On the GS1500, the following parts occassionally requirement (depending on use, care and age) are:

Lid Assembly Replacement Parts

Refer to the drawing below for part identification:

Commonly replaced Seals and Gaskets on the GS1500:

• RTV "L" Lid Seal Kit - Order No. 0838194 (Note: 1 kit required to replace the seal on a GS1500 mixer)
  
• GS1500 Gasket - Order No. 0830934 (Note: 2 required to replace both units on a GS1500)
  
• Pneumatic Shock - Order No. 111663 (Note: 2 required to replace both units on a GS1500)