Mounting spare 19.5 Tire underneath

I have had 2 tire failures on a class A MH, both were on my 1987 Itasca and in both cases I was able to put on my spare with no problems (19.5 tires which were mounted like a "continental spare" on cars of the old days). My current MH with 19.5 tires carries a spare mounted under the coach ahead of the rear bumper. It hinges in the front and lets the tire swing down towards the rear. The tire is mounted and very heavy. At my age (74) I am not strong enough to lift it back up, I may have been able to do it 20 years ago but not now. I carry a jack that I hope will help get get it back up but also have Good Sam insurance which is supposed to change a tire. I would not feel safe without a spare tire!