dh0502pf20033x

5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94

Tipo dh · tema 42.40 · versione 9406 · 1994-02-06

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Collocazione

Gruppo funzionale 2 Telaio › 42 Freni impianto idraulico e meccanico › 42.40 Regolazione slittamento in accelerazione (ASR) — Serie 124 · Serie 129 · Serie 140

Test programme - hydraulical Testing

Test
step

Fault code

Scope of test

Measuring equipment/
test connection

Operation/
requirement

Nominal value

Possible cause/remedy 1)

1.0

Pressurizing pump, ASR (M15)

10 bar at "SP"

41 68

Ignition: ON
(max. 60 s)

1.8-11 bar 2)

Cables,

hydraulic connections leaking,

M15

2.0

Return pump/charge pump (A7/3m1) and accumulator

250 bar at "SP"

Engine: Idling

Pressure rises rapidly to
50-110 bar, then slowly again to
150-200 bar
Charging time max. 60 s

Hydraulic connections leaking,

if pressure does not build up, or builds up too slowly (max. 60 s):

23 22.0
Hydraulic unit (A7/3)

If pressure builds up quickly to values below 50 bar and then builds up slowly to maximum pressure or rapidly and consistently to maximum pressure:

Accumulator

1) Note conditions for test.

2) The large tolerance specified for the pressure value (1.8-11 bar) depends on manufacturing tolerances in the pressurizing pump, the ASR hydraulics unit and the return valve of the pressure accumulator.

Test programme - hydraulical Testing

5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94
5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94
5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94

Figure 1

ASR hydraulic unit (A7/3) bleed screw "SP"

Figure 2

M15 Pressurizing pump ASR

Figure 3

Model 124

N30/1 ASR control unit

Test programme - hydraulical Testing

5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94
5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94
5.2 - Acceleration skid control (ASR) 33 - Test programme - hydraulical, Testing, Model 124 with module box, Model 129 with module box up to 05/94, Model 140 up to 05/94

Figure 4

Model 140

N30/1 ASR control unit

Figure 5

Model 129

N30/1 ASR control unit

Figure 6

Connection for brake fluid filling or bleeding equipment to brake fluid reservoir

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