Checking Compressor For Leaks

Information

For illustration purposes, the compressor is shown without the gear support.

Secure the Hose Adapter -VAG 1687/13-1- at the bottom of the compressor housing.
Secure hose connections with hose clamps.

Fig 1: Identifying Hose Adapter VAG (1687/13-1)
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-Hose Adapter VAG 1687/13-3- must be secured at the top of the compressor housing.
Secure hose connections with hose clamps.

Fig 2: Identifying Hose Adapter VAG. (1687/13-3)
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Secure hose adapter -VAG 1687/13-2 - to the compressor housing with adapter -VAG 1687/10- .
Secure hose connections with hose clamps.

Fig 3: Identifying VAG. (1687/13-2) With Adapter VAG (1687/10)
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Prepare Charge Air System Tester -VAG 1687- as follows:
Unscrew pressure control valve -2- completely and close valves -3- and -4- .

Fig 4: Identifying Charge Air System Tester Components
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Connect the charge air system tester to compressed air -1- and to the Adapter -VAG 1687/10- as shown.

Fig 5: Connecting Tester To Adapter
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If there is water in the inspection glass, open the drain screw -6- and drain the water.
Open valve -3- .

Fig 6: Identifying Charge Air System Tester Components
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Use the pressure control valve -2- to set the pressure to 0.5 bar .
Open valve -4- and wait until the test circuit is full. Set the pressure to 0.5 bar again if necessary.

Close valve -3- and check the pressure gauge.

Fig 7: Identifying Charge Air System Tester Components
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The pressure must not drop by more than 0.1 bar in 30 seconds .
Check the charge air system for leaks by listening for hissing noise, by touch, using commercially available leak detection spray or using the ultrasonic detector UD 150 WE 1038 .