kingnero
Mechanical
- Aug 15, 2009
- 1,773
I've got an o ring that seals the oil pickup filter in an automatic transmission (ZF 4HP22). I contacted ZF, but so far no reply and I'm in a hurry to get the car back onto the road.
The O ring that came from the car is obviously not elastic anymore (24 yrs old most likely, as old as the car).
I can buy those from a nearby automotive shop, that sells them per piece and they have an enourmous range of dimensions and materials.
The o ring goes over an locator extrusion on the filter side, about 2-3 mm high (external dimension 39.30 mm diameter), and when in position, into a recess with internal diameter 42.75 mm
Current thickness of the o ring is 2.2 mm.
How do I choose the correct dimension?
As for the material, I guess with NBR shore 70, I can't do much wrong (is resistant against hydraulic oils like Dexron III, which I am using), and is very common. Please correct me if this is not a good choice.
The O ring that came from the car is obviously not elastic anymore (24 yrs old most likely, as old as the car).
I can buy those from a nearby automotive shop, that sells them per piece and they have an enourmous range of dimensions and materials.
The o ring goes over an locator extrusion on the filter side, about 2-3 mm high (external dimension 39.30 mm diameter), and when in position, into a recess with internal diameter 42.75 mm
Current thickness of the o ring is 2.2 mm.
How do I choose the correct dimension?
As for the material, I guess with NBR shore 70, I can't do much wrong (is resistant against hydraulic oils like Dexron III, which I am using), and is very common. Please correct me if this is not a good choice.