What is this bleeder for?

[whatsupdoc]

What is item 170 Bleeder for? This is for a L3302.
No issues just curious.

 

[MOOTS]

So you don’t overfill the front axle pivot.

 

[whatsupdoc]

Ok, like a grease relief valve.

 

[North Idaho Wolfman]

Ok, like a grease relief valve.

Yes exactly