1959 IH 460 diesel questions

GoJDpuller · Mar 2, 2009

Im posting for a friend, he just got a 460 diesel and it runs very rough. First off in the summer it starts hard without being plugged in. It runs rough when idling and gets better under a load. Also it has a knocking sound, the oil pressure is good and oil level good. The guy he got it from sayed it cleared up once when he was baling hay in the summer 90+ degrees. When they were leaving the field they reved it up to leave and it started running rough again. Our guess is that its timing or a injector problem. This is the first diesel tractor either of us has owned. Any input would be helpful, thanks for the help.

scott mcintosh · Mar 2, 2009

two things to check on change fuel filters,then check glow plugs,you need lots of preheat with glow plugs to get them started.Two other things to know,good working thermostat and no ether unless you want head gasket troubles.Scott

Anonymous-0 · Mar 2, 2009

I'll address clearing up the exhaust after it is running and warmed up. These engines have a load advance system on the injection pump. What it does is advance the timing at all no load conditions , high speed or low speed and then it retards the timing as you come under a load. It is easy to adjust but you need to put a window on the pump in place of the timing cover. You would need someone experienced in doing adjustment or a manual showing how. Kind of hard to explain on here. Best way is on a dynamometer but have adjusted a jillion by observing advance mechanism when quickly reving engine. Of course you could have it done on a test bench also. Static timing is 3 degrees BTDC. Fuel pressure of course needs to be up to specs when doing adjustment also. They will sound awful if advance is not working and timed correctly.

JJK · Mar 2, 2009

Glow plugs are a must on those engines so check them first. Checking the timing wouldn't hurt so you know that it's right. The injectors probably need to be checked also. There could be 1 or 2 that might be stuck open and just dumping in fuel prematurely causing hard starting and a rough running engine rather than injecting at a proper time. These are cold blooded engines but they shouldn't be as tough as yours. I worked on a friends 460 and replaced all the glow plugs and wires just to get it to start on a warm day after it sat for many years. Best of luck to ya!

GoJDpuller · Mar 3, 2009

Thanks for the input, is there a good manual to buy? He asked a guy who has rebuilt these before about helping and all he told him was get rid of that pos.

Anonymous-0 · Mar 3, 2009

As far as a pos, well, I always said in my later years that I was going to buy one of these 460 diesel's just to get even with it and fix it up my way. Haven't done that yet,probably won't. There is a saying around here that if you walk around them with an ice cream cone they won't start on a hot summer day. If you have one with the engine up to specs, late style micro injection nozzles, improved inj pump etc, they do run pretty decent. They never had a good starter though, no matter how big cables and batterys you have. The later 282 like in a 656 will whip right over and take off, and seeing as how the two clutch housings and the flywheel are near identical on the two, I wanted to experiment with adapting that starter to the 460 but, like I said , probably never will. I am sure others have a lot of ideas on this.

Too Far Gone · Mar 3, 2009

Ive been through this several times.The reason it got worse when he reved it up is because of the bad injector,or injectors.They arent delivering the fuel the way they are supposed to,and when reved up even more raw fuel gets dumped in there and hammers and smokes,and it'll cause them to heat also.Thats been my experience anyway

DWF · Mar 3, 2009

I recently bought a small Galion Grader which had a UD 236 engine, same as 460D only a little newer. They had had a lot of trouble starting it and it didn't run very well at all. First thing I found out is the injectors were in wrong. They had the glow plug on the bottom, below the fuel line. I found out on this site that that makes a difference in starting. It had been this way for a very long time as it had been painted a long time ago and you could tell the injectors had not been removed after the painting. The starter has to be in good condition to spin the engine fast. When I took the injectors out, 4 of the 6 were leaking. I purchased new glow plugs, rebuilt injectors from Central Fuel Injection, a rebuilt starter and new wiring. Starts and runs perfect now although it is a cold blooded engine.
DWF

Owen Aaland · Mar 4, 2009

For some reason IH changed the valve recession specs to a minimum of .048". Original specs were .003" to .048". If you rework the valve seat to get the recession as close to .003" as possible, it makes a big difference in how easy a 460 starts. It helps on the D282 engine also but not as much as the D236.

1959 IH 460 diesel questions

GoJDpuller

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scott mcintosh

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Anonymous-0

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JJK

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GoJDpuller

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Anonymous-0

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Too Far Gone

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DWF

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Owen Aaland

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