Hi & Welcome to our listing for a Genuine Numatic Swing Arm Bracket Painted. This part is known as 429133.

 

If the blade on your Numatic 1840 is not touching the floor all the time or wont swing side to side, then your swing could be the issue. We recommend you remove the swing arm and check to see if the arm is damaged or bent.

 

This is a Genuine Numatic Part.

 

This will fit the following models:

 

TT1840, TT1840G, TTB1840, TTB1840G, TTB1840NX

 

 

If you have any questions then please feel free to contact us using the contact seller link above.