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fig.10
fig.12
7.
BRAKING sysTeMs
7.1.
Testing Brake servo Diaphragm
7.1.1. remove vacuum supply line from brake servo fitting. Attach Vs4021 vacuum tester to vacuum supply port on servo (fig.13). operate pump to create
approximately 15inHg of vacuum and wait for 30 seconds. no vacuum drop should be observed on the gauge reading. If the vacuum drops this indicates
that the brake servo diaphragm is faulty. In this case the servo should be removed for overhaul by an authorised repairer or replaced.
7.2.
Brake Bleeding - Assembly of Brake Bleeder Kit
7.2.1. Ensure that the vacuum pump is connected to the brake bleeder reservoir in accordance with the assembly diagram (fig.14). failure to do so will result in
brake fluid being drawn into the vacuum pump.
7.3.
Brake Bleeding procedure.
WARNING! Familiarise yourself with the hazards of brake fluid - read manufacturer's instructions on the container. Do not touch the vehicle's
brake pedal whilst bleeding the brakes.
7.3.1. refer to the specific vehicle manufacturer's instructions for brake bleeding and wheel sequence procedure before proceeding. If no specific instructions
from the vehicle manufacturer exist, follow the instructions detailed below.
7.3.2. remove the cap of the vehicle's master brake fluid reservoir. If the fluid level is not at maximum, top it up.
7.3.3. Attach the appropriate size bleeding attachment to the bleed nipple on the brake calliper of the first wheel, normally nearest to master brake fluid reservoir.
7.3.4. operate vacuum pump until approximately 21inHg vacuum is created.
7.3.5. Apply copper grease to the brake bleeding nipples before and after the brake bleeding procedure to reduce the possibility of seized or broken nipples
when the brakes are next bled.
7.3.6. open the bleed nipple about a quarter of a turn. Allow brake fluid to be drawn until no air bubbles are visible in the brake fluid in the clear hose.
7.3.7. tighten the bleed nipple.
7.3.8. remove the attachment from the brake nipple.
7.3.9. repeat the process as necessary.
NOTe! check the master brake fluid reservoir regularly to ensure that the level does not drop too far, and top up as necessary.
NOTe! Empty bleeder container regularly and DO NOT allow container to overfill as brake fluid will be drawn into vacuum pump.
WARNING! When brake bleeding and/or fluid changing is complete, test the action of the brake pedal to ensure that the brakes are working
before attempting to drive the vehicle on the road and test the vehicle for satisfactory performance of the braking system.
7.4.
clutch Bleeding procedure.
7.4.1. refer to the relevant vehicle manufacturer's instructions for clutch bleeding procedure. If no specific instructions from the vehicle manufacturer exist, follow
the same basic procedure as the brake bleeding instructions above.
© Jack sealey limited
fig.11
fig.13
Original Language Version
Vs4021
Issue: 1 - 08/06/12
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