Kubota zd21 losing power

   / Kubota zd21 losing power #1  

zboyter

New member
Joined
Apr 25, 2013
Messages
1
Location
McCormick, SC
Tractor
Kubota/ zd21
Hey. I have a Kubota zd21 with 700 hrs. The problem that I am having is when I try to go up a hill the motor will bog down. I then have to stop for about 10-15 seconds and the mower will regain power. It runs like a new one unless I try to go up a hill. I am the original owner and haven't had any other problems. I did replace the fuel filter but that didn't fix my problem.

Thanks for your time
 
   / Kubota zd21 losing power #2  
Have you changed your air filters? Diesels need a LOT of air
 
   / Kubota zd21 losing power #3  
Had the same thing on a ZD28, replaced filters and electric pump. Didn't help. Found it was some dirt partially plugging the line from the tank to the first filter. Blew it out backwards and been fine ever since.
 
   / Kubota zd21 losing power #4  
I have the same mower and had the same problem... changed all the filters, checked wires, fuzes... much frustration no answers

It ended up being the tube that brings fuel up from the tank... pull tank off... pull tube out... stick hanger down tube and presto magic... I had a new mower... (warning... you can try compressed air which will cause you to think you solved it but it will probably require a hanger.

hope it works
 
   / Kubota zd21 losing power #5  
Found it was some dirt partially plugging the line from the tank to the first filter. Blew it out backwards and been fine ever since.

I am willing to bet this is your problem also. If you do have crud in the bottom of the tank there is a second step to the compressed air I would suggest. After you blow the lines clean use a shop vac in the tank to remove most of the crud. A short piece of old water hose (or any other hose for that matter), with some duct tape to connect it to the shop vac, will help you get in the hard to reach places inside the tank.
 
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   / Kubota zd21 losing power #6  
I have a ZD21, they have two fuel filters. One is below the tank and the other is after the in-line fuel pump. The one below the tank is behind the battery, hard to get to and replace . If not the filter then Bigkrank probably nailed it.
 
   / Kubota zd21 losing power #7  
Where is the first fuel filter location on a 2006 Kubota ZD 21
 

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