–
| Attach dial gauge -VAS 6341/1- to universal dial gauge bracket -VW 387-. |
–
| Secure universal dial gauge bracket -VW 387- to turbocharger as shown in illustration. |
l
| The dial gauge linkage must be in line with the linkage of the vacuum unit. |
–
| With pressure at 0 bar, set dial gauge -VAS 6341/1- to 1 mm preload. |
–
| Operate hand vacuum pump -VAS 6213- several times until the pressure displayed on turbocharger tester -V.A.G 1397A- is approx. 800 mbar. |
l
| Specification on dial gauge -VAS 6341/1-: 1 mm travel |
–
| Vent system via pressure control valve -VAS 6342- so that pressure reading drops to 0 mbar. |
Checking adjustment of vacuum unit |
–
| Set scale of dial gauge -VAS 6341/1- to „0“. |
Note The following measurements must be performed in the specified sequence. Do not allow the pressure to drop to 0 between measurements. |
–
| Operate hand vacuum pump -VAS 6213- several times until a pressure of 500 ± 5 mbar is displayed on turbocharger tester -V.A.G 1397A-. |
–
| Read off and note travel indicated on dial gauge -VAS 6341/1-. |
–
| Operate hand vacuum pump -VAS 6213- several times until a pressure of 800 ± 5 mbar is displayed on turbocharger tester -V.A.G 1397A-. |
–
| Vent system via pressure control valve -VAS 6342- so that pressure reading drops to 500 ± 5 mbar. |
–
| Read off and note travel indicated on dial gauge -VAS 6341/1-. |
–
| Determine average value: add values „1“ and „2“ together and divide by 2. |
l
| Specification: 5.50 ± 0.25 mm. |
Note
|
|
|