Air in water separator.

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
554
83
USA
Air in the sediment bowl is indicative of a fuel leak upstream from it or a compromised gasket on the bowl itself. You need to diagnose the issue and correct it and the air will go away.
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
554
83
USA
Usually a bleeder on the fuel filter, I'd purge it and see if the issue comes back. Procedure should be in your operators manual.
There are no 'bleeders' on Kubota fuel filters. The bleeder you refer to is a water drain on a commercial fuel filter for a big truck diesel and those are basically worthless.

He's sucking air somewhere between the sediment bowl and the fuel pickup in the fuel tank.
 

Tx Jim

Well-known member
Lifetime Member

Equipment
M7040 HDC-1,JD 4255,Ford 6700
Apr 30, 2013
1,199
128
63
Coyote Flats,Texas
Blocked fuel flow from fuel tank to water seperater can cause air in water seperater bowl
 

tthorkil

Active member
Lifetime Member

Equipment
M9540HDC12 / LX2610HSDC / ZD1011-48 / Bobcat S250
Jan 1, 2011
309
79
28
Bagley, MN, United States
There are no 'bleeders' on Kubota fuel filters. The bleeder you refer to is a water drain on a commercial fuel filter for a big truck diesel and those are basically worthless.

He's sucking air somewhere between the sediment bowl and the fuel pickup in the fuel tank.
 

Attachments

Ammobeetle

New member

Equipment
L4060HSTC
Jan 8, 2020
17
6
3
Hallsville, MO
There are no 'bleeders' on Kubota fuel filters. The bleeder you refer to is a water drain on a commercial fuel filter for a big truck diesel and those are basically worthless.

He's sucking air somewhere between the sediment bowl and the fuel pickup in the fuel tank.
1592514588125.png

Full procedure in the operators manual for mine.
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
554
83
USA
View attachment 44682
Full procedure in the operators manual for mine.
Nothing to do with any filter 'bleeder'. Purging the system of air involves a set procedure. The OP is getting air in his separator bowl. He has a an issue between the bowl and the fuel pickup and has nothing to do with a filter bleeder which don't exist on a Kubota.
Read the OP's post again. Has nothing to do with purging the system of air. He's GETTING AIR IN THE PLASTIC SEPARATOR BOWL WHEN RUNNING.


Duh.
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
554
83
USA
Blocked fuel flow from fuel tank to water seperater can cause air in water seperater bowl

...as well as a compromised fuel line (as in perforated). or an ill fitting bowl gasket (what I had and had to replace it).
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
554
83
USA
There are no 'bleeders' on Kubota fuel filters. The bleeder you refer to is a water drain on a commercial fuel filter for a big truck diesel and those are basically worthless.

He's sucking air somewhere between the sediment bowl and the fuel pickup in the fuel tank.

Maybe I should clarify my comment. There is a 'bleeder' but it's on top of the injection pump and when you change fuel filters or clean the separator you will have air in the bowl. You open the valve on top of the injection pump and allow the pump to expell the air in the system. That is the only 'bleeder' anywhere in the fuel system.

Air entering the bowl while the engine is operating (which has zero to do with filters) is a result of what I stated.
 

tthorkil

Active member
Lifetime Member

Equipment
M9540HDC12 / LX2610HSDC / ZD1011-48 / Bobcat S250
Jan 1, 2011
309
79
28
Bagley, MN, United States
Maybe I should clarify my comment. There is a 'bleeder' but it's on top of the injection pump and when you change fuel filters or clean the separator you will have air in the bowl. You open the valve on top of the injection pump and allow the pump to expell the air in the system. That is the only 'bleeder' anywhere in the fuel system.

Air entering the bowl while the engine is operating (which has zero to do with filters) is a result of what I stated.
View attachment 44698
M9000 Bleed 1.png
M9000 Bleed 1.png
M9000 Bleed 2.png
M9000 Bleed 2.png
 

SidecarFlip

Banned

Equipment
M9000HDCC3, M9000HD, Kubota GS850 Sidekick
Oct 28, 2018
7,197
554
83
USA
Gee... I have the Kubota WSM's for both mine but the owners manuals state that as well. In detail I might add.

Again (for the last time as it's getting tedious), if there is air in the plastic fuel bowl when the motor is running (not when changing or renewing anything), there will be a issue upstream from the housing. Could be a fuel line, could be the bowl gasket, could be a cracked bowl. You need to diagnose the issue and correct. real simple.

How it plays.
 

whitetiger

Moderator
Staff member

Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
Nov 20, 2011
2,919
1,380
113
Kansas City, KS
Nothing to do with any filter 'bleeder'. Purging the system of air involves a set procedure. The OP is getting air in his separator bowl. He has a an issue between the bowl and the fuel pickup and has nothing to do with a filter bleeder which don't exist on a Kubota.


Read the OP's post again. Has nothing to do with purging the system of air. He's GETTING AIR IN THE PLASTIC SEPARATOR BOWL WHEN RUNNING.


Duh.
Looks like YOU need to go back and read the OP's post. That is not what it says!!!
Just more of Flips BS........
 
  • Like
Reactions: 1 user