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How to Replace the Tip Ejector Mechanism on a Sartorius mLINE Single Channel Pipette

Replace a mLINE Tip Ejector:

Step 1 Disassembly: 

Gently pry and lift off the colored plunger button cap from the mLINE pipette and lay aside for reassembly later on. Shop all colors here.

Plunger button caps of all colors
Step 2:  

Gently push up on the tip ejector button with your thumb to loosen/detach the black or blue colored body collar from the pipette. Lift and lay aside for reassembly later.

mLINE body collar. Can be blue or black.
mLINE plunger button cap removal. Gently push the ejector button with your thumb until the body collar detaches.
Step 3:

Continue to gently slide and remove the tip ejector mechanism from the pipette body until it is fully removed.

Slide the mLINE tip ejector out of the pipette body
Step 3A:

With the tip ejector removed, you should have these three parts laid aside:

  • New mLINE replacement Tip Ejector (gray or blue colored): SA 726005
  • Body Collar: SA 726002
  • Plunger Button Cap: Shop all colors here

Note: The tip ejector collars and tip ejector may come in a blue or gray color. Other than color, they are both the same and interchangeable

mLINE tip ejector parts: tip ejector, plunger button, collar cap.
Step 4 Reassembly:

Gently line up the tip ejector posts with the body slots. Once aligned, slowly insert and slide the new tip ejector assembly fully into place.

Step 5 Reassembly:

Re-attach the blue or black colored collar assembly. Gently push it down until it seats firmly in place.

Reassembly: Line up the tip ejector and collar cap into the pipette body
Step 6 Reassembly:

Re-install the plunger button onto the pipette plunger rod.

Step 7 Reassembly:

Test out the newly replaced mLINE tip ejector by installing and ejecting pipette tips.

Complete mLINE pipette

Disclaimer: Any action you take using the information on this website is strictly at your own risk. The information herein does not constitute professional advice and is general in nature. We make no warranty that this information will meet your requirements, be safe, accurate, or error-free. Pipette Supplies, Inc. is not responsible for any errors or omissions, any results obtained from the use of this information, or any loss or damage arising out of the use of this information. This site is for educational purposes only.
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