Fan Belt Replace With Frt Mt Hyd Pump - B7100

[NMC_EXP]

Up front disclaimer: I am not a gear head. My unofficial motto is "If it ain't broke, fix it until it is."

Need to replace the fan belt on a 1980 B7100, gear drive trans, 3 point, with Kubota end loader.

The hydraulic pump mounts on the front and is driven by a shaft on the drive pulley. On either end of the shaft is a double section of roller chain. I have no idea what these chain sections are for.

I have the B7100 owners manual and parts manual and the manual for the loader. There is zero info on a front mounted pump.

Question: Can I disconnect and drop the shaft between the pulley and pump by splitting the roller chains?

OR do I have to disconnect the lines from the pump and drop the pump?

I found an old thread by a guy with the same problem. One member recommended using a link type belt but no other "fix".

You help will be desperately appreciated.

Regards

Jim

 

[freewheel3]

Yes the chains can be split. There should be a master link on each one. They aren't fun due to the tight work area, especially if they're rusty. Option 2 is to drop the pump but then you still have to get the sprocket off the pump input shaft. Option 3 is you might be able to disconnect all pump lines and mounting bolts, leave the pump in place and then try fishing the belt over the whole assy from the front. (Last resort). The chains are there to provide a semi flexible drive coupling between the engine and the pump.

 

[NMC_EXP]

Yes the chains can be split. There should be a master link on each one. They aren't fun due to the tight work area, especially if they're rusty. Option 2 is to drop the pump but then you still have to get the sprocket off the pump input shaft. Option 3 is you might be able to disconnect all pump lines and mounting bolts, leave the pump in place and then try fishing the belt over the whole assy from the front. (Last resort). The chains are there to provide a semi flexible drive coupling between the engine and the pump.

freewheel3

Thanks for the reply.

I proceeded blind before your reply. I split the front chain. There was barely enough room to pull the master pin. Also had to loosen the pump bracket mount bolts and pull it forward against the pump guard. This left just enough space between the pump sprocket and the sprocket on the front end of the drive shaft to snake the belt through.

I would recommend buying a new chain for this job. This one was petrified and would not reinstall until I worked every joint loose.

Had a time getting the pin back through the center links. Finally cut the points off two 8 penny nails and ran them through from the opposite side to hold the alignment. Pried on the pin from the front - it popped through and pushed the nails out.

Thanks again and best regards

Jim