Back again with my 574, no start

[Southy]

Hey all. I posted back in '24 with my 574Dwith cav fuel system that had starting issues. Gave up wrenching on it for a while and it sat for about 18 months now. And im getting back to it. Here's the new scoop.

Last time it ran, it died on me in the field. About 200 yards from the house. Yesterday i Popped a new 1000cca battery and 0g wires for battery to starter and battery ground. Hooked up a generator running a battery charger/jump pack and decided I'd limp it back to the house using the starter in gear. Not ideal, but with nothing to tow it and no neighbors to ask, that was the option.

After about 10 minutes of creeping along, cranking for 15 seconds at a time, it started to fire. Got it to start, had to keep cranking the engine for about 30 seconds after the first sign of life to get it to stay running. Drove it home, let it idle for around half an hour. Went to make a victory lap up and down the path and it died on the uphill.

When it started fuel cap was off, cap was back on when I went to drive it and it died. Possibly a clogged vent? I checked the bottom of the tank where I have seen a petcock on other pictures around the board, and mine just has a plug in its place.

Current condions. 30 degrees outside. Fuel cap loose on the tank. Stop/start/run lever in what i believe to be in start position. Blows white/gray smoke when cranking but no start. Same result with lever in run, and throttle up down or halfway.

Have the battery inside on the tender, going to go out when sun comes up to try again with a few shots of ether to see if it will catch on the diesel. If I get it to the house, I will drain the old diesel and put in fresh, and try to get it again.

Any thoughts? I think the big issue why its died a few times is a bad vent line. Any way for me to check that? Compressed air down the vent tube in the tank? Maybe vacuum on that line instead?

I am determined tk get this pig running soon so I'll keep updated on what I do. Thanks all.

 

[Mrfred54]

Your tractor has a cross over fuel line from the left side of tank to the right. If the fuel gets low enough the right side will become empty if the cross over line is plugged. When you look in the fill hole and see fuel bout half way down that does not mean you have fuel on the right side, where the engine draws fuel from. Open the bleeder valves on the filters, do you have fuel and no air?? On your model I also crack the line loose on top of the injection pump and make sure you have fuel there. Its the line that comes from the filters across the front off the engine to the pump. Also, you mention a vent line, your cap still needs to be vented. Guess I don't recall a vent tube on this tank, been awhile since I've worked on a 574

 

[Southy]

Got it running again for a bit. Moved it down to house so now I can leave it on a charger. Died while idling in the driveway.

Cranked for a bit, Started up off a blast of ether with handle in the run position. Idle good for 5 minutes or so, so I cracked the injector return lines and no bubbles came out. Checked around the lines, saw a leak at the right front petcock on the tank. Pulled it out, some crud came with it, fine rust. oring was ugly so I replaced it. Got it back in and did the same with the both crossover pettcocks, and let some fuel run out of the crossover hose, no debris came out of it.

Let the electric lift pump run about 5 minutes and cracked the injector returns, no bubbles. Spritz of ether, started up as usual. Cranking the starter, Slow firing til it catches idle speed, then holds idle without starter. Had full throttle control. Let it idle at around 1500 to try and clear out any air in the lines. Turned the idle down, it would surge up and down rpms for about 10 minutes before it finally reved down and died out.

That's where im at. Gonna go back out in a bit and double check for leaks.

 

[miangus]

Reving up and dying is a sign you ran out of fuel. I assume you have changed the fuel filters. Could the return on the pump be blocked?

 

[Southy]

Photos of fuel system. Filler neck, left and right tank halves, crossover line, lift pump, filters, injection pump, injectors.

 

[Southy]

Reving up and dying is a sign you ran out of fuel. I assume you have changed the fuel filters. Could the return on the pump be blocked?

Fuel filters were changed before it sat for that long stretch. Wouldn't hurt to change em again after I drain the tank and rinse it out with diesel. If it looks terrible in there I'll take it off and seal it when weather warms up.

There is a little pre filter at the lift pump that I bet needs cleaned or changed.

 

[Southy]

Your tractor has a cross over fuel line from the left side of tank to the right. If the fuel gets low enough the right side will become empty if the cross over line is plugged. When you look in the fill hole and see fuel bout half way down that does not mean you have fuel on the right side, where the engine draws fuel from. Open the bleeder valves on the filters, do you have fuel and no air?? On your model I also crack the line loose on top of the injection pump and make sure you have fuel there. Its the line that comes from the filters across the front off the engine to the pump. Also, you mention a vent line, your cap still needs to be vented. Guess I don't recall a vent tube on this tank, been awhile since I've worked on a 574

I'm getting fuel at all 4 injector return fittings and no air. I will attempt a full bleed starting at the tank and ending at the return line next.

