Front Wheel Bearing R&R

[Scott ZHP]

Originally Posted by andrewwynn

I own a similar bearing press tool. The problem with the kit is it uses a 3/4 inch bolt which is only good for about 11 tons of force. I stripped three of these bolts changing two bearings before I upgraded to a 1" bolt (31T force).

The 3/4 rod would probably work for the rear bearing as it felt like overkill when I used the 1" upgrade on the rear bearing.

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I've seen this quoted a number of times. Just curious where you're getting this figure.

Grade 8 3/4 SAE is good for a minimum of 50,000lb tensile strength. That's more than enough to yank a wheel bearing, IMO. In this application, I wouldn't use anything BUT a hardened grade 8 threaded rod/bolt (black oxide coated, not plated) from a reputable supplier (McMaster, Grainger, etc). Is your figure above for Gr5 or maybe Gr2?

I also grease the threads of the puller; helps tremendously.