B7500D losing power

[R Geiger]

My B 7500D will lose power, push in clutch and rpms will recover. This past summer I had the injectors rebuilt and the tractor had been running great. When I had the injectors out, I removed the fuel tank and flushed it out real good, inspected the fuel lines and replaced the fuel filter. It acts like it is running out of fuel. It died this morning and restarted right up and ran good.
any Ideas?

 

[miner09]

Sometimes the injection pump is problem.

 

[R Geiger]

Sometimes the injection pump is problem.

I am hoping not. last few days it has not had the problem. Hoping for the best. Not ruled out something in tank blocking fuel, got bore scope coming will drain and take a look. only has the problem when I am going up a hill. Would think an injector pump would have the problem all the time. Thanks for the reply.

 

[Blackhole49]

I am hoping not. last few days it has not had the problem. Hoping for the best. Not ruled out something in tank blocking fuel, got bore scope coming will drain and take a look. only has the problem when I am going up a hill. Would think an injector pump would have the problem all the time. Thanks for the reply.

Didn't respond to the original post because you said you had the tank off, cleaned and lines inspected. Did it have a screen on the end of the suction line in the tank? Did you replace the suction line in the tank. If you fill the tank right to the filler neck, does it still quit going up hill?

 

[R Geiger]

Didn't respond to the original post because you said you had the tank off, cleaned and lines inspected. Did it have a screen on the end of the suction line in the tank? Did you replace the suction line in the tank. If you fill the tank right to the filler neck, does it still quit going up hill?

From looking at it, it appears that there is no line in the tank. Parts diagram does not show one in the tank. It looks like it is gravity flow to the filter, then to the mechanical fuel pump then to the injection pump. It has not acted up with the tank full or nearly so. the way the tank is built, you cannot see into the tank. got bore scope coming. I thought I got the tank clean when I had it off.
Thanks!

 

[Blackhole49]

From looking at it, it appears that there is no line in the tank. Parts diagram does not show one in the tank. It looks like it is gravity flow to the filter, then to the mechanical fuel pump then to the injection pump. It has not acted up with the tank full or nearly so. the way the tank is built, you cannot see into the tank. got bore scope coming. I thought I got the tank clean when I had it off.
Thanks.

I'm wondering if the mechanical pump is weak and when the tank is low enough gravity isn't getting it to the injection pump on a hill. Amazon sells a pump for that tractor for $30. https://www.amazon.com/16241-52032-16241-52030-Kubota-B1700-B7500D/dp/B09633HCF3

 

[R Geiger]

I'm wondering if the mechanical pump is weak and when the tank is low enough gravity isn't getting it to the injection pump on a hill. Amazon sells a pump for that tractor for $30. https://www.amazon.com/16241-52032-16241-52030-Kubota-B1700-B7500D/dp/B09633HCF3

I was thinking along that line, will see what happens when I get the fuel level down. Thanks for the link!

 

[R Geiger]

Found my problem, It turned out to be a small rock in the inlet port of the filter housing!