Vacuum Pump Check

VACUUM PUMP CHECK
Before connecting vacuum pump to the A/C system, run pump connected to the low pressure gage to determine the vacuum pump capability. If the vacuum system is unable to reach at least 711.2-736.6 kPa (28-29 in. Hg) or more vacuum, the system should be checked for leaks. If no leaks are found, the vacuum pump may require repair.