Discovery II
BRAKES
70-10
DESCRIPTION AND OPERATION
Vacuum pump (diesel models only)
1 Alternator
2 Vacuum pump
3 Brake servo assembly vacuum connection
4 Oil feed pipe
5 Oil drain pipe
As the diesel engine air inlet system does not produce sufficient depression to operate the brake servo assembly, an
engine driven vacuum pump is installed.
The vacuum pump is integrated with the engine alternator and driven by the auxiliary drive belt. The pump is a rotary
vane type, lubricated and cooled by engine oil supplied through a pipe connected to the engine block and returned
through a pipe connected to the engine oil sump. Air extracted from the brake servo assembly is vented into the oil
sump with returning lubricating oil.
