B6100 front loader hydraulic pump

[Lil Foot]

There is nothing magic about the stock chain couplers or the splined hub that bolts to the crank pulley.
Just about any type of flex coupler bolted to the pulley, connected to a shaft to get under the radiator support, then connected to another flex coupling on the pump will work.
If my stock setup every gives up the ghost, I plan to machine some sort of flange to bolt to the pulley, and build the rest with off-the-shelf commercial parts.

 

[TheOldHokie]

From the B219 manual:
View attachment 155761

Two chain couplers - one on the pump and one on the tractor

What is the purpose of the case the pump is mounted to? Seems like overkill for just a loader pump.

Dan

 

[Lil Foot]

It's kind of a guard to protect the pump, you're right, seems like overkill, unless you are using the front of the tractor to head butt large rams or tree trunks.

 

[TheOldHokie]

It's kind of a guard to protect the pump, you're right, seems like overkill, unless you are using the front of the tractor to head butt large rams or tree trunks.
View attachment 155765 View attachment 155766

Thanks. Thats nothing like what I was envisioning from the image in the manual. Looks very reasonable to me. That shaft drive should be very easy to duplicate using off the shelf components.

Dan

 

[Swede1962]

I suspect your gear is actually a chain sprocket which is one half of a chain coupler. The other half of the coupler goes on the end of the tractor side shaft and a double row chain is wrapped around them to join the two shafts. An inexpensive standard part.

The hub in the parts diagram I posted fits over the nut for the crankshaft pulley and bolts to the face of the pulley.

My suggestion is have your machinist make a custom hub with a standard keyed bore for the crankshaft. From there out you can use off the shelf shafting to connect the hub to your pump. Easy for the machinist and you.

Dan

This is what I have. Hilarious that is has the Cessna logo on it since I'm actually an A&P mechanic.

 

[TheOldHokie]

This is what I have. Hilarious that is has the Cessna logo on it since I'm actually an A&P mechanic.

The splined shaft on the tractor is part of the crankshaft. You have plenty of clearance. A machinist can easily make an adapter with PLAIN BORE to slide OVER the splines and BOLT to the pulley.
Everything from there out can be purchased off the shelf. No need to make this complicated.

Dan

 

[Swede1962]

It's kind of a guard to protect the pump, you're right, seems like overkill, unless you are using the front of the tractor to head butt large rams or tree trunks.
View attachment 155765 View attachment 155766

Outstanding!! You have made my day with these photos! Yes, all the mystery is gone. The supports coming from the rear masts are heavier than I had seen before, but thats not a bad thing at all. Did you extend the frame nose at all? This looks like the same thing I have on mine frame wise.

 

[Swede1962]

The splined shaft on the tractor is part of the crankshaft. You have plenty of clearance. A machinist can easily make an adapter with PLAIN BORE to slide OVER the splines and BOLT to the pulley.
Everything from there out can be purchased off the shelf. No need to make this complicated.

Dan

Agreed! My whole month just got better!!

 

[ken erickson]

This is what I have. Hilarious that is has the Cessna logo on it since I'm actually an A&P mechanic.

Cessna must have had their hands in a fair amount of hydraulic components.
The red arrow points to the hydraulic boom swing rotary cylinder on this Massy Ferguson backhoe tractor, made by Cessna with the Cessna logo also on it. Roughly the size of a 3 gallon round container.

 

[Swede1962]

Cessna must have had their hands in a fair amount of hydraulic components.
The red arrow points to the hydraulic boom swing rotary cylinder on this Massy Ferguson backhoe tractor, made by Cessna with the Cessna logo also on it. Roughly the size of a 3 gallon round container.


View attachment 155777

You know typically having that logo increases the price by 4 fold! You have expensive tastes and didn't know it! Lol!

 

[ken erickson]

You know typically having that logo increases the price by 4 fold! You have expensive tastes and didn't know it! Lol!

Not me! LOL, I only helped two friends get together on this tractor. I discovered the Cessna connection when I first did my research on the tractor and boom cylinder. Many videos on rebuilding these cylinders, I guess due to the fact they are obsolete now. There is even a set of plans floating around on the net to convert these older machines that used this type rotary cylinder to push pull dual cylinders like most modern backhoes use.

 

[Lil Foot]

This is what I have. Hilarious that is has the Cessna logo on it since I'm actually an A&P mechanic.

Looks like the same Cessna pump I have.

 

[Lil Foot]

Outstanding!! You have made my day with these photos! Yes, all the mystery is gone. The supports coming from the rear masts are heavier than I had seen before, but thats not a bad thing at all. Did you extend the frame nose at all? This looks like the same thing I have on mine frame wise.

Nope, mine is all factory B219 setup.
(I have seen 4, just like this)

 

[TheOldHokie]

You know typically having that logo increases the price by 4 fold! You have expensive tastes and didn't know it! Lol!

Now that Cessna has beem assimilated by Parker that multiplier is probably larger.

Dan

 

[Lil Foot]

The original 2 spool valve is Cessna also.

 

[Russell King]

The splined shaft on the tractor is part of the crankshaft. You have plenty of clearance. A machinist can easily make an adapter with PLAIN BORE to slide OVER the splines and BOLT to the pulley.
Everything from there out can be purchased off the shelf. No need to make this complicated.

Dan

@TheOldHokie
Looking at the drawing you had made in the other post, I see the torque into the shaft (from the tractor) is through the bolts and any friction that is between the parts. I don’t see any keyways or set screws on the splined shaft. I am curious how much HP these pumps will require and if that is published data in the pump specifications.

I think I would want to get a keyway in the new shaft and use one of the splines as the driver shaft keyway. I would hand grind the key to fit since I have no idea what that profile is. I assume you think that is NOT required and it probably is not needed, but I just like keys to transmit torque.

Would you please comment on how much HP will be required by the pump?

 

[Lil Foot]

I have seen these chain couplers keyed to the shaft, welded to the shaft, and both keyed & welded.
Mine (original I'm sure) is keyed & set screwed.

 

[TheOldHokie]

@TheOldHokie
Looking at the drawing you had made in the other post, I see the torque into the shaft (from the tractor) is through the bolts and any friction that is between the parts. I don’t see any keyways or set screws on the splined shaft. I am curious how much HP these pumps will require and if that is published data in the pump specifications.

I think I would want to get a keyway in the new shaft and use one of the splines as the driver shaft keyway. I would hand grind the key to fit since I have no idea what that profile is. I assume you think that is NOT required and it probably is not needed, but I just like keys to transmit torque.

Would you please comment on how much HP will be required by the pump?

In this case you are looking at maybe 10 HP max and depending on the pump likely half that.

Tractors have used crankshaft pulley bolts for this purpose for 75+ years. I have built dozens that can sink 20HP and are driven with 4 x 1/4" bolts. See the belt drive picture I posted earlier.

Dan

 

[TheOldHokie]

I have seen these chain couplers keyed to the shaft, welded to the shaft, and both keyed & welded.
Mine (original I'm sure) is keyed & set screwed.

And all the setscrew does is retain the coupler and key in position on the shaft. It transmits no torque.

Dan