[piotrsko]

Depending on the base vehicle, it is possible that a 4wd manual transmission will do what you want. Jeep ford chevy dodge, your choice. Or graft a borg warner 13-40 series transfer case

 

[goingbush]

Why not just put a PTO on the gearbox and drive the vacuum and hp pump direct , so much more efficient .

Iveco Daily 4x4 55S17W has 3 x PTO outputs , one behind transfer case , one on side of ZF6S400 gearbox and a belt PTO facility on engine.

 

[Karter2]

Where are you located ? ..Europe, USA, ??
Gm fitted a range of cars with belt driven "Altermotors". ( high powered alternators that can also act as motors) ..some as big as 12-15 kW (20 hp).. For what is known as "Mild Hybrid" drives. Saturn is one model that comes to mind.
Continental are also making similar units for Audi / VW and Merc in Europe now for the same application.
One of those units could generate the power, and a twin could act as the motor drive for the compressor/pump. I am gussing you should be able to repurpose much of the controls also.
Sorry , but i dont know of a vendor dealing with these systems pre configured.

 

[brian_]

Gm fitted a range of cars with belt driven "Altermotors". ( high powered alternators that can also act as motors) ..some as big as 12-15 kW (20 hp).. For what is known as "Mild Hybrid" drives. Saturn is one model that comes to mind.
Continental are also making similar units for Audi / VW and Merc in Europe now for the same application.
One of those units could generate the power, and a twin could act as the motor drive for the compressor/pump. I am gussing you should be able to repurpose much of the controls also.
Sorry , but i dont know of a vendor dealing with these systems pre configured.

Interesting idea.
GM calls this BAS (for Belted Alternator Starter).