My PS is out. The pump seems to be fine so I'm left with booster. Anyone have insights into issue? I have workshop manual and there is nothing on PS trouble shooting....thanks in advance
M4000 Power Steering
- Thread starter chico_513
- Start date
How are you able to say the pump is fine?
The "booster" will have an internal piston which can exert a force IN or OUT. If the seal on the booster piston is leaking, you will have no boost but also no external oil leak.
Dave
The "booster" will have an internal piston which can exert a force IN or OUT. If the seal on the booster piston is leaking, you will have no boost but also no external oil leak.
Dave
I removed pump and the PS rotates with implement pump. I replaced both maybe 10 years ago for similar issue and the input shaft on the PS was worn to point there was no engagement with the implement pump. BUT, I just disassembled pumps and see that the cavity between the two is filled with oil. I assume the shaft seal has failed and allows fluid to circulate in pump....Now where to find a seal kit. The replacement pump assy is over $1600
Perhaps you might have more luck with parts if you could figure out if your tractor is really a true Kubota.
For example, the M30 models such as M4030/M5030/M6030/M7030/M8030 were built under some license from FIAT and bear a strong resemblance to tractors sold by WHITE ( Cochshutt) and Allis-Chalmers.
As such they are completely different than any other Kubota.
Kubota wanted to sell a larger tractors so did this rather than design their own.
Currently Kubota is doing the same thing with their M7 & M8 which are really FENDT. machines.
Often it is the wrecking yards who have a handle on which brands parts will fit other manufacturer's products. Kubota is not alone in this re-branding practice.
Dave
For example, the M30 models such as M4030/M5030/M6030/M7030/M8030 were built under some license from FIAT and bear a strong resemblance to tractors sold by WHITE ( Cochshutt) and Allis-Chalmers.
As such they are completely different than any other Kubota.
Kubota wanted to sell a larger tractors so did this rather than design their own.
Currently Kubota is doing the same thing with their M7 & M8 which are really FENDT. machines.
Often it is the wrecking yards who have a handle on which brands parts will fit other manufacturer's products. Kubota is not alone in this re-branding practice.
Dave
It is a 1981 Kubota M4000, S/N 11913, I have all operators manual, parts list (english/japanese), workshop manual. I bought it in 1994 with 2000hrs on it and have put almost 1000 hours since then. It has a Bushhog QT 2400 FEL and oversize tires front and rear. It's been a pretty good tractor for my purposes absent finding parts for a now 40 year old. I've contacted local dealer inquiring about a seal kit and have not gotten no response. I was able to purchase a seal kit for implement pump 15-20 years ago from dealer. I will see if the local hydraulic repair shop can help. I have gotten cylinder seals from him in past.
whitetiger
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Staff member
Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
The M7 is totally a Kubota tractor, built in the Bierne, Dunkerque precinct Nord department, France.
The M8 is built for Kubota in a joint venture by Buhler Versatile Industries in Winnipeg, Canada. Buhler with sell basically the same tractor painted red and yellow. The M8 was designed by Kubota and Buhler working together. I am not sure if Buhler had any input on the design of the M7 unit.
The future will most likely be that the Kubota engine will replace the Cummins engine and in the end, Kubota will acquire Buhler Versatile Industries.
It was my dealer ( some time back) who informed me of the FENDT connection. This was likely during the time the inter company arrangements were being finalized and Whitetiger's comments represent the final chapter.
When you say the M7 is totally Kubota, do you mean from the design concept, preliminary and final engineering?
It seems today most vehicle manufacturers, (cars, trucks, motorcycles) are buying components from other manufacturers to save on development time and costs. The latest Toyota Supra has a BMW power train.
The new Supra has a significant number of BMW-stamped parts. The inline-six engine, for example, is sourced from BMW — although Toyota's engineers tuned it specifically for the Supra. The eight-speed automatic transmission is also from BMW, and the chassis is the same one found in the Z4.
The Fiat 124 Spider (Type 348) is a front-engine, rear-drive, two-passenger roadster manufactured by Mazda for FCA,
My 2006 Pontiac Vibe is a re-badged Toyota Matrix built in the California NUMMI Plant that now builds Tesla's
The Pontiac Vibe is a compact car that was sold by Pontiac from 2002 to 2010. It was jointly developed by General Motors along with Toyota, who manufactures the mechanically similar Toyota Matrix. Manufactured by the Toyota-GM joint venture NUMMI in Fremont, California, the Vibe succeeded the Chevrolet Prizm in production at NUMMI and like the Prizm, it was derived from the Toyota Corolla, making it the last of the GM and Toyota developed S-body cars.
Dave
whitetiger
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Staff member
Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
The M7 is using the Kubota V6108 engine with either a Kubota 30 speed semi power shift (54 speeds with the creep option) or Kubota CVT transmission (KVT) depending on the model. The tractor is built totally by Kubota in a new Kubota facility in France. I can not find any reference to any design or engineering assistance. It was being produced before the Buhler Versatile connection was reached.
I seriously doubt Fendt had any input into any Kubota design as they have been owned by AGCO since 1997.
We do not have an M7 or M8 contract, so we do not sell them or get training on them. I did get to see them at the Edgerton Kansas facility the last two times I was there.
I seriously doubt Fendt had any input into any Kubota design as they have been owned by AGCO since 1997.
We do not have an M7 or M8 contract, so we do not sell them or get training on them. I did get to see them at the Edgerton Kansas facility the last two times I was there.
Establishing a production center for an upland farming tractor in Europe | News 2013 | Kubota Global Site
News release from Kubota Corporation
www.kubota.com
The M7 transmission is built by ZF. The same company that builds the transmissions for Fendt and a few other companies. The engine is Kubota alright and the tractor is assembled in France. There are very few parts available from Kubota for the M7 transaxle. If one fails you either buy a new one for north of $100000 or a remanufactured transaxle. I'm nearly certain the M8 and Buhler Versatile tractors use the ZF transaxle as well.The M7 is using the Kubota V6108 engine with either a Kubota 30 speed semi power shift (54 speeds with the creep option) or Kubota CVT transmission (KVT) depending on the model. The tractor is built totally by Kubota in a new Kubota facility in France. I can not find any reference to any design or engineering assistance. It was being produced before the Buhler Versatile connection was reached.
I seriously doubt Fendt had any input into any Kubota design as they have been owned by AGCO since 1997.
We do not have an M7 or M8 contract, so we do not sell them or get training on them. I did get to see them at the Edgerton Kansas facility the last two times I was there.
Establishing a production center for an upland farming tractor in Europe | News 2013 | Kubota Global Site
News release from Kubota Corporationwww.kubota.com
https://www.zf.com/products/en/agriculture/productfinder/tractor/tractor_productfinder.html
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whitetiger
Moderator
Staff member
Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
I finally found a picture in the WSM that shows ZF on the side of the M7 transmission and no part numbers for the transmission. All of the rear axle parts have part numbers as do the PTO parts. I also found a diagnostics sheet for the transmission, and at the bottom, it states that no disassembly of the transmission is allowed unless specified by Kubota. Most failures will be an R&R with the trans being shipped back to the manufacture.
Yes, the M8 and Buhler Versatile use a complete ZF transaxle, Cummins engine, and I'm not sure whose front axle. There are very few part numbers for any transaxle parts on an M8.
We had lots of problems with the PTO on the early M7's I have been retired for 3 years now so hopefully the problems are all in the past. I'm certainly not sorry that I don't have to work on M7's anymore! I miss the M6's and all the other M series though!