Case 680E

[propane1]

Works great. Thanks for the video.


Noel

[Timj]

whoo hoo IKO Excavating Inc. is in business! Nice job

[MattA]

Looks like fun Eugen

[JSinMO]

Good video! Sure looks like the work you put into the tractor paid off!

[Eugen]

Thanks guys, it's nice to get encouraged.

This thread is getting to be pretty long so I won't blame anyone for forgetting how I was wondering at the very beginning how the backhoe engine sounded rough. Other issues took priority, like the diesel in oil, leaky cylinder and hoses. Had the injectors done too for good measure. A few smaller things too, like the breaks.

This monster has no lack of power. It lifts the tractor like nothing when it gets snagged on a stump. Yet, it felt to me still like the engine could be smoother. So I adjusted the injection pump timing from this

to this

Made no difference. I wondered from the beginning if it might be running in three cylinders and as much as I hated to find out, I had to.

Cracked the injector lines one by one while idling. Idling got a lot worse when cracking lines on cylinders 1, 2, and 3, but no change whatsoever on 4. This can explain some of that white smoke and oil through the breather.

At this point one sits down and considers why one cylinder doesn't go boom. The major culprits ought to be no compression or no fuel mist. I opened the valve cover and checked the rockers for signs of trouble on cyl 4 valves but there was nothing unusual. While there I adjusted all the valve clearances to cold spec, 0.015 intake and 0.025 exhaust.

Can you see a compression test in my future?

[propane1]

We’re you advancing the timing or retarding it Eugen. Just wondering. Doubt that it would make any difference in number 4 cylinder.


Noel

[Eugen]

Was trying to set them right like in the manual.

[DavidBarkey]

Diesel compression testers are a different animal than gas engines and are expensive . But in some cases you can fab one up with a high pressure hydraulic gauge inline check valve hp hydraulic hose and npt hydraulic fitting to go in where glow plug goes .

[MattA]

When it's fixed you will have 33% more power

[Eugen]

Gotta see the silver lining here @MattA or else I go insane.

@DavidBarkey yeah, I've been looking for one. Worse, this machine has no glow plugs and the injectors are pencil type, so they require a certain harder to find adapter for a compression test. I think I found one and yes $$$.

Though what's the chance that the head doesn't have to come off, at the very least? Pretty much zero. It's either rings or valves. So then, why bother with a compression test?