M7040 fuel separator

R

Roughryder

New member

Equipment
M7040
Feb 2, 2019
1
0
0
Salem, Ohio
My M7040 seems to run fine, but I noticed the fuel level in the water separator bowl does not remain constant. It is usually about 1/2 full of fuel when the engine is running and within 3 seconds after turning off the engine the bowl fills up with fuel and will stay at that level until I restart the tractor, then is will drop again to half. I have changed the separator element and the spin on fuel filter and used the plunger on top the spin on filter to remove the air prior to stating the engine.

Is there something wrong?

Will the engine/injector pump be damaged if I continue to use the tractor?
 
A

AllDodge

Member

Equipment
M9540 RTV1100
Jan 19, 2019
191
0
16
South Central, ky
Look for a restriction. Many have found it between the separator and the tank. The fuel line is probably collapsing or the fitting entering into the fuwl/water Sep has the clog
 
Dave_eng

Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
5,234
1,017
113
Williamstown Ontario Canada
Roughryder said:
My M7040 seems to run fine, but I noticed the fuel level in the water separator bowl does not remain constant. It is usually about 1/2 full of fuel when the engine is running and within 3 seconds after turning off the engine the bowl fills up with fuel and will stay at that level until I restart the tractor, then is will drop again to half. I have changed the separator element and the spin on fuel filter and used the plunger on top the spin on filter to remove the air prior to stating the engine.

Is there something wrong?

Will the engine/injector pump be damaged if I continue to use the tractor?
Click to expand...
Something is wrong and I would not continue to use the tractor.
Do you have the operator's and WSM? If no send me a PM. Private message.

There is a hand pump on the engine to help you bleed the fuel system.
See it in this illustration.



The next image shows the fuel lines which are likely the source of your problem. Loose clamps, cracked hose, worn through.



Dave
 
T

Tx Jim

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Lifetime Member

Equipment
M7040 HDC-1,JD 4255,Ford 6700
Apr 30, 2013
1,199
128
63
Coyote Flats,Texas
I once owned a M4900 with a similar water separator that acted similar. Local Kubota dealer service manager told me to check for restricted passageway in WS housing or clogged screen. I found a clogged screen on fuel shut off valve in WS housing, Cleaned screen fuel problem solved.
 
GeoHorn

GeoHorn

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Equipment
M4700DT, LA1002FEL, Ferguson5-8B Compactor-Roller, 10KDumpTrailer, RTV-X900
May 18, 2018
6,034
3,308
113
Texas
The O-ring on the separator can also be leaking and allowing air to enter the unit. (It's not necessarily a fuel restriction...but may also be an ingress-air leak.)
 
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