Power Steering control unit -DK 35

[dadannyboy]

Hey Folks, I have a 2002 DK-35 and started experiencing hydraulic fluid leaking down the steering column. I pulled the column and it appears that the fluid is coming from around the gears of the steering control unit. I have been searching the forums for a rebuilt kit for the steering unit as I can't afford $1500 that a replacement would cost from a dealer. I have emailed several hydraulic shops and they are giving me estimates of $500 to rebuild and $750 plus to replace.

Has anybody rebuilt the power steering control unit and can provide the rebuild parts info or has anyone replaced the pump with something similar. I know enough about hydraulics to know that I can't throw any old pump on to replace.

The pump has a tag that states - Sumitomo, Eaton - Orbitrol power steering pump(model RW051B120R6A) off a 2002 Kioti DK 35.
Thanks Dan

 

[xcgreene]

Eaton is a big name, find a sales or info email for them online, ask for a parts diagram referencing that model number. It may take some time to get directed around, but you'll often get your answer. They don't necessarily need to know that this is out of a tractor, they just need to know the pump model and serial number, and often a picture of the nameplate. They make pumps and other components for an enormous range of equipment offshore.

Just keep the email very short and only the information required.

 

[dadannyboy]

Thanks xcgreene, Email sent to Eaton. Was hoping that someone has had some experience with this part. I have inquired at several hydraulic shop that advertise to the agricultural industry. A few of the shops have had inquires about this part number. One guy said that he gets several requests per month for this part number but has never worked on one. Hope Eaton comes through.

 

[xcgreene]

You could be pioneering some good info for people on here with your first few posts. I've seen a few about the steering motors in the past, but I don't think I've seen a part number break down from eaton yet. Maybe you'll get lucky and hear word before the weekend.

 

[ptsg]

Worst case scenario, you might have to take all the seals out and buy it individually at a hydraulic shop.

It will use a couple O-ring and maybe a shaft seals where the steering connects to.

 

[dadannyboy]

I received an Email response back from Eaton that stated i needed to contact my local distributor. I looked up closest distributor via their web site and gave them a call. They laughed at me and told me to call Eaton Hydraulic Technical support and supplied me the number. I talked to a Tech named Tony, who stated that he had received several questions on that particular part number. He told me that this pump was metric and that all Eaton USA pumps were SAE and parts would not fit a Japanese model. He took my contact info and said he would reach out to their Japan division to attempt to get info. We will see what i get back

 

[xcgreene]

I received an Email response back from Eaton that stated i needed to contact my local distributor. I looked up closest distributor via their web site and gave them a call. They laughed at me and told me to call Eaton Hydraulic Technical support and supplied me the number. I talked to a Tech named Tony, who stated that he had received several questions on that particular part number. He told me that this pump was metric and that all Eaton USA pumps were SAE and parts would not fit a Japanese model. He took my contact info and said he would reach out to their Japan division to attempt to get info. We will see what i get back

Looks like your being directed around ok. this sort of thing takes time but it often works if you keep at it in a friendly way. You could also try Eaton Japan directly through here Contact Form (Eaton Industries (Japan) Ltd.)

 

[dadannyboy]

Just received an Email back from Eaton Japan and stated that they could not help me and i would have to work with the manufacture to solve any issues. So i am back to square one. $1600 for a power steering motor from Koiti. Not sure the tractors worth that.

Anyone have any recommendations on a reasonable and honest hydraulic shop. The reviews on the shops in my area are not good especially if you are not a normal customer.
Thank in advance.

 

[xcgreene]

Just received an Email back from Eaton Japan and stated that they could not help me and i would have to work with the manufacture to solve any issues. So i am back to square one. $1600 for a power steering motor from Koiti. Not sure the tractors worth that.

Anyone have any recommendations on a reasonable and honest hydraulic shop. The reviews on the shops in my area are not good especially if you are not a normal customer.
Thank in advance.

If you are looking to retrofit, lots of folks like motion industires Hydraulics - Motion Industries

 

[ptsg]

Can't you just take the seals out and buy the seals individually? It will most likely be cheaper than actual seal kit.

