B7200 Hydraulic Loader Cylinder repair

[avpowerstn]

Ok I have a seal kit for a B7200 HST-D loader (B1630),I have torn down the Lift Cylinder, but I am not sure , what goes where.My main question is "on the piston #1 there is a carbon ? ring, do I replace it with the yellow ring #2 (rigid) or the two piston rings #3. any help would be appreciated. Thanks Jim

 

[cmustang]

When I replace things like that i take them appart in order they come apart then match them to the new parts.

 

[avpowerstn]

When I replace things like that i take them appart in order they come apart then match them to the new parts.

I have not taken it apart yet, that is the gland (I think) and the piston.
all the old seals are still on, or inside the parts. The seals shown, are parts in the new seal kit. The yellow seal, or gasket, or ring, on the piston is what has me baffled.

#2 in the picture, seems to be the replacement for the
part on the piston (#1). The OD & ID seem the same, but it will not slide over the piston (too small)

But part #3 is a set of piston rings (2)

Thank You for the input

Jim

 

[Stubbyie]

Try using a parts schematic and matching part numbers.
See KubotaBooksOnLine.Com and now Kubota has their parts manuals online too.

 

[MagKarl]

I feel your pain and frustration. I had to swap out my dipper stick cylinder seals on my backhoe on my job site. It was winter and I had limited tools. Some of those parts were not exact matches for color either. Best I can offer is to study the parts carefully and think about their function. Replace with matching shape, size, and stiffness. I suspect parts are tweaked over time when it is discovered that another material might give better performance or lower cost to Kubota. It is remarkable that some of these parts can be assembled when they appear to be much too rigid and feel like they are going to break just getting them on. If I had been at home I would have tried warming some of them in hot water to see if that softened them up.

 

[avpowerstn]

Yes it was about $80.00 plus shipping for the seal kit. I would take a chance, if the kit was a little lower priced. Like you said, I am going to study the seals and see if I can figure it out. I am also running an add (adds) on Craigslist, I might get some help there. Thank You both for your input, it is
greatly appreciated.

 

[avpowerstn]

Well Craigslist panned out. I ran an add in the wanted section, and within
an hour, a gentleman called me, and said he was currently not working, and that he was employed, in the hydraulic repair industry, for the past 4 years.
He did the repairs, and let me video tape the repair work (the yellow ring was a piston ring, with an O-ring underneath it !!) he gave me all kinds of advice, and tips while performing the repairs. I would like to Thank everyone for their input.

 

[MagKarl]

Good for you. I'm glad you got it back together.

 

[Kytim]

Have you got somewhere to post the video like photobucket so others going through that could be directed to it for review. I don't know that it would be proper to upload to youtube because of privacy issues unless the gentleman gave you permission. might be a good resource for OTT users.

 

[avpowerstn]

Have you got somewhere to post the video like photobucket so others going through that could be directed to it for review. I don't know that it would be proper to upload to youtube because of privacy issues unless the gentleman gave you permission. might be a good resource for OTT users.

He said I could post the video, but I do have a few pictures as notes.
Maybe these will work

opps 5 max is the upload limit, this will be in parts, Part1

 

[avpowerstn]

part 2 (Part 2 of 5)

 

[avpowerstn]

part 3 of 5

 

[avpowerstn]

part 4 of 5

 

[avpowerstn]

part 5 of 5

 

[avpowerstn]

Part 1 of 5 - Hydraulic Lift cylinder rebuild instructions, for a B1630 Loader
on a Kubota B7200 HST-D (1984)

 

[4rider]

avpowerstn,

THANK YOU for putting together and posting this B1630 loader cylinder rebuild procedure!
Love the pictures and comments on them! I would rather see then read printed instructions.

 

[olthumpa]

Thanks for posting all those pics.

 

[navspecwar]

Avpowerstn, thanks for taking the time to put all this info together. I am sure you have or will help countless people with your post! Thanks, Chad

 

[avpowerstn]

It is my pleasure, to contribute to this awesome site... OTT Rocks!!

 

[85Hokie]

Part 1 of 5 - Hydraulic Lift cylinder rebuild instructions, for a B1630 Loader
on a Kubota B7200 HST-D (1984)

excellent job - hands of a surgeon !