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Tight hub nut

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Old Aug 10th, 2019, 20:47   #31
Laird Scooby
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At least the abs sensors were nice and easy to get out

Attachment 121808
Before you refit the ABS sensors Mark, polish the insides of the holes with a Dremel or similar, if possible enlarging them ever so slightly by using a sanding drum then polishing them.
When you refit the sensors, smear the outsides of the sensor bodies (but not the tips) in Vaselin or a similar waterproof grease to protect the inside of the holes they live in so if and when you need to remove the sensors, they'll pop out easily.
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Old Aug 10th, 2019, 20:51   #32
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Good tip Dave
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Old Aug 10th, 2019, 20:55   #33
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Thanks Mark - you see the blue 740GLE in my Avatar - the front ABS sensors will come out easily on that if needs be!
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Old Aug 10th, 2019, 20:59   #34
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Thanks Mark - you see the blue 740GLE in my Avatar - the front ABS sensors will come out easily on that if needs be!

Perhaps you shouldn't have told me that Dave as I'll be needing two fairly soon
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Old Aug 10th, 2019, 21:03   #35
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Perhaps you shouldn't have told me that Dave as I'll be needing two fairly soon
https://www.ebay.co.uk/itm/ABS-Senso...1/263202894244

Says only one left, they keep restocking so watch the listing and when there's 2 available agin...............
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Old Aug 16th, 2019, 19:18   #36
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The bolts securing the front brake back plates on my 1992 940 are roundhead with hex socket. I damaged mine whilst removing them. Fortunately there is an excellent specialist fastener supplier local to me. Took one to them and they were able to provide replacements from stock.
Managed to remove the nearside hub nut by the brakes on and long breaker bar method. The offside one was extremely difficult, breaker bar and scaffolding pole and sledge hammer.
I never managed to loosen that FOS hub nut so haven’t yet accessed those brake back plate securing screws. However, although it was a few years ago, I’m reasonably sure that those screws on the FNS back plate were round head with hex socket.
I’m preparing to have a go at the FOS again when I give the front brakes calipers/pads their annual clean & lubricate. To this end I took the car to my friendly local tyre fitter who has a powerful impact wrench to ask him to loosen that FT hub nut. His “Makita” made short work of that nut. It took him longer to stop what he was doing and walk to my car than it did to loosen the nut, which I torqued up again to drive home. I haven’t got the hub off yet, but a close examination of the back plate securing bolts on that side seems to confirm that they are normal hex head flange screws. I hope to start the job tomorrow, weather permitting.
Just for the record, I completely agree with Dave’s suggestions re cleaning out the ABS sensor hole and lubricating it. When I had to replace the defective FOS sensor I had to destroy it to get it out. I did as Dave has suggested when fitting the replacement.

Last edited by Ian21401; Aug 16th, 2019 at 19:23. Reason: Add text.
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Old Aug 16th, 2019, 20:00   #37
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Just for the record, I completely agree with Dave’s suggestions re cleaning out the ABS sensor hole and lubricating it. When I had to replace the defective FOS sensor I had to destroy it to get it out. I did as Dave has suggested when fitting the replacement.
Some, but not all, of the methods i used to remove the old ones include a drill, hammer and brass drift, blowlamp, hacksaw (once i had a big enough hole, i put the blade through, refitted to the frame and then cut a slit in the outer case of the sensor to try and ease the tension on it) and a few others i can't remember now.

Didn't fancy ever having to do that again hence the idea to enlarge, polish and protect the hole with grease before the new ones went in!
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Old Aug 16th, 2019, 20:50   #38
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Some, but not all, of the methods i used to remove the old ones include a drill, hammer and brass drift, blowlamp, hacksaw (once i had a big enough hole, i put the blade through, refitted to the frame and then cut a slit in the outer case of the sensor to try and ease the tension on it) and a few others i can't remember now.

Didn't fancy ever having to do that again hence the idea to enlarge, polish and protect the hole with grease before the new ones went in!
Very similar to my methods Dave.
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