Push-fit ECAS 4mm is a spare part from Bondtech

Push-fit Replacement Guide

The Push-fit ECAS 4mm is bench pressed inside the extruder plastic housing until it flushes.

To replace it, we have to extract the old and install the new.

Perform the following procedures in this order:

1. Use a flat screwdriver and insert it in between the black plastic and the grey metal collars of the push-fit.
2. Twist the screwdriver to pull the black plastic collar out.
3. Use a star screwdriver and insert it inside the grey metal collar.
4. Pull out the gold grid inside.
5. Use the star screwdriver again to pull the grey metal collar out from the housing from the inside.
   1. This prevents damaging the external surface of the housing.
   2. There will be some damage inside the housing hole for the push-fit as you extract it.
   3. This will be addressed later.
6. Some push-fit components may still be inside.
   1. Check if the black plastic and black rubber gaskets are still inside.
   2. If they are, pull them out using the same star screwdriver.
7. Clean as good as possible the housing hole.
   1. We will have to glue the new push-fit in.
   2. The glue will fill the missing plastic removed during the metal collar extraction.
8. Take the black and grey half of the push-fit and apply superglue in the external surface of the grey metal, below the collar.
9. Push it inside the housing hole. Press it down straight, slowly and hard until it flushes.
10. Let the glue dry and check if it’s holding strong.
11. Press the black plastic collar inside the grey metal collar to finish the replacement.