Remove screws attaching vacuum control unit and remove unit. Remove screws attaching cover to unit body and remove cover, spring, and diaphragm. Remove screws attaching subzero assist nozzle and remove nozzle. Remove screws attaching accelerator pump and remove pump. Remove screws and remove pump inlet ball (inlet valve) and outlet ball (outlet valve). Remove slow jets of primary and secondary stages and all air bleeds from body. Remove main jets by removing plug from body.
NOTE:
Do not remove venturi.