- 266
- 727
- 93
- Location
- Jefferson, Massachusetts
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A Tale of Two Fuel Tanks...it's a tankless job
- Thread starter Wreckclues
- Start date
- 266
- 727
- 93
- Location
- Jefferson, Massachusetts
Just checked the Manual Fig. 46 TM 9-2320-260-20P lists the assembly as "vent". Parts list doesn't get into a lot of detail of the "whatsit", looks like the pipe bushing fits into it, but it's not shown.
- 266
- 727
- 93
- Location
- Jefferson, Massachusetts
The whatsit appears to be a pressure regulator. The top part vents freely to atmosphere. I filled the lower part with penetrating oil and charged the vent lines to 15 psi. Observed air fizzing through the oil.
See attached video
.
So this isn't a static situation and the length of tubing does reflect the pressure of the tank.
See attached video
.So this isn't a static situation and the length of tubing does reflect the pressure of the tank.
msgjd
Well-known member
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okay, thus it must also be affected by altitude .. So,,, with the Whatsit being mounted high on the firewall out of danger of fording operations, you add your current land elevation plus Whatsit height on truck, then multiply the result of the given polynomial by 1/3rd, then square that, then divide the result by the number of slices of pi(e) you had this month 
you are doing good work with this mystery !
you are doing good work with this mystery !
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