Oil Slick sent me his generator off his D-8 along with a hydraulic pump to make the conversion from a generator to a hydraulic pump to run the tilt cylinder he wants to put on his Machine. I used the gear and the front flange that bolts to his mount and made a spacer and new keyed shaft so the pump would slide together within the spacer. Original generator was 10 inches long and the conversion is 9 3/4 inches long so I will fit in the same place as the old generator. Replaced the fiber pins that lock the gear to the hub with brass pins because I think there will be enough torque on the pump shaft to shear the fiber pins.

That looks real nice Brian! Almost to nice to mount up on the old HO.

I told Paso Bob about it at Pops play day cuz he was looking for a way to operate his tilt cylinder too. Heck if this works out you might get a few more customers

Very nice work Brian. As Mike said, I would like to have one built for my 14A. My most important question for you or anyone else that would comment is, does the oil reservoir have to be higher than the pump in order for it to prime or would the pump pick up the oil from around 1 foot under the elevation of the pump? Thanks, Bob

Thanks Mike. It came out really good and turns smooth. I think you will like it

Paso Bob A gear pump will prime itself. It should be no problem from 1 foot below. The pump on Oil Slick's conversion will pump rotating clockwise or counter clockwise. Just reverse the lines to get a suction line and a pressure line. I don't know how many GPM this pump is but it should work fine for a tilt cylinder. If you want one made give me a call or text 573-433-9277.

Brian, I will be in contact. For those who are savvy on hydraulic systems, what type of gear pump would be best? The only job it will be used for is to operate a tilt cylinder and I'm not worried about speed. Does anyone know the RPM of the shaft that drives the generator on a 14A so one could figure the GPM for the pump? Old Magnet, please weigh in too. Thanks all.

Gear pump is a gear pump, only one kind that I know of and would be fine for that application. Next choice would be gear/rotor pump but Cat did not utilize them, at least not on the old stuff.
The 14A generator delivers max amp at 1070 rpm which is probably about where the pump rating should be.Would have to calculate gear ratios by tooth count to get exact number.

OK, had some time to check out rpm's on the 14A.
Original generator spins at 2.22 x engine rpm. (2664 rpm at 1200 engine rpm) Rotation is clockwise as viewed from operators seat.
Water pump drive if you were to mount hydraulic pump direct off the water pump drive gear runs at 1.43 x engine rpm. (1716 rpm @ 1200 engine rpm). Would require pump gear plus housing not normally supplied by cat. Rotation is clockwise as viewed from operators seat.

Note correction!!!!!! I had the generator gears reversed in my original calculation

Thank you very much Pete for calculating the shaft RPM for me. I will use that information for the purchase of a pump. I think the easiest option will be using the generator drive to power the hydraulic pump.

Brian, what size shaft on the pump should I be looking for to couple up to the generator shaft?

Paso Bob The one on Oil Slicks pump is a 5/8 inch straight shaft with a key. For sure no smaller than that. A 3/4 inch shaft would be great if you can find the pump you need with that size shaft. I will make the coupler fit the shaft you have. Make sure the pump you get turns the right direction. If you can see part of the generator turning with the engine running note which direction the generator turns a get a pump that turns the same direction or one that will pump turning clockwise or counter clockwise. If I'm not mistaken pump rotation is viewed as you look at the shaft end of the pump, CW or CCW.

A lot of fork trucks ran the pump from the timing gears. They were very hard on timing gears.

Of course they didn't have D8 engines, and they were pumping nearly continuously, but don't get carried away here. Does the face of the generator gear mesh with 100% of the timing gear face? I believe not all of them do. I'm seeing questions about bigger shafts, how many gallons. There should be some questions about pressure too.

The bottom line: If you use a pump such as that chosen by Oil Slick, and use it just as he intends to,you're probably OK. At least I'd count on it. If you're planning to grow this thing, you'd better do some engineering.

That would by my $.02 worth, but inflation makes me state it as two-bits worth.

Jack