ar4260w000201b

Checking function of check valve and overflow valves

Typ ar · téma 42.60 · verze 0100 · 2001-03-12

Platí pro: MODEL 950.20# /21# ## as of 423286 with CODE (A00) Air suspension front axle MODEL 950.20# /21# ## as of 423286 with CODE (A00) Air suspension front axle with CODE (B49) Auxiliary air reservoir

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 2 Podvozek › 42 Brzdy - hydraulická část a mechanická část › 42.60 Vzduchotlaková část — Řada 950 (modely 20*, 21*)

EinPAS 21 Brzdy/podtlakový systém/vzduchotlaké zařízení › 21.35 Vzduchotlaké zařízení › 21.35.13 Potrubí/hadice/ventil — Řada 950 (modely 20*, 21*)

AR42.60-W-0002-01B

Checking function of check valve and overflow valves

Danger!

Risk of accident from vehicle starting off by itself when engine running. Risk of injury from bruises and burns if you hold your hand into engine when it is started or when it is running.

Secure vehicle to prevent it from moving off by itself.
Wear closed and close-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

Checking function of check valve and overflow valves

Test kit

360 589 00 21 00

Checking function of check valve and overflow valves

W42.60-1085-02

Connection diagram with check valve (8.01) and overflow valves (7.02 and 7.01)

1 Compressed-air distributor

5.01 Air reservoir (40 l, air suspension) (V6.1)

5.01 Air reservoir (reserve, air suspension) (V6.2)

7.01 Overflow valve with backflow 10.3 bar (-0.3)

7.02 Overflow valve with limited backflow 10.0 bar (-0.4)

8.01 Check valve (standard as of approx. VIN K 423 286)

12.09 Condensation sensor

30.01 Safety valve 13.0 bar (+0.8)

38.02 Air suspension supply pressure test connection

38.02 Air suspension auxiliary air reservoir test connection (retrofit)

X Supply from air drier, connection 24

W To cab air suspension

Checking function of check valve and overflow valves

W42.60-0048-01

The check valve 8.01 is installed as standard as of approx. VIN K 423 286.

1 Connect test kit.

2 Connect test gauge 1 to tire inflation connection test connection (1).

3 Connect test gauge 2 to air suspension supply pressure test connection (2).

Checking function of check valve and overflow valves

W42.60-0049-01

4 Connect test gauge 3 to air suspension auxiliary air reservoir test connection (3).

If there is no test connection (3), one must be installed in the auxiliary air reservoir

5.01 (V6.2).

5 Release all pressure in the air suspension system.

6 Start engine and fill compressed-air system at idling speed.

Do not fill the compressed-air system from an external source.

7 Observe the pressure gages during the filling process and fill compressed air system up to the cutoff pressure.

First, the pressure on test gauge 1 (tire inflator connection) rises to approx. 10 (- 0.4) bar = opening pressure of overflow valve 7.02, then the pressure on test gauge 2 (air suspension supply) rises to approx. 10.3 (-0.3) bar = opening pressure of overflow valve 7.01, until finally the pressure rises to the cutoff pressure on all three gauges.

No air must escape from the vent on the pressure regulator during the filling process. If air loss is discovered before the cutoff pressure is reached, the compressed-air drier must be replaced.

8 Switch off engine.

9 Actuate brake. The pressure on test gauge 1 (tire inflator connection) should fall.

The pressure on test gauges 2 (air suspension supply) and

3 (air suspension auxiliary air reservoir) must not fall.

10 Operate air suspension system with operating unit until the pressure on test gauges 2 and 3 has dropped to approx.

5 bar.

The pressure on test gauge 1 (tire inflator connection) may drop to approx. 7 bar.

The pressure on test gauges 2 (air suspension supply) and

3 (air suspension auxiliary air reservoir) continues to fall.

If these test values are not obtained, the installed position (flow directions) of both overflow valves and of the check valve must be checked.

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