Operating Pressure, Checking

Operating pressure of hydraulic brake servo, checking

Test conditions:
V-belt tension OK
no leaks in servo system

Work sequence

- with engine not running, press brake pedal about 20 times to reduce pressure in system




- disconnect wires on warning light switch and remove switch (arrow)




- attach pressure gauge with hollow bolt and copper washers to brake servo unit

NOTE: Attach thick copper washer between brake servo unit and banjo fitting and thin copper washer between hollow bolt and banjo fitting

- start engine and let idle until pressure gauge reads more than 140 bar (2030 psi)
- if specified pressure Is not reached, check delivery rate of central hydraulic pump
- turn ignition OFF, leave pressure gauge connected