VAC Project: We have ignition.........

The VAC started under its own power this evening, and there are no bad really things to report.

The bad news is..... .. I did burn all the pretty paint off of the muffler, so it will have to get a coat of Eastwood Stainless High Temp (that�s what�s on the manifold, and it seems to be staying on pretty nice so far).

I ran it all totaled for about 90 minutes. I set the idle at a little above normal (she�s still a bit tight) and the high end I set with my handheld electronic tachometer on the PTO at 525. The timing is just a few degrees advanced. I�ve looked and I�m not sure I am reading the book correctly. Anyone know what it should be at high speed with a light? I see 4 BTDC one place in the service manual. I restarted it several times, and it groaned but fired. I even crank started it a couple of times.

The Eagle hitch goes up and down and stops where you set it, and by golly, it even charges in the three positions (nearly 20 amps!). Oil pressure is running about 15 PSI on high speed, and probably around 7-10 at idle, but it�s really hard to tell with a 40 pound gauge. I wish I could find a Case gauge that read in the old graduations.

I want to thank everyone for helping me get it this far, but I�m afraid I might leave out someone�s name, so please understand that this is a big THANK YOU to everyone who helped me find parts, specifications, paints codes, and offered words of encouragement. I�m still working on the final piece of tin, which is the front grill and it is in pretty tough shape, so it might be a while before you�ll see final pictures. But I promise that I�ll get a final report together to post here and on my site.

Again, thank�s to everyone.

Frank-in-Tallahassee
70D // 855 // VAC
[email protected]

• F-I-T's webpage.....ALWAYS under construction....

My manual is 1600 rpm no load, 1425 rpm full load also for the rated pto speed of 525 rpm. Oil pressure is measured at operating temp and 1425 rpm, 12-20 psi. I think that I would pull the valve cover after idling down from a test run and see that there is some oil flow for the cam bearings. Doesn�t take much. You probably already checked that the oil feed tube was still in the oil filter housing right?

Joe

Yup, the feed tube is in the oil filter assembly, and the oil filter gets warm, so oil is circulating in there. I took the valve cover off, and it's oiling pretty well. A few more hours of running and I'll touch up the valve lash.

I've got a slightly sticky governor rod on the high end, but it's from excess paint, so a little wear and a drop of oil should take care of that. It really starts easy!

Frank

"To time distributer to engine turn engine till number 1 piston is on compression stroke and flywheel mark is centered in the timing port. install the distributer unit to the cylinder block with rotor finger under number 1 terminal in cap. Then rotate distributer counter clockwise direction until breaker points have just opened. then tighten the distibuter and its supposed to be timed."

Thats what the book says.. Oh ya and the service chart says "TC"..

Hope that helps.

In rereading your initial post, I see that I repeated info that you are already well aware of and did not answer your specific question.

The entire advance from engine idle to full rpm is listed at 26 degs. The stop in the distributor is also set at 26 degs.

My manuals do not indicate the initial setting except that the points should just start to open at TDC. If you checked that with a light the setting will be at TDC at idle since the distributor governor does not advance until slightly above idle speed (50 rpm or so).

This table from the manual is the advance curve in distributor rpm and degs:

0 deg adv @ 275 rpm
1 deg adv @ 300 rpm
8 deg adv @ 475 rpm
12 deg adv @ 800 rpm
13 deg adv @ 875 rpm

From the above it appears that some initial advance is required. It looks to me that the 4th line would be right for the rated no load rpm of 1600 if the initial setting was 2 degs BTDC.

Perhaps an initial set of 4 degs BTDC is correct for full load rating of 1425 rpm.

Joe

Brandon
My Industrial John Deere website
John Deere Diesels
The LaGrange Engine Club