 

[Southy]

Also, you can see in the pic above, I have no valve on the breather port at the bottom of the tank. Sprayed some ether down both of the pipes seen in the filler neck photo. Nothing came out of that hole at the bottom of the tank.

 

[JimB2]

Hi, you definitely have a very early 574 with the CAV fuel system.
The worst thing about thing about those tractors is the saddle fuel tanks getting crap in the bottom blocking the outlet on the bottom right or the cross over line getting plugged and the right side empties and there is fuel in the left side.
I see someone has replaced the mechanical lift pump with an electric pump, with a clean bucket, I would take that rubber fuel line off the end of the electric fuel pump and turn on the ignition switch to activate the pump and check the flow out of the pump.
If the flow is bad the most likely cause is crap blocking the shut off outlet valve on the bottom right side of fuel tank. Blowing back on the fuel line before the electric pump will usually fix the problem for a short period but only solution is to remove shut off valve and drain crap out of the tank.
Re STOP/START/RUN lever, there is no START position on the CAV pump, make sure in RUN position the lever on top of the pump is against the stop and wide open throttle.
Re free manual download for IH 54/74 Manual Download:

D239 / 674 Engine Manual pdf

------------------------------------ Post updated with links to the engine manuals, thanks Oleman! I've run these through text recognition; can be searched in PDF now. ------------------------------------ Hi Folks, Trying to find a PDF copy of the D239 engine manual for my 674, need to replace th...

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Re fuel filters, see photo below, I believe you have the good ones like the one on the left with the holes in the top, the one on the right has caused problems with fuel flow.

 

[Jim.ME]

If one of the tubes is supposed to be the vent run a welding filler wire or other stiff straight wire, down through it to rod it out. I have had to clear some JD crawler tank vents, that use a tube from the top inside the tank and out the bottom of the tank as breathers. Over time dust, dirt, mud dobbers, etc. can block the tube.

 

[Dieseltech]

The 3166 filter is OK IF there's NO EXTRA O RING placed in the filter top OUTER groove, that's the fuel INLET passage and MUST NOT be blocked.

 

[Southy]

If one of the tubes is supposed to be the vent run a welding filler wire or other stiff straight wire, down through it to rod it out. I have had to clear some JD crawler tank vents, that use a tube from the top inside the tank and out the bottom of the tank as breathers. Over time dust, dirt, mud dobbers, etc. can block the tube.

Good idea. I'll give that a shot, I think I have some tig rod that will fit.

 

[560Dennis]

I see a brazed line on the pump in this photo . Is there flux flakes or bb s of braze blocking off fuel lines?

 

[Southy]

I see a brazed line on the pump in this photo . Is there flux flakes or bb s of braze blocking off fuel lines?
View attachment 144450

Do you mean above the filter? Not sure which pipe off the pump looks brazed.

Either way, I think I've found the culprit. Or at least a contributing factor.

 

[Southy]

The primary fuel filter base has a drian plug which is just a suckin in air like crazy. No idea how ive missed this.
Opened it up, here's a pic of the threads.

Gonna have to size that up, threads are pretty wooped. The bolt that was in it spun while I was trying to cinch it down.

Should I do straight thread with an oring, or npt?

 

[Jim.ME]

Either would work if done correctly. It looks like that was originally straight thread plug with a nylon, fiber. or other type of sealing washer; it doesn't appear to have the lead in chamfer that would be there for an O-ring.

 

[JimB2]

From CaseIH 454 European CAV Fuel System parts, Item #1 Part # 3072558R1.
Google Part # 3072558R1 and see if there any available.
MF and some Ford tractors used the same CAV fuel system.

 

[Southy]

From CaseIH 454 European CAV Fuel System parts, Item #1 Part # 3072558R1.
Google Part # 3072558R1 and see if there any available.
MF and some Ford tractors used the same CAV fuel system.

View attachment 144502
View attachment 144503

Thanks for the diagram Jim, I'm going to see what I can get for the baseplate and the drain plug.

I previously purchased a complete filter assembly with the top bracket and such, none of the lower components interchange with the original cav top end.

May have to go with the aftermarket assembly if oem baseplate is not available.

Edit: found the baseplate with plastic plug installed. If my fix doesn't work I'll order it payday

 

[Southy]

Ended up going for 1/4 npt plug, bought a tap and drill bits for it. I'll get that whipped up tomorrow at work and hopefully get it on the tractor in the afternoon.

 

[Southy]

Drilled, tapped to 1/4 npt, sandblasted and painted. Putting it on tomorrow because of the weather.