Daveinbuffalo Posted October 5, 2017 Share Posted October 5, 2017 Help. I have a 1996 ch613 Mack. I had a problem with the fuel. I believe it was contaminated. I drained tanks, filters, cleaned tanks, dried tanks, and then put new fuel in. The truck ran Great. Yesterday, I started the truck and she stalled. The drivers tank was dry! Seems like the return line may be plugged???. Since it is only a yard truck, how do I block off that tank so I just use the passenger tank? Any suggestions please and thank you Quote Link to comment Share on other sites More sharing options...
Mack Technician Posted October 5, 2017 Share Posted October 5, 2017 Dual draw dual return are a pain. Replace or disable the 3 way fuel union. Draw and return fuel from only one tank. Run a 3/8" or bigger low level crossover line (equalizing) between the two tanks, typically supported by a steel member bolted between tanks. Install emergency shut-offs at both low level fittings in case road debris rips it off. Good luck! 1 1 Quote Link to comment Share on other sites More sharing options...
keg1 Posted October 6, 2017 Share Posted October 6, 2017 I had that problem with my Ch it was the vent in the fuel cap. Loosened cap and checked later and they were evened out Quote Link to comment Share on other sites More sharing options...
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