How To Increase RPMs on 560 Injector Pump

I ask this a few days ago and no one answered on how to increase the RPMs on a 560 Diesel. I just bought a 1960 560 diesel and it only turns 1850 rpms, my dads 1963 560 turns 2100+. How can I turn mine up. Yes, I realize they are rated at 1800rpms stock and 60hp.

Is there anyone on this site that knows how to increase them, or should I just go trade mine for one off a 706 or 660 as they run higher rpms.

thanks,

robert

The 560 (ending with the 686) was the top end in HP for that tractor frame. The 706 was the bottom end in HP for that tractor frame. Since this was the cross over in terms of HP they generally used the same engine that was turned down for the 560 and up for the 706.

The 686 (D312) i had at one time turned at around 1800 and puts out over 70 pto hp vs its rated 67 hp (about where it should be).

My guess is that the RPM are about where they should be to produce the 60+ rated PTO HP.

If you adjust your 560's engine to the 706's spec for the same engine you'll get the same HP as the 706. Pto will turn a little faster.

The trans is the issue as this tractor wasn't designed to handle the higher HP and very early 560 had trouble with their rated HP. I believe their was a recall on the first 560 to beef up the rear end.

It started at -6 the other morning and it was not even plugged in, kinda rough on one cylinder but as it warmed up comes alive.

anyway, I think it will be a good tractor, its got the 656 type fenders, 2 point, brakes are excellent, clutch great, T/A works terrific, power steering good, it has a schwartz or something like that front end.

anyway, thanks for the info,

You don't just jump in on trying to turn up a pump without doing these things first.

It is not hard to set up RPM. First with the engine shut off check to see if the linkage is pulling the arm in the back side of the injection pump all the way back to the hi idle stop screw. Screw should contact pump housing at full RPM setting. Might have to adjust linkage for wear. If ok just back the screw out to desired RPM. Takes a 5/16" wrench to loosen & adjust the screw.

Ted