Loctite is supposed to let go at around 400 *F
I expect they can be pushed out without heat, or if heat is necessary just heat the bushing it's self from the inside likely no extra heat will be necessary on the spindle.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-