Tweco Hefty II CC CV Voltage Sensing Wire feeder - Manual (Page 31)

inlet port (marked IN) side of the gas valve
is connected to the main gas supply; other-
wise, the gas valve will leak. After maintenance, operate the gas valve a few
times to be sure of proper operation. If the gas valve
continues to show signs of improper operation,
replace the gas valve assembly.
Figure 6-2 Gas Valve Assembly
430429-456
MAINTENANCE
6-2 June 5, 2000 Revised