Extruder ring too large diameter?

I’ve got a white ring which doesn’t fit into the alu-plate. In this way the heater block makes contact with this plate and is not thermally isolated. Is this ment to be this way ? In the manual the ring fits through the hole.

The diameter of the hole is 17.9 mm , of the ring 18.1 mm.

I was also a bit confused, but the manual says "Next slide the white plastic spacer into the aluminium bracket. You may need to use some force.

I used some force and it worked for me.

Fixed it by reducing the diameter of the white ring a bit.

The white ring is supposed to be a push-fit into the aluminium bracket, to eliminate any play in the extruder.

Ok, but in the dutch version of the manual that tight fit isn’t mentioned.

I did file the edge of the hole to make a start to push it in. Put it on the floor and use my heal to push it in with a force of 86 kilo’s.