Hey,
You have a diesel, the alt is only necessary to keep the fan belt tight. If some place remote, just turn everything off & keep going. I have done it many times. The battery is good for a few hours at least. There are many other parts that I would be concerning myself about before the alt.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving