 by first time restorer Img_1612

I'm currently beaming because I've removed my first gib key, using a slide hammer as recommended above
Petter A1 by first time restorer Img_1613

One part I cannot transfer from my first engine is the magneto. This engine has the govenor still in place, is there a specific model of magneto I need to find?
Petter A1 by first time restorer Img_1614

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