DRC System Pressure Checking

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Special Tools And Workshop Equipment Required

DRC Pressure Tester :VAS6209/2
Hand Vacuum Pump :VAS6213

:VAS6209/2 Bleeding

Use only approved oil for the bleeding procedure.

NOTE:

The :VAS6209/2 must always be bled the first time it is used.

If the :VAS6209/2 still shows a residual pressure greater than 0.5 bar (7.2 psi) (for example, from a previous reading), bleeding must not be done.

-- To bleed pressure gauge -B- and line section -A-, install special tool as shown in illustration.

Courtesy of AUDI OF AMERICA, LLC

NOTE:

The Illustration Shows Bleeding Process By Extracting Hydraulic Fluid Using a :VAS6213 .

-- Bleed process must be performed until air bubbles are no longer visible in hose -C-.

-- Disconnect hose -C and D- and perform system pressure check.

System Pressure Check Is Performed On Front Shock Absorber Of Corresponding DRC Line.

Courtesy of AUDI OF AMERICA, LLC

-- Remove the cap from the extract/fill valve and connect the :VAS6209/2 .

-- Read the system pressure on the :VAS6209/2 .

NOTE:

The pressure on the :VAS6209/2 :VAS6209/2 increases slowly and takes approximately two minutes. DRC system pressure can only be read when :VAS6209/2 needle has finally come to a stop.

-- Disconnect the :VAS6209/2 and install the dust cap.

NOTE:

A Small Oil Leak At The Connection That Results From Connecting Or Disconnecting The :VAS6209/2 is not critical. Multiple measurements should be avoided since the system loses a little amount of oil each time the :VAS6209/2 is connected. Every connection results in a pressure decrease of approximately 0.3 bar (4.3 psi) from the previous reading. Multiple repeated measurements decrease system pressure below minimum pressure or failure.

-- If The Pressure Is Not OK, Determine The Cause And Service The System.

DRC System Pressure Values

Pressure Value. Refer To Reference Temperature Of 20 °C (68 °F)

16 bar (232 psi) = operating pressure
15 bar - 16 bar (218 - 232 psi) = central valve new or as good as new
14 bar -15 bar (203 - (218 psi) = normal range of operation, system OK
< 14 bar (203 psi) = system leaking or not filled completely, air entering system, central valve has no pressure/is empty.