Vacuum Servo Unit - Triumph TR6 Handbook

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.3.
4.
Clean the clutch cylinder nipple (Fig. 85) and attach to it a
rubtrer tube of appiox. *" (6 mm.) boie allowing the other end
of the tube to hang submerged in a jar containing a quantity
of clean hydraulic fluid.
Unscrew the bleed nipple enough to allow fluid to be pumped
out (a half turn is normally sufficient).
Depress the clutch pedal firmly and allow it to return un-
assisted. Pausing between each depression continue pump-
ing until all air has been expelled from the system (denoted by
the absence of bubbles in the fluid being pumped into the jar).
With the pedal depressed, close the bleed nipple.
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Vacuum Servo Unit
The TR.6 is fitted with a brake servo unit, which, utilising
engine manifold depression multiplies the effort applied to the
brake pedal.
The servo unit is in direct line between the pedal and the
master cylinder. The system is arranged so that if, for any
reason, the servo system is inoperative braking can still be
effected, though requiring greatly increased pedal effort.
CAUTION. For reasons given above, it is extremely dangerous
to "coast" or manoeuvre the car without the engine running.
Fig. 84 (upper)
Fig. 85 (lower)
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