Fuel water separator question

[j_boucher]

Getting ready to do a fuel system filter change "first-time new owner" and had just a quick question does the knurled connector on the bottom of the fuel water separator turn to drain the fuel ? I only ask because it's very tight and I don't want to break it off accidentally. I looked in TMs and I found it mentions draining it but doesn't show the drain valve / unless I missed it

 

[Jonas947]

Its to drain the Fuel filter From water. Just screw off the whole filter. The bottom cap is not that cheap.

 

[j_boucher]

Its to drain the Fuel filter From water. Just screw off the whole filter. The bottom cap is not that cheap.

Thanks, I meant to say drain the water. Should the knurled connector be rock-tight?

 

[NDT]

Should be finger tight when you re-tighten it. The part is plastic so go easy on it if you use tools to loosen it

 

[Adrok]

Petroleum ( fuel and oil ) floats. Opening the knurled connected drains the water. Just drain until definitive fuel runs out.
If it is not hand tight, be cautious using a tool. Plastic parts deform and crush easily. Especially when aged and exposed to petroleum products.

 

[GeneralDisorder]

Operator level PMCS (After Operation):

1. Check fuel/water separator (Figure 4, Item 3) for leaks or damage. Notify Field Maintenance if leaks or damage are found.	Class I leak exists. Pass Fail
2. Check for presence of water in bowl (Figure 4, Item 4) of fuel/water separator (Figure 4, Item 3). If there is water in bowl, perform the following steps:	Class I leak exists. Pass Fail
a. Place suitable container under drain valve to collect fuel.
b. Turn knurled nut (Figure 4, Item 5) at bottom of fuel/water separator (Figure 4, Item 3) to the left to open drain valve.
c. Close drain valve by turning knurled nut (Figure 4, Item 5) to the right. Dispose of fuel in accordance with AR 200-1.

Review of the -10 manual is a good practice. More civilians with military vehicles should learn about the process.

 

[j_boucher]

I got it to turn, I was gentle with a pair of cannon plug pliers ... thanks for the help

 

[Ronmar]

Except that PMCS procedure skips a simple step...

Read the ring around the primer pump. you need to pump the water/fuel out the bottom of the filter bowl using the primer, when you open that drain.
if you open the bowl drain and it start sucking air into the bowl, that means your bypass flapper valve is leaking. the fuel in the line will flow back to the tank and suck air in thru that drain...

just did a video on maintaining that primer on my youtube channel username: Rronmar

 

[j_boucher]

Except that PMCS procedure skips a simple step...

Read the ring around the primer pump. you need to pump the water/fuel out the bottom of the filter bowl using the primer, when you open that drain.
if you open the bowl drain and it start sucking air into the bowl, that means your bypass flapper valve is leaking. the fuel in the line will flow back to the tank and suck air in thru that drain...

just did a video on maintaining that primer on my youtube channel username: Rronmar

Thanks Ronmar , I will check it out tonight