Need cylinder info on Prairie Dog Digger Backhoe

[Bill1303]

I have a 7 1/2' ML112 Prairie Dog Digger Backhoe and I sent off the main boom cylinder (the one nearest the seat) for repair and the shop I sent it to went out of business. So, now I need the relevant info to order a replacement cylinder. Does anyone have one of these so you can send me the hydraulic cylinder info (bore x stroke, rod diameter, retracted length, extended length, pin diameter)? I have had ZERO luck finding any parts or schematics info online. Thanks!

 

[dfkrug]

I don't know what "ML112" means. There was the early model and the later one. The
later had 30mm instead of 25mm pins in most of the pivots.

What I would do is buy a cyl that is close in size and adapt it. The cyls are metric,
and anything of approx. the right length, with about 2.75-3" ID and 30mm rods
can be adapted. I could give you the exact ID, but I can't look up that file right now.

 

[Leejohn]

What is wrong with the cyl. now? Can't you use the old cyl. to get all the info?

 

[Bill1303]

We were not able to get the original cylinder back when shop that had it closed down without warning. The ML 112 was incorrect, I had 2 sets of info together on the paper, sorry.

 

[dfkrug]

Also, the dipper cylinder and boom cyls are the same size. They are about 24" closed length.

Be careful about buying a substitute that is too large in OD. This will cause clearance issues
with the hose and the inside wall of the boom. You COULD buy a 3" OD cyl and put it on the
dipper, and moving the dipper cyl to the boom.

I used to be able to buy new Prairie Dog cyls, but I think they are out of stock now at
the importer. You could ask them. Steiner Tractor in Lennon, MI. Don't forget to tell them your
pin size.