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CHECK VALVE OPERATION CHECK
1. Remove the check valve (Refer to ).
2.
cautionReplace the check valve when it is faulty.
Using a vacuum pump, check operation of the check valve.
 
Vacuum pump connectionNormal condition
When connected to the booster side (1)Vacuum is generated and maintained.
When connected to the engine side (2)No vacuum is generated.
Vacuum pump connectionNormal condition
When connected to the booster side (1)Vacuum is generated and maintained.
When connected to the engine side (2)No vacuum is generated.