This is incredibly timely for me, and a bit sad. Even though I don't know you Beagle, it is a loss, and I thank you for this and the other info you have shared.

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1985 300D-189k The 'UD', Ivory and Pinkamino
1979 300D-211k Dark Gray, Parchment
A 1980 Harley-~166k and
A 1994 Ford diesel pickup-349k and
A 1990 gasser Volvo wagon-145k

Any maintenance to be done on those?

Email me if there is, as I probably will not get back to check this thread.

NO.

The later 60x vacuum pumps where superseded many times due to failure issues.

There are NO repair kits for any of them.

the current valid part number is:
Vacuum Pump
MB# 000 230 31 65

.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/