Injection pump flow rate

Cburns5042

New member

Equipment
Light power plant with an D1105
Feb 20, 2024
2
0
1
Eufaula OK
I have a D1105 in a light power plant the engine was having issues starting, I determined the injectors were the issue. I bought new injectors from kubota and installed them. When i was replacing the injectors, I saw the fittings on top of the Injection pump turned. I took this as them being loose. I tightened them down. After I did that, I had zero fuel coming from the injection pump. I later found out that those fittings determine flow rate and there is a procedure for doing that. How ever I cannot find anywhere the procedure on how to do that, can anyone help me.
 

Russell King

Well-known member

Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Jun 17, 2012
4,658
997
113
Austin, Texas
Can not help you other than to suggest you send the pump out for professional repair to someone like THIS or find a reputable repair shop locally

If you remove the pump there are (probably) shims under the mounting surface that must be kept and installed with any pump.
 

North Idaho Wolfman

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Staff member
Lifetime Member

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
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Sandpoint, ID
Take or send the pump to be rebuilt.
Oregon fuel injection is my go to.
It's not a fuel amount adjustment, it's a fuel curve adjustment.
You need the proper test equipment to set them properly.
 

Cburns5042

New member

Equipment
Light power plant with an D1105
Feb 20, 2024
2
0
1
Eufaula OK
I spoke to a kubota technician he said that a new one comes without being set and you have to set them and there is a set procedure to do that. He no longer works for Kubota and does not have the access to the information any more.
 

D2Cat

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Equipment
L305DT, B7100HST, TG1860, TG1860D, L4240
Mar 27, 2014
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40 miles south of Kansas City
The IP you would get from the company the two previous posters mentioned will come ready to bolt on to your engine, and ready to use.
 

North Idaho Wolfman

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Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
28,623
5,074
113
Sandpoint, ID
I have never heard of a tech setting a Injection pump fuel curve???

Get the WSM for the engine, if I'm wrong and there is a procedure to do it in the field, it will be in there.
 

lugbolt

Well-known member

Equipment
ZG127S-54
Oct 15, 2015
4,835
1,588
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Mid, South, USA
if you ordered a new pump from kubota, it's fully set and ready to go. Been that way for decades unless things have changed in the last 3 years or so, which I doubt.
 

whitetiger

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Equipment