Combination Valve, Checking
Special Tools And Workshop Equipment Required
- Hand Vacuum Pump VAS 6213
Procedure
- Vacuum lines and hose connections free of leaks.
- Vacuum lines not plugged.
-- Remove the vacuum hose -1- or -2- on the combination valve being checked.
The hose to the right combination valve is shown in the illustration.
-- Connect the Hand Vacuum Pump VAS 6213 to the vacuum hose for the combination valve to be checked.
-- Remove the front secondary air hose -arrow- from its bracket and disconnect it; do to so press the release buttons.
-- Blow into the secondary air injection hose using light pressure (do not use compressed air). Lengthen the secondary air injection hose with an extension hose, if necessary.
- The secondary air injection combination valves must be closed. It must not be possible to blow through.
-- Operate hand vacuum pump.
- The relevant combination valve must open, it must be possible to blow through.
-- If the secondary air combination valve does not open, replace it, refer to COMBINATION VALVE, REMOVING AND INSTALLING .
Assembling
Assembly is performed in the reverse order of disassembly, noting the following:
Replace the O-ring.