Questions on D100 backhoe

[JSinMO]

Wow! Can’t wait to see it!

[Spike188]

Based on color, the 644 is a 1976. It has the 12" rims and heavy webbed trans axle. I would swap rear ends and hoe over to the 648. The under carriage from the 644 will be a bolt on transfer to the 648. I think the 644 will have 1" plate counter weights. If so the carriage made need modification for the cast weights to fit.

Welcome to the bh club.

[Merchlewitz]

Based on color, the 644 is a 1976. It has the 12" rims and heavy webbed trans axle. I would swap rear ends and hoe over to the 648. The under carriage from the 644 will be a bolt on transfer to the 648. I think the 644 will have 1" plate counter weights. If so the carriage made need modification for the cast weights to fit.

Welcome to the bh club.

Spike appreciate all the info.. if the weights already work on the 644 should I just use those and I don’t have to modified anything then? Or is the Cast iron weight better weight? Does one way more than the other?


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[Spike188]

The parts book shows the cast weights under a different part number for the 648. The only difference I can think of between the 644/646 and the 648 is power steering. I have modified a 1974 646 frame to accept a backhoe undercarriage from a 1975 646. 1975 was the year backhoes were introduced. The only modification required was drilling 2 holes for carriage mounts. One of those holes is where the 648 power steering cylinder mounts.

It will be interesting to see if there will need to be modifications to the carriage during the switch.

[Merchlewitz]

The parts book shows the cast weights under a different part number for the 648. The only difference I can think of between the 644/646 and the 648 is power steering. I have modified a 1974 646 frame to accept a backhoe undercarriage from a 1975 646. 1975 was the year backhoes were introduced. The only modification required was drilling 2 holes for carriage mounts. One of those holes is where the 648 power steering cylinder mounts.

It will be interesting to see if there will aby modifications to the carriage during the switch.

Ah yes… we shall see..


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[Harry]

Merchlewitz if you do purchase the 644 that would be great. If I were you I would put the 644 to work and see how it performs to evaluate it. You can always use the 648 as a loader to move material, that’s where the power steering will be nice to have. I’ve found on my 644 lbh, the hoe counter balances nicely for traction and helps in steering also. With your luck in finding GT’s you might just bump into a 7020. Harry

[Merchlewitz]

Merchlewitz if you do purchase the 644 that would be great. If I were you I would put the 644 to work and see how it performs to evaluate it. You can always use the 648 as a loader to move material, that’s where the power steering will be nice to have. I’ve found on my 644 lbh, the hoe counter balances nicely for traction and helps in steering also. With your luck in finding GT’s you might just bump into a 7020. Harry

Haha that does sound tempting… I am limited on space and already told the wife I’d be making one unit out of both and selling the rest… so tempting….


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[Harry]

I have so many, my doesn’t know how many I have. I always tell her it’s my hobby and it keeps me busy, sometimes to busy. One 600 to dig material and another 600 to move it. Works for me! Harry

[Merchlewitz]

This is very interesting, It looks like there’s foot pedals to lift and lower the down riggers maybe is this custom?








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[Eugen]

Looks like its was repowered. That engine is 2 cylinders. Doesn't look too bad, but I can see needing some work. Any hydraulic leaks?