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BRAKE SYSTEM
515
BRAKES
TROUBLE SHOOTING OF VACUUM BOOSTER
ASSEMBLY BASIC TEST
IF THE BOOSTER IS NOT OPERATING
Disconnect the vacuum hose from the NRV.
Then with ENGINE RUNNING, check vacuum
supply with a vacuum gauge.
There should be at least 300 - 350 mm of Hg*
vacuum for Petrol vehicle.
When adequate vacuum
supply is obtained, repeat
basic test.
If, VACUUM SUPPLY IS
BELOW 300 mm of Hg
for petrol vehicle, replace
or repair vacuum hose
and vacuum source.
* At Sea Level
If, VACUUM SUPPLY IS
ABOVE 350 mm of Hg for
petrol vehicle, replace or
repair vacuum hose and
vacuum source.
OFF the engine, press brake pedal several times to remove vacuum from
Booster Assembly. After this the pedal application will feel hard to press.
Press the brake pedal and hold with light pressure of @ 10kgs. Start the Engine
If the booster is functioning satisfactory, the pedal will fall slightly and then hold.
Here less pressure will be needed to hold the pedal dawn.