Starter on Carroro 68.4

[jigs_n_fixtures]

I'd try a fine ball hone on a long shaft, and use an electric fuel pump to keep oil flowing all the time I was doing it. One of these:

Amazon.com

 

[TractorTech]

Ouch! That is horrible! Lot's of rust, no lubrication! That engine might be salvageable, but...... You

I'd try a fine ball hone on a long shaft, and use an electric fuel pump to keep oil flowing all the time I was doing it. One of these:

Amazon.com

Definitely!, but need to pull pistons and do a proper job.

 

[Ivor2]

Can i use sand paper just to get it the rust off .
The rust is only at the top, the rest of the cylinder looks alright .

 

[Ivor2]

What about one of these : https://www.amazon.fr/Cylindre-mote...inements=p_72:437873031&rnid=437872031&sr=8-2

 

[TractorTech]

The hone you show would work, but takes a little bit of skill to not change the cylinder shape. A ball hone, like @jigs_n_fixtures suggested is preferred to remove the rust and crud (red). It also will put back the crisscross hone that the cylinder originally had and eliminate or lessen the vertical grooves (yellow) the cylinders now have. New rings are a must on the pistons.

Unfortunately, I only see a very expensive ball hone on Amazon FR.
In the US, it runs about US$60.

https://www.amazon.com/Research-FLEX-HONE-Cylinder-Abrasive-Diameter/dp/B002XUL1GW/ref=sr_1_3?crid=1OPBWGZW1AQA5&dib=eyJ2IjoiMSJ9.2qM7A9I13fh4_bVdAq1tulp6iAA2wjlzfdtIlSVNEbJEaogUVsj9Q_7ENQenc-YUt00NEhNRbZH9kelJpxGV1nNK1GooJ0oa33dSKGLynA3TJgD9OvB3ROPG5ip8T1oYcEkFFjPIlNJruTYZ-fZYxN5CY6S2UA51b8t1Xkk7fCHLl6vkO97-HCyQIkdhYYLB5xXIyVepQBz1NbR95C5H4heNvvCIsQDU5UlWvqmZCmc.gJU2ygDKwRWtYy55rx-CK5sWXUjMs-B5xPz5TltAHP0&dib_tag=se&keywords=cylinder%2Bball%2Bhone&qid=1743877581&sprefix=cylinder%2Bball%2Bh%2Caps%2C325&sr=8-3&ufe=app_do%3Aamzn1.fos.9fe8cbfa-bf43-43d1-a707-3f4e65a4b666&th=1

 

[Ivor2]

Ok . I've managed to get a piston out here's a photo ;

Do the piston rings look alright or do they need changing ? What's the best way to clean it ?
Here a photo of the sleeve

. it looks alright and might be able to use again . What do you guys think?
Thank you for the help , it's really appriciated .
T

 

[TractorTech]

The rings actually look okay. Remove them and the wrist pin from the piston. Clean everything really, really good. Get the rust and crud off of everything. Bearings look fine. You can reuse.
Hone out the cylinders, clean everything, cylinders, block, pistons, oil pan, everything that has rust and goo on it. Check your oil pump for any rust or goo. Lubricate everything when you reassemble and you might be okay. If you can get it running (I don't know what else you may be dealing with in this engine or fuel system), it will smoke, but may work okay.
Make sure you change your fuel and oil filters. Make sure you flush your fuel lines.
This is all I can say, but good luck!

 

[Ivor2]

Does the the balancer need to be timed ? Can i just take it off and put in back on .
Thanks for the help ,Really appriciate it .

 

[TractorTech]

Yes, it would have to be timed. I looked that tractor up a while back and it is supposed to have a Perkins 3 cylinder 3.152 or 2.5 liter engine, which I didn't think it had a balancer. Can you verify?

 

[Ivor2]

It's a perkins 4.236 4 cylinder 3.9 i think . How do i time it?

 

[TractorTech]

https://forums.yesterdaystractors.com/threads/balancer-timing.1438340/

 

[Ivor2]

Hey
I've a honed a cylinder . What do you think?

Do i need to do it a bit more ? or does it look alright?
How do i get it to top dead centre ?
Thanks
T

 

[jigs_n_fixtures]

Should look like this:

 

[TractorTech]

Should look like this:

View attachment 3257472

Great example

 

[Ivor2]

Ok thanks . How do i mesure to check the limite of material with a tool ?
Thanks
T

 

[TractorTech]

Inside micrometer. https://www.amazon.com/Pc-Precision...cphy=9031506&hvtargid=pla-2281435179298&psc=1


Also, are you using oil to hone the cylinders?

 

[Ivor2]

Yes , i'm useing 10w20 diesel oil if that's allright.

 

[Ivor2]

By the way . How do i get the engine to top dead centre ?

 

[TractorTech]

When the piston is at the top of the cylinder, it is at top dead center (TDC)
1 and 4, TDC, bancer weights will be down. 2 and 3 TDC, balancer weights will be down.
Balancer shaft turns two times to every one turn of crankshaft.

 

[Ivor2]

Hey
Sorry for late reply . So i v'e honed the cyclinders as much as i dared and cleaned the pistons and rings and bearing and put 3 of them back in. i broke one of the rings on the 4 th piston so i've ordered some new rings . I thought yesterday to try and turn the engine over with the starter to see if it was the engine or starter that wouldn't turn it over before so i connected the starter to the battery and it just sparked like before . So i tried turning the engine over by hand . i had to use a metre long bar to turn it . Is that normal for a rebuilt engine ? i turned it over when all the pistons were out and it turn fine . Is it the starter then ? I've cleaned everything in the starter and the brushes look really good as well as the armature . The only thing that's missing the the rubber seal at the end .
Anybody got any ideas ?
Thanks for the help really appreciated .
T