So far my travels have come up empty handed as most folks that answer the phone stall quickly if you don't have a model of the forklift equipment for them to use in a search engine on a computer.  Matching by the fan's design specs appears to be an option that is not included in their search engines, and no experience with the equipment in the field leaves them with no background to call on while trying to chase down a part.

I'm also tracking down a lead to a manufacturer of fans for OEM applications that may be able to come up with something based on the fan's design specs.

Thanks for your help.

When I picked up this stationary generator, it wasn't until I got it home and started working on getting it started that I discovered the pump pulley sat forward of the crank pulley plane by about 3/4", and the fan belt was running at an angle.

Upon disassembling the fan and pump pulley assembly, I discovered that someone had done a hack job on this generator and it appears that they were given a water pump from a different D-262 application and when they discovered the pulley and fan didn't fit properly, they bashed a spacer together that didn't fit the pilot hole in the fan so they used washers between the fan and the spacer to establish a flat surface for the fan hub to rest on, relying on the mounting holes to keep the fan centered.  Whoever did this had to have seen the misalignment but shrugged their shoulders and walked away.  Guess they were part of the, "Let the next guy deal with it.", crowd.

Based on the history of the generator, the original installation called for a blower style fan.  Once I found the correct pump and pulley for the engine, I was able to machine a custom spacer for the pump hub that provided the proper pilots for the fan and the hub.  The unit is up and running with the suction fan, but I'd need to find the blower fan as I'm going to donate the generator for a project and it will require a blower fan.

The quick and easy is to simply install an electric fan with a blower blade pitch.  The unit is in such good shape, I'd like to keep it as close to it's original old iron equipment as I can.  I may lose to function over nostalgia.  Thanks for the info.

Look at the data plate that's on the engine in this picture. It will list all of the option groups that made up this particular build. A outfit or person with the AC parts listings should be able to look up the individual option groups which in turn will list each individual part numbers for every nut and bolt that went into this generator set build. 

The data plate shows a part number of, "4514744, 17” Fan, Blower".  I've been using this number when contacting parts suppliers but evidently it's old enough that they no longer have a cross for it.  At least the folks I have talked to so far including AGCO.  

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Look at the data plate that's on the engine in this picture. It will list all of the option groups that made up this particular build. A outfit or person with the AC parts listings should be able to look up the individual option groups which in turn will list each individual part numbers for every nut and bolt that went into this generator set build. 

I've only seen one other one in this power range.  I have a suspicion there may be a fair number of them out there using a military nomenclature, but I haven't had time to go down that path yet.

The radiator is in great shape.  My problem is, as a piece of old iron I'm trying to keep it as close to the original design as possible by installing the correct fan that was on there when delivered.

The other issue is, this is going to go inside an enclosure to protect it from the elements and that necessitates a blower configuration for the radiator.

 

Flipping the fan 180 degrees came to mind, but a close study of the blade contour showed that it is slightly "J" shaped, as opposed to a flat paddle shaped surface.  If it was completely flat, flipping it would fix the problem.  The bottom of the fan blade on the engine is curved directing air off the blade face towards the engine as it is now installed.  Reversing the blade would move some air through the radiator but with no where near the efficiency of a proper fan for a blower application.

As to the incorrect pulley and fan on the engine when I got it, after my own experiences tracking down parts, I'm beginning to have the  suspicion that whoever installed the incorrect parts may have needed a new water pump and found a used assembly complete with the pump, pulley, and fan.

Beings that the back of the new pump was identical to the old pump, whoever installed the new parts did not go through a complete check for fitment before bolting everything down.  Failure of the fan belt to line up on the pulleys was the red flag that came too late, and apparently whoever did the work finished off with, "To hell with it", and left it for the next guy to do it right.

You're correct, it's on the engine plate.  I've been using this number for about a year with no success as yet.  I've worked my way through most all of the Allis Chalmers Tractor sites I could find and now I'm working my way through anything I can find for forklifts.  My next list is anyone that deals with stationary generators,  and then on to the military.  The fan is out there somewhere, I just need to stick with it.

Thanks for all the input.

Look at the data plate that's on the engine in this picture. It will list all of the option groups that made up this particular build. A outfit or person with the AC parts listings should be able to look up the individual option groups which in turn will list each individual part numbers for every nut and bolt that went into this generator set build. 

The number 4514744 17' FAN, BLOWER  that's on the data plate isn't the P/N for the fan but, is the group number. The group number breaks down into each individual P/N for each part that is used to make up the group. "IE" quantity and part number of mounting bolts, washers, spacer if used and the part number of the fan its self.

The number 4514744 17' FAN, BLOWER  that's on the data plate isn't the P/N for the fan but, is the group number. The group number breaks down into each individual P/N for each part that is used to make up the group. "IE" quantity and part number of mounting bolts, washers, spacer if used and the part number of the fan its self.

Ok.  Now I'm onboard.  I remember seeing those groups in some of the engine manuals I've been able to get my hands on.  I'll retrace my steps and start looking for the group.

In trying to cross this engine to the ones used in the tractors (D17, D19, WD45) to determine the year of manufacture, my speculation has been that this unit might have been made in the mid 1960's.  Could my unit be from the mid seventies based on what you see in the photo?