Na kad 'bomba' butu restauruojama tai dar neteko girdeti, ir nelabai isivaizduoju kaip tai imanoma.......
The hydraulic pressure accumulator ( BOMB ) holds pressure in the system for emergency assist if the hydraulic pump fails or the engine quits altogether. It's a nitrogen vessel that holds several thousand PSI. It is believed that over time the nitrogen leaks out of the system (diffused through the diaphragm), because almost all accumulators start to go bad after about seven years of service.
The standard tests:
If the brake light stays on for several seconds after starting the car, suspect the bomb.
After driving, shut down engine and pump brake pedal until it looses power assist (gets stiff). If it takes less than 10 presses of the pedal, you could have a bad bomb. Beware that when doing this test, the Pentosin reservoir may overflow (spew out the cap). This is because you are discharging the fluid from the bomb, and often the reservoir doesn't have enough space to hold the extra fluid. Consider removing some fluid before this test.
Press brake pedal as hard as possible while engine is running and car is stationary or moving slowly. If brake light comes on and the pedal initially feels like it has no assist, the bomb may not be holding pressure.
A thorough test:
Engine running at idle, steering to right or left full lock 20 seconds, at the same time pump brakes hard 10 to 15 consecutive times. Does brake light come on? Yes = bad belt, pump, or bomb (check valve). Try a pentosin bleed before replacing the parts!
If light doesn't come on: stop engine, pump brake 10 to 15 times (short quick strokes). Brake light on? Yes = bad bomb (pressure accumulator).
If light doesn't come on: Drive the car in a very safe place at 65 mph then apply full stop pressure to brakes (emergency stop pressure!). Does ABS actuate several times? Yes = good bomb! Brake light on? Yes = probably bad ABS sensor.
Tema: AUDI V8 - Pokalbiai ir diskusijos (Skaityta 2074361 kartus)
2022 Lapkričio 06, 08:26:31 
