ZD1211 Fuel Filter
- Thread starter RjCorazza
- Start date
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OP
RjCorazza
Elite Member
I was going to just use the tank valves, or install a gated wye for convenience.
What happened was :
- With the left tank valve closed, I used up the 6 gallons in the right tank... Just like you'd expect.
- Closed right tank valve, open left tank valve. After about 30 minutes of mowing on level ground, the left tank is empty and the right tank is FULL. (?)
The crossover air equalization tubing terminates at the top of each tank, so there could not have been any siphoning of fuel. There has never been any suction or pressure detected when removing the fuel caps, so I'm ruling the crossover tube out.
The only thing that remains is the fuel return line (s), and apparently there are several. If the fuel return line to the left tank was blocked, that would seemingly explain my recent symptoms.
I have blown out the one return line on the rear of the overflow pipe, which T's to each tank. On the front of the overflow pipe is a smaller hose that goes to a "T", with one side going to something called an Air Breather, and the other side of the "T" goes to the injection pump. I just don't see how anything from the front of the overflow pipe could explain the problem.
What happened was :
- With the left tank valve closed, I used up the 6 gallons in the right tank... Just like you'd expect.
- Closed right tank valve, open left tank valve. After about 30 minutes of mowing on level ground, the left tank is empty and the right tank is FULL. (?)
The crossover air equalization tubing terminates at the top of each tank, so there could not have been any siphoning of fuel. There has never been any suction or pressure detected when removing the fuel caps, so I'm ruling the crossover tube out.
The only thing that remains is the fuel return line (s), and apparently there are several. If the fuel return line to the left tank was blocked, that would seemingly explain my recent symptoms.
I have blown out the one return line on the rear of the overflow pipe, which T's to each tank. On the front of the overflow pipe is a smaller hose that goes to a "T", with one side going to something called an Air Breather, and the other side of the "T" goes to the injection pump. I just don't see how anything from the front of the overflow pipe could explain the problem.
workinonit
Elite Member
I have no idea which of my tanks empties faster. I just mow until the gauge says I need fuel and I add fuel. It sounds like there is nothing wrong with the mower it's just the way it is.
90cummins
Veteran Member
There are two check valves that are placed after the inline fuel filters.
These check valves prevent the tanks from transferring to each other. If one of them gets plugged only 1 tank to empty while the other stays full.
Remove them & clean them with low pressure air. Remember these are 1 way check valves.
Also make sure the filters are not plugged.
This should solve your problem so you can reinstall your Racor.
90cummins
These check valves prevent the tanks from transferring to each other. If one of them gets plugged only 1 tank to empty while the other stays full.
Remove them & clean them with low pressure air. Remember these are 1 way check valves.
Also make sure the filters are not plugged.
This should solve your problem so you can reinstall your Racor.
90cummins
Brown Dog
Veteran Member
- Joined
- Jun 5, 2014
- Messages
- 1,427
- Location
- North GA
- Tractor
- John Deere 5115M 5101E H260 5115M 540M all MFD
Mine has done this from day 1 brand new.
I run a $90 3qt hydroZorb membrane filter on my 550gal diesel tank & never had a problem with 3 tractors using from same tank.
It’s in the mowers fuel system some how.
I run a $90 3qt hydroZorb membrane filter on my 550gal diesel tank & never had a problem with 3 tractors using from same tank.
It’s in the mowers fuel system some how.
Hay Dude
Super Star Member
- Joined
- Aug 28, 2012
- Messages
- 18,403
- Tractor
- Challenger MT655E, Massey Ferguson 7495, Challenger MT535B, Krone 4x4 XC baler, (2) Kubota ZD331’s, 2020 Ram 5500 Cummins 4x4, IH 7500 4x4 dump truck, Kaufman 35’ tandem 19 ton trailer, Deere CX-15, Pottinger Hay mowers
Both of my 1211’s are new this year. One has 65 hours, the other has 170 hours. Both have tanks that drain unevenly.
I don’t understand it, either. Shouldn’t both drain about the same?
I don’t understand it, either. Shouldn’t both drain about the same?
OP
RjCorazza
Elite Member
Apparently it's not that unusual. Unfortunately mine is significantly worse than just uneven, the right tank will not provide fuel practically at all with both valves open. The problem started at around 1500 hours, and at 1800 I'm still dealing with it
I'll return with an update if I ever get it straightened out.
@90cummins : I have tested, cleaned, and replaced anyway the check valves.
90cummins
Veteran Member
My tanks drained evenly until I hit 300hrs. Filter from left tank was plugged so I replaced filter with one I had on hand & also cleaned that check valve.
10 hrs later it shut down because it was running on the left tank only so I had to get a couple gallons to get it back to shop.
I had ordered filters earlier so I replaced the right filter.
I fuel from an inside 275 gallon bulk tank. I have 3 filters in line, 20 micron water block, 10 micron spin on & a 2 micron final filter so dirty fuel is not getting into system.
I’m quite careful filling it but it must be introduced when I open tank.
90cummins
10 hrs later it shut down because it was running on the left tank only so I had to get a couple gallons to get it back to shop.
I had ordered filters earlier so I replaced the right filter.
I fuel from an inside 275 gallon bulk tank. I have 3 filters in line, 20 micron water block, 10 micron spin on & a 2 micron final filter so dirty fuel is not getting into system.
I’m quite careful filling it but it must be introduced when I open tank.
90cummins
Rmart30
Platinum Member
- Joined
- Jul 6, 2009
- Messages
- 612
- Location
- Alabama
- Tractor
- Currently have Kubota L4600HST, Kubota M7040, Kubota M8540, two Massey 265's, Massey 230, ...... Had Long 510, Mahindra 3510.Ford 4000, Deere 4230.
I run one similar to this to help catch particles.
any why choose the racor over one of the kubota bases? Lower micron rating?
Kubota BX models 1870 to 23s fuel tank strainer filter designed by Botaproducts | eBay
Fits: All BX models including 1860,1870,1880,2360,2370,23D,24,25D,2380,23s,2660,2670,2680 Will fit others with 3" fuel tank opening and at least 6" of unobstructed depth No crush design This strainer is tapered (cone shaped) to fit all BX series fuel tanks +++++THIS IS THE ONE THAT FITS+++++.
www.ebay.com
any why choose the racor over one of the kubota bases? Lower micron rating?
