Diesel leaking near injectors

   / Diesel leaking near injectors #1  

coloradotrout

Gold Member
Joined
Aug 19, 2005
Messages
350
Location
Eastern KS
Tractor
JD 4100 HST CUT w/Yanmar 3TNE74 | JD 300 Lawn
My 4100 cut is leaking a bit of diesel near the glow plugs. I tightened one, but still leaking. Any suggestions? Google suggested maybe the lines.
 
   / Diesel leaking near injectors #2  
Check the lines for cracks, could be a crack under the nut on the injector. Clean with brake cleaner, let dry and than look were it gets wet.
Be careful with the high pressure!
 
   / Diesel leaking near injectors #3  
Many injectors have a lightweight return line to permit excess fuel to return to the tank. Check that none have shaken loose. They frequently have plastic fittings which can crack, too.
 
   / Diesel leaking near injectors #4  
Probably the aluminum washer/gasket under the return line..??
Does it have a return line & a large nut holding it down onto the injector.??
IF SO, they have a aluminum gasket/washer under the line.. SOMETIMES u can flip the washer over & reuse it..
BUT my thinking is.. if u took the time to take them all off, replace them ALL..
 
   / Diesel leaking near injectors #5  
I agree with thepumpguysc I usually find one leaks and pend more time and effort in assembly and reassembly over and over
wishing I had just replaces them all (specially when the $ is pretty low on the washers)
 

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