white smoke could be oil being pulled from vacuum pump into engine.. more likely is poor combustion caused by dirty or bad injectors or injection pump, you should do a compression test either way.

here are some images

http://www.peachparts.com/shopforum/diesel-discussion/293678-om617-vacuum-pumps.html

"Regarding the vac pump, look for engine oil in the large vac line that leads to the intake manifold. Its a diaphragm inside the pump that cracks and wears out and then engine oil gets sucked into the manifold vac line. Rebuild kits include the diaphragm, gaskets etc. But having the engine shut down vacuum solenoid working is very good sign, that indicates the vac pump diaphragm may not be dead. "

as far as bleeding back into the master, you make short strokes with a bleeder kit which should be included with the master when you got it... or available at any auto store, two or three plastic fittings with hoses run back into the master will push fluid and air, returning them to the top of reservoir. you should have some instructions or should be able to find them on the net some place.

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R107.043 Euro 350SL (parts)(crushed)
W116.024 280se (crushed)
W114 280 (m110)
W108.067 280se 4.5
W108.068 280seL 4.5 (crushed)
W111 220SEB coupe
W110 200D went to the crusher
W110 190D sold sold sold

1970 Rover P6B

Used to own(1950 buick,1969 lincoln MK3,4G63t colt,87 300ZX, 79 F100, 92 XJ40)