Farmall 240 Utility Hydraulic Pump

A puff of white smoke and a trail of oil. Knew something was wrong. Drained three gallons of oil from the engine oil pan, and the transmission hydro oil had disappeared. Then I really knew something was wrong. I pulled off the hydro pump, part number 19-994501-99, and broke it down. I found a replacement pump on this site for about $500. Would like to rebuild instead. I have found zero pump parts after eight hours of searching the web. It appears that my problem is in the rather large part that is second from right in photo number two. This part actually fits up against the engine and I shall refer to it as an "end cap" until somebody tells me the parts manual nomenclature. I couldn't find any parts diagrams either. The rectangular rubber ring on the backside of the end cap looks ok, but I will get a new one if I can find one. The 3rd photo shows the hole, (bearing?) in the end cap that looks and feels very sick. The shaft of the gear that sticks in the bearing is not perfect, but still in very,very good shape. The gear I refer to is the longest one in the second photo. Before I start bugging some of you who actually know what you are doing (I don't) about putting the whole thing back together properly, can anyone offer leads to parts, or alternative repairs. Thanks for sharing my misery!

IIRC, there were two companies that made pumps for these, Thompson was one, don't recall the other.
The plate you reference was called a "front plate" by Cessna/Eaton (where I worked for 38 years), but don't know what the IH pump manufacturers called them. Generally what goes wrong is the seal is bad in the front plate and a groove gets worn in the shaft. A new seal and "speedy sleeve" from most industrial supply places, like IBT, will fix that problem. If the bushing is worn in the front plate, you may need to take it to a hydraulic repair shop and have them replace the bushing. If the gear pocket is worn or grooved, it depends on how bad it is. Bad enough and you will be better off trying to find a better used pump either for use as it is or for rebuilding.
BTW, I'm beginning to think mine is bad in my 240U also... if it is, I'll take it off and take it to B&B Hydraulics locally where there are some old Cessna/Eaton hands working.

I have a parts catalog for the 240 tractors and the hydraulic pumps were made by two companies. One as noted earlier is made by Thompson while the other is made by Pesco. The main difference is the location of a check ball and spring. The IH part no. of the Thompson pump is 368633R91 while the Pesco pump is 368894R91 both of which might have been superseded since my catalog was printed in April 1960. The internal parts you are noting are not shown or identified as they are part of the vendor supplied pump assemblies. Either pump you can locate will interchange with the other as they are optional to get other. The front pump shaft oil seal is the same for both pumps and is p/n 353183R91. From your photo and the illustration in my part catalog I believe you have the Thompson model on your tractor and the IH service package for that pump is p/n 368634R91 and will consist of several parts mainly the noted oil seal, some O-rings, washers and a gasket. The gears and bearing you make note of are not listed in the catalog and as I stated are part of the vendor supplied pump assembly.
This most likely isn't much assistance to your immediate problem but might aid you if looking for another pump. To repair your existing pump will most likely require the services of a facility who specializes in such repairs and servicing of hydraulic system components, Hal.

Thanks for getting back so soon. Spent entire morning with Google Search looking at Pesco, Thompson, and Cessa/Eaton; using about six different parts numbers. There is not much out there regarding the pump parts. I also had no luck with the repair kit part number, which probably has been superseded at least three times now. Some good news in that I was playing with the "back end" (photo #1) and found a second part number stamped on the body: 368633R92, which one web site indicated was superseded by:376993R94. Didn't help me my search, though. I feel like I shall probably pursue the Speedi fix, but hope you guys will stick it out a little longer. I measured the diameter of the gear that fits through "front end", and it was 15.4mm from top to bottom. There was slight discoloration on the shaft, but no grooves or nicks. I tried to measure ID of the sleeve or bearing itself but it was in pretty bad shape. Best measure was was 16.7mm. IS THAT LEATHER, RUBBER, OR JUST BURNT OIL ON THE INSIDE OF THE METAL BEARING? See con't on reply to HAL.

HAL con't. Gear pockets look great. Hal, ur comment about spring and ball got me re-looking at the pump. New photos 4 and 5 show opposing ends of the short gear. There is a spring inside the shaft. One end shows the end of the spring where it is crimped to hold in place. last pix shows other end where you can see a spring. Just room enough for a small ball. Is that the item I dropped on the shop floor, and can't find now? Do u both think it would be best to drop off the front end and gear to a shop, and let them figure it out. Final question for now. How did 3 gallons of trans fluid get through that 1.3mm gap between the shaft and bushing? Am I missing something more important? Thanks again for both of your guys help. Will keep you posted after I find that damn little ball!

I spent a couple hours last evening as well and obtained a little more information. The 376993R94 has been replaced by 1949256C1 which is currently available from CaseIH at a cost of $985 per Messicks website. That being most likely out of the options to consider I also found the aftermarket Thompson pumps available in several places under one of the numbers you have or I provided above in the $500-$600 range if you are looking for a total new pump replacement. I'm sure a repair will be far less expensive and a very doable fix to your stated problem. I also found where used/salvage pumps have been on eBay within the past couple of years so keeping an eye there is an option as well, Hal.

The little ball is part no. 86624944 which replaced the original p/n 16011R1 along with 17011R1 which is nothing more then a 9/32" dia. chrome steel ball. It is currently still available per Messicks for $3.15 if you can't find one locally or your original. Also, I see in your photos that the gasket 350708R1 is somewhat comprised on one corner which Messicks lists for $4.17. The pressure plate spring with the two larger holes 361629R1 is likewise available for $6.15 there as well. And yet one more item you will probably be needing is the pump shaft oil seal 385038R91 which replaces the original p/n 353183R91 is available there as well for $14.05.
The spring and ball which I see in the diagram in my parts catalog installs under a plug which is located on the top of your pump assembly. I don't know it's function as I don't have anything that shows the inside of the pump assembly. I would assume it is a bypass or relief value but am not that schooled on the hydraulic system on a 240 as I've been fortunate with mine so far and haven't had to get educated. If you need a copy of the pump pages from my part catalog I can mail them through the USPS system as I don't know about all of this scanning and sending stuff you younger folks grew up doing. If a copy is desired my email is open and I would need a mailing address on where to send them, Hal.

About losing the fluid through that gap between the seal and shaft it doesn't take much of one to displace a lot of hydraulic fluid when it is under significant pressure which it mostly likely is in the pump. When the engine driven pump is working (engine on) the fluid has to go somewhere and if that was the path of least resistance you can bet it went there at a rapid rate. I agree if it was just parked a gap of that size would just amount to a few drops every hour most likely, Hal.

(quoted from post at 14:13:39 02/01/15) Thanks for getting back so soon. Spent entire morning with Google Search looking at Pesco, Thompson, and Cessa/Eaton; using about six different parts numbers. .

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Cessna never built pumps for any IH tractors before the 460/560 series as far as I know. Don't know that Eaton made any at all for them while it was still IH and don't know of any for Case IH, but may have. At the time Eaton bought Cessna, we had been testing a high pressure pump for IH, but after Case bought IH, it never went to production. It was a 10,000 psi piston pump and was it ever LOUD!! Not sure it would have ever worked out due to that. I worked in the Engineering Experimental lab at the time.
We built gear pumps similar to the Thompson and Pesco, but AFAIK, not for IH, but we may have. If we did, it was for something other than the 240. We built a ton of the 12 AND 17 gpm transmission mounted pumps for the 460/560... I know 'cause I changed out a 12 for a 17 one time at work.

(quoted from post at 13:43:52 02/01/15) About losing the fluid through that gap between the seal and shaft it doesn't take much of one to displace a lot of hydraulic fluid when it is under significant pressure which it mostly likely is in the pump. When the engine driven pump is working (engine on) the fluid has to go somewhere and if that was the path of least resistance you can bet it went there at a rapid rate. I agree if it was just parked a gap of that size would just amount to a few drops every hour most likely, Hal.

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HAL and IH Fan. Thanks again for the help. Sorry about the delay getting back. We had a medical emergency here that kept me busy the last couple of days. Everything will be back on track Wednesday afternoon. It was no big deal, now that it is over. Also, all is well. Hal. You misjudged my age. I am 20 years older than my old IH240 sweetheart that was born around 1960. See you tomorrow.

IH Fan. See my comments to HAL. Thanks for the assistance.

We're about the same age as I was a few months over 16 when my Farmall 240 was built in September 1958, Hal.

(quoted from post at 23:00:59 02/03/15) We're about the same age as I was a few months over 16 when my Farmall 240 was built in September 1958, Hal.

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My 240U is from '58 also, not sure what month, but we must be the same age, +/- a month or two.
lucky..., no recent emergencies here, but eye doc, dentist and cardiologist appointments all in the last week. Seems at this age, I get to see a lot of doctors.

(quoted from post at 21:00:59 02/03/15) We're about the same age as I was a few months over 16 when my Farmall 240 was built in September 1958, Hal.

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AL.I may be able to send good photos, but I'll be darn if I can figure out how to send you an email. I want to discuss a couple of items that the rest of the world doesn't need to know. I have generated an alias email address for myself. Could you please give me a shout at [email protected]. By the way, I am just a little down the interstate from you at Grand Lake, in NE Oklahoma. Thanks

HAL> I for sure want to take you up on your offer to send me a copy of the pump diagram and parts list. You may have these already, but I would be happy to send you a copy of anything I may have. I have original manuals: TRANSMISSION AND FINAL DRIVE:INSTALLATION INSTRUCTIONS FOR THREE-POINT FAST HITCH & TEL-A-DEPTH:OPERATORS MANUAL:MAINTENANCE MANUAL. I still can't figure out how to contact you on email or this site with a message. So, my address is:Bob Luckinbill, 25371 South 676 Road, Grove,OK. 74344. Thank you once again for providing all your assistance. I will keep you posted as soon as I start installing all the parts I have ordered from Messicks.

Bob, I'll be in town later today and will mail them from the Post Office and trust they'll arrive shortly. Good luck in the reassembly of your pump.
In order to reply with an email through this forum see down in the lower right corner of the post the words "Reply" and "Send Email". Just click on the "Send Email" link and a special screen will appear where you create and send your email message. Most posters don't open their email in which case it will show "No Email". Hope this helps for the next time, Hal.