international 660 injector pump??

[Overland660]

I have a 59 international 660. A couple years ago the tractor died and wouldn't start. I tore into it and found the shaft in the injector pump was broken. Diesel Algae. I
sent the pump to a shop and was told they can't rebuild it because the shaft was broken and that meant it was something in the pump that was causing too much pressure.
So, I started looking for a 660 pump. I found one but they would not take my core because of the broken shaft. I finally found a place that said they had a pump. I gave
them the numbers off the pump and they said we were good to go. So, I bought it and the one I was sent is for a 560. I don't know a lot about the details of these pumps
but I have read what I could find about them on google searches and in my manual. I know the 660 runs at 2400 rpm and the 560 is an 1800 rpm. I also know when timing this
pump to the motor that the 560 should be set at 3* BTDC and the 660 at 5* BTDC. I have read in several unrelated articles to set it at 7* BTDC, is this true for better
power, fuel savings, but harder to start? My question here is what is the real difference in the pumps between a 560 and 660? It is difficult to find a 660 pump (2400
rpm) but easy to find a 560 pump (1800 rpm.) So can I use this one and still have a true 660? if I time it at 5* BTDC? Or am I going to have a 560 hp rated 660? Thanks
for any info you guys can give me.

 

[rustred]

simple... you will have an underpowered 660. but no problem using the tractor. I have used a 660 pump on a 560 as that is all I had at the time. just did not run it wide open.

 

[rustred]

dieseltech will give you the details as to the load advances for each pump.

 

[Overland660]

Do you know what the actual difference is inside the pumps?

 

[Dieseltech]

Main difference between the 560 and 660 is the full load speed as a different main governor spring is used, BOTH pumps have the SAME fuel flow settings, and BOTH have 4 degrees light load advance. The 5 degree BTDC setting can SOMETIMES help a 560 too over the 3 degree stock 560 spec. For the drive shaft to break the hydraulic head was seized, and SHOULD have been pressed apart to find the seizure location on the rotor, to know for sure WHY it seized in the first place. I WON'T release a repaired pump until I see what caused the wrecked pump damage, too expensive to just install another pump and risk wrecking another one...

 

[Overland660]

So if the shaft broke in the pump could that be caused by plugged injectors? or something else outside of the pump? I have different injectors to replace the ones in there now. I don't want to put another pump on there if there could be an outside problem that caused the first one to fail.

 

[rustred]

dieseltech, when you bench test a 560 pump can they be set to the 660 spec's? like rpm?

 

[Dieseltech]

Several things can cause a head seizure/broken drive shaft. Water/dirt in fuel, plugged injectors, drive misalignment, stuck transfer pressure regulator, one missing banjo bolt line washer, wrong blade size, incorrect valve stop torque. Water is the most common cause. Stanadyne/RoosaMaster service manual seizure bulletin is used to compare the rotor damage location after the rotor is pressed out of the head/barrel assembly.

 

[Dieseltech]

Yes, but the governor response will be a slight bit lazy from no load to full load. Most 560s are sped up a bit around here anyway and owners do just fine as they are.

 

[rustred]

thanks.

 

[Dieseltech]

The IH 460, 560, and 660 all use a 4 degree light load advance injection pump. At low idle, and high idle no load pump cam ring is moved the 4 degrees pump advance. At 1/2 load at any speed the advance cam ring is moved back to the 2 degree range. Under full load the cam ring moves completely back to start/no advance position. It's BEST set on the pump test bench, but I have set a few with tractor running on a PTO dyno to change the engine load and check the cam ring advance with the bat wing gauge. Some IH 656 had load advance too, and some had speed advance like the 706 had.

 

[Overland660]

I have cleaned all the fuel system parts i can. I have different injectors and pump. I hope it will work. If not than its off to the scrap yard.

 

[caterpillar guy]

Overland Why not just send the components to Dieseltech and let him solve your problem. Lines Pump and injectors. Cheaper than guessing and time spent.

 

[Overland660]

Yeah im thinking that would be the best.

 

[Overland660]

Thank you everyone for the info and help.