Checking Check Valve - Ar43.10-D-0023H

MODEL 906

Shown on model 906

Courtesy of MERCEDES-BENZ USA

	Check
	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
1	Connect testing unit to brake booster	Test connection	Fig 2
1	Connect testing unit to brake booster	Vacuum tester	Fig 1
2	Start engine and read off measured value	MODEL 906 with ENGINE 642 Allow the engine to run at idle for at least 30 s. Allow the engine to run at idle for at least 30 s and depress the accelerator pedal sharply several times during this time.
2	Start engine and read off measured value	Vacuum in hose after engine has been running for 30 seconds	*BE43.05-N-1001-01C
3	Switch off engine, read off measured value	Switch off the engine and immediately read off the measurement value at the vacuum tester (1). The vacuum is permitted to drop by max. 0.2 bar in 10 min. If there is a vacuum loss of above 0.2 bar replace vacuum line with check valve.
3	Switch off engine, read off measured value	Vacuum in hose after 10 min engine OFF	*BE43.05-N-1002-01C
4	Disconnect testing unit at brake booster	MODEL 906	AR43.10-D-0024-01H

CHECK VALUES FOR CHECK VALVE/VACUUM PUMP

Number	Designation			Model 906
BE43.05-N-1002-01C	Vacuum in hose after 10 min engine OFF	at check valve	bar	≥0, 3

CHECK VALUES FOR CHECK VALVE/VACUUM PUMP

Number	Designation			Model 906
BE43.05-N-1001-01C	Vacuum in hose after engine has been running for 30 seconds	at check valve	bar	≥0, 5
BE43.05-N-1001-01C	Vacuum in hose after engine has been running for 30 seconds	at vacuum pump	bar	≥0, 92

Fig 1: Vacuum Tester (201 589 13 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Test Connection (168 589 08 63 00)

Courtesy of MERCEDES-BENZ USA