PEUGEOT 504 Series 1970 Workshop Manual page 392

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BRAKES
PRESSURE TESTING
II · LOW PRESSURE TESTING
- Unscrew the knurled nut (a) to release nressure to
zero
("0") on the L.P. gauge (d).
N.B. ·If pressure is indicated, however low, refer to
servo-unit checking, page 10 06.
- Gently turn the knurled nut lockwiS€ until the
pressure is stabilised at, 10 p.s.1. (0,7 bars).
- There should be no fall in pressure after an interval
of 15 minutes. If there is. check for leaks around
cups and seals. Trace, rectify and re-check.
N.B. - Leakage through the main cup of the master·
cylinder will not be indicated by a fall in liquid level,
or by traces of fluid on the outside.
- 504 with dual-circuit master-cylinder
- Close the rear bleed screw.
Connect the Testarc
50
gauge to the rear circuit
and the bleed hose and bottle to a rear bleed screw
hole.
· Repeat
the test
as at I and 11.
- Top-up fluid level, in the reservoir.
1212 • E