Just bought an old Sunnen LBN. What spindle lube?

[Garwood]

Just picked up an LBN with a load of mandrels, stones and truing sleeves. Before I try it out, What oil do I need to put in the spindle oil cups? It doesn't seem to say anything on it and if I google Sunnen and oil with any other words, it doesn't matter. I just get honing fluid.

 

[Garwood]

It runs fine on DTE light. It would probably run on anything. Just figured I'd ask in case it was supposed to have kerosene or something crazy.

 

[eKretz]

Yeah probably whatever you've got that's a decent light oil. I don't remember exactly what we put in the one we had.

 

[gappmast]

Back in the day it was built for automotive engine rebuilding. 30W was king that is what it takes. Non Detergent, that was all they had back them

 

[Garwood]

DTE light would be ISO 32 or SAE 10. Maybe lighter than ideal. My compressors run on ISO 100/ SAE 30. I'll use that from now on.

 

[Garwood]

The honing fluid pump on this guy is belt driven and it doesn't pump. Are these pumps serviceable?

 

[gappmast]

The honing fluid pump on this guy is belt driven and it doesn't pump. Are these pumps serviceable?

It is a centrifugal pump not much to go wrong. The shaft should have a few thousands clearance if it is more you will have to bore it out and sleeve it. Other than that make sure the pickup screen is clean I have seen them plugged with lint from rags and make sure the belt is not slipping. There should be a knurled knob under the work tray that controls the volume make sure it isn't turned off

 

[Dan from Oakland]

Or the tank and pump is full of sediment that has never ever been cleaned.

 

[gappmast]

Or the tank and pump is full of sediment that has never ever been cleaned.

Seen that happen also