 

[xcgreene]

Just received an Email back from Eaton Japan and stated that they could not help me and i would have to work with the manufacture to solve any issues. So i am back to square one. $1600 for a power steering motor from Koiti. Not sure the tractors worth that.

Anyone have any recommendations on a reasonable and honest hydraulic shop. The reviews on the shops in my area are not good especially if you are not a normal customer.
Thank in advance.

I gave the EATON Japan email a try as well. I was told "Please contact to the machine manufacture's aftermarket support. Actually the steering valve is too old an already obsolete. We do not have any kind of rebuild kit."

Worth a try. At this point ptsg's recommendation, I think, is the best next route to go. Take the motor apart, measure up the seals and purchased them that way. If that doesn't work, a retrofit of a similar motor could also work out fine, seeing as how a motor like this would typically be about $200.

 

[dadannyboy]

XCGREEN - i am open to a retrofit but can't find the technical specs of the current pump that i could match to a retro fit. Any idea of how to match.

 

[dadannyboy]

PTSG, i have tried to source a good local hydraulic shop, most of the local shops get really poor ratings especially for a non-business customer. I am an engineer by training and am willing to pull the pump apart as it looks pretty straight forward from what i have seen on youtube. Any idea where i could source the seals. thanks

 

[xcgreene]

XCGREEN - i am open to a retrofit but can't find the technical specs of the current pump that i could match to a retro fit. Any idea of how to match.

Dadannyboy, I can offer up this page. This is the same system the newer dk35, 40, 45, 50se tractors use. I would imagine its very similar to what you have in the older dk tracor. This should definitely get you in the ballpark on flow rates and pressures.

 

[100 td]

PTSG, i have tried to source a good local hydraulic shop, most of the local shops get really poor ratings especially for a non-business customer. I am an engineer by training and am willing to pull the pump apart as it looks pretty straight forward from what i have seen on youtube. Any idea where i could source the seals. thanks

How did you go with this, I have a 2003 service manual/parts manual in pdf for it if you want it, I source seals from the internet, ebay etc, or online hydraulic shops
Unfortunately the parts list file doesn't go into a breakdown of the guts of the steering controller, so it appears Kioti don't sell the individual seals etc.
Steering flow is 4.7 gpm from the specs

 

[dadannyboy]

Update. I ended up going to several hydraulic shops to try to obtain the parts to rebuild the unit with no luck. I finally found a local shop that had dealt foreign tractor parts. He ended up rebuilding it for $400 which included a year warranty. Works great so far.

 

[xcgreene]

Update. I ended up going to several hydraulic shops to try to obtain the parts to rebuild the unit with no luck. I finally found a local shop that had dealt foreign tractor parts. He ended up rebuilding it for $400 which included a year warranty. Works great so far.

Not too bad at all considering. Good to know the parts are available somewhere. Any chance of getting the part numbers the shop used? Would be very useful.

 

[Pepacton]

Hey Folks, I have a 2002 DK-35 and started experiencing hydraulic fluid leaking down the steering column. I pulled the column and it appears that the fluid is coming from around the gears of the steering control unit. I have been searching the forums for a rebuilt kit for the steering unit as I can't afford $1500 that a replacement would cost from a dealer. I have emailed several hydraulic shops and they are giving me estimates of $500 to rebuild and $750 plus to replace.

Has anybody rebuilt the power steering control unit and can provide the rebuild parts info or has anyone replaced the pump with something similar. I know enough about hydraulics to know that I can't throw any old pump on to replace.

The pump has a tag that states - Sumitomo, Eaton - Orbitrol power steering pump(model RW051B120R6A) off a 2002 Kioti DK 35.
Thanks Dan

I am having the exact same problem now were you able to solve the issue? My name is mark

 

[Pepacton]

Update. I ended up going to several hydraulic shops to try to obtain the parts to rebuild the unit with no luck. I finally found a local shop that had dealt foreign tractor parts. He ended up rebuilding it for $400 which included a year warranty. Works great so far.

I am dealing with the same issue now in 2024. Can you help me as far as who you used to rebuild? Thank you very much. I have the same Tractor or Marklashway@gmail.com.