560 diesel pump

Anonymous-0 · Jun 9, 2009

Does the pump have some sort of key or pin on the drive. I have a guy that is disgusted with his 560 and wants to sell it fairly cheap. Has put on 2 different pumps and says if sheared the key off of both. Any suggestions?

Anonymous-0 · Jun 9, 2009

What shears is the drive shaft. It has a small diameter machined into part of it so that it is designed to fail at that point rather than inside the pump. What happens is the hydraulic head freezes up and then the shaft shears. I have seen it happen just by washing the engine with cold water while the engine is running. I also had a customer twist off a drive shaft while choping ensilage. It was a cool morning and the dew on the corn stalk leaves were slaping the side of the injection pump and cooled it off enough to feeze up the hydraulic head.
Chuck

Allan in NE · Jun 9, 2009

I'll bet that was fun draggin' that dead tractor/chopper/wagon out of the center of the field. :>(

Allan

Anonymous-0 · Jun 9, 2009

The customer did that. I didn't see the tractor until he pulled it to the dealership.
Chuck

Allan in NE · Jun 9, 2009

Yeah,

If the corn was rubbin' the engine, he had to have been opening up a field or land.

Kinda like losing a tire or motor on a center pivot. Nothin' worse than draggin' the things out of that hot steamy corn! :>)

Allan

Anonymous-0 · Jun 9, 2009

What can be done? Is the drive shaft replacable?

Gene- WI · Jun 9, 2009

I don't know what they're talking about, I used my 560 all winter to haul manure and sometimes it was 30 below and snowing and I didn't have any hyd part whatever that is, freeze up and cause the pump to break, generally what happens is the banjo fittings start leaking and the bolt gets tightened too much or the wrong copper washer gets installed and the bolt bottoms out against the shaft causing the pump to bind and breaks the shaft. As far as I know there isn't anything hyd. that the pump drives.

Anonymous-0 · Jun 10, 2009

What Chuck is talking about is the hydraulic head in the inj pump siezes (freezes) and the small diameter part of drive shaft breaks to help avoild farther damage to pump and or timing gears drive train. Ambient temp in itself has no effect on it,as all parts of pump are expanding and contracting in unison, just a sudden cooling of pump itself like cold water on it will cause head of pump to contract before cooling could effect rotor. My experience has always been if they do twist shaft, pump is also damaged. In about 1960, at a service training session, instructor removed the rotor from head of Roosa pump, held rotor in his hand, which he told us of course you never do, and while he continued to give information on pump, then he went to show us he could not put rotor back into head of pump due to expansion from heat in his hand. He then immersed both parts into diesel fuel, we took a lunch break and upon return, rotor slipped right back in. Very close tolerences on inj pumps. Not much room for error.

jngreen · Jul 6, 2009

where can I find a replacement driveshaft?

I have a 560 that sheared one, I have another pump to try cause the original is still locked up. Now I need to replace the driveshaft.

560 diesel pump

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