What's new
What's new

South Bend Single Tumblr gearbox

Bellaru433

Aluminum
Joined
Jun 8, 2017
I recently just rebuild a 1947 heavy 10 and now that I’m giving it a test run with the gearbox engaged without the chuck on the spindle things seem to run smooth but once I put the three jaw chuck on everything bogs down to barely spinning.. I have the proper bearing clearance and am able to spin the spindle by hand but with the weight of the chuck on there and engaging the gearbox everything slows down and practically doesn’t move at all..
I’m just lost.. There’s something about having that weight of that chuck on there that slows everything down.. it seems when the single Tumblr gearbox is in the far left position nothing wants to move freely anymore..
 
Last edited:

Tony Quiring

Titanium
Joined
Nov 5, 2008
Location
Madera county california usa
The gearbox has 3 range shift by the top lever.

When to left a gear is not moving.

Best to remove and work on inverted on your bench.

If you have the manual review the assembly. You my have a gear in wrong place.

Sent from my SM-G781V using Tapatalk
 

FredC

Titanium
Joined
Oct 29, 2010
Location
Dewees Texas
You may get the answer here as many people with South Bend experience hang out here also. But the next section down is specific machines. South Bend is near the bottom in that section. Sometimes the moderators will move a thread to a better place. Usually a temporary notice is posted that the thread was moved.

Maybe Tony already nailed it. My South Bend has change gears so I am no help.
 

Bellaru433

Aluminum
Joined
Jun 8, 2017
Thank you sir.. I was looking for a South Bend section but couldn’t seem to find one.. that’s why I just ended up choosing general.. 👍
 

Bellaru433

Aluminum
Joined
Jun 8, 2017
Yeah you’re right just pull it off and get back in there and see what’s going on.. thank You..
 








 
Top