Brake Control System and Diagnosis: 4A-19
Brake Booster Components
S3RH0A4106015
CAUTION
!
Never disassemble brake booster. Disassembly will spoil its original function. If faulty condition is
found, replace it with new one.
NOTE
The figure shows LH steering vehicle.
Booster Operation Inspection
S3RH0A4106016
There are two ways to perform this inspection, with and
without a tester. Ordinarily, it is possible to roughly
determine its condition without using a tester.
NOTE
For this check, make sure that no air is in
hydraulic line.
Check Air Tightness
1) Start engine.
2) Stop engine after running for 1 to 2 minutes.
3) Depress brake pedal several times with the same
load as in ordinary braking and observe pedal travel.
If pedal goes down deep the first time but its travel
decreases as it is depressed the second and more
times, air tightness is obtained.
I3RH0A410022-01
1. Booster assembly 5. Clip 8. Push rod clevis
2. Gasket 6. Nut 9. Brake master cylinder
3. Brake vacuum hose 7. Clevis pin lock nut (LH) 10. Master cylinder fixing nut
4. Clevis pin 7-1. Clevis pin lock nut (RH) : Tightening torque
1. 1st 2. 2nd 3. 3rd
I2RH01410005-01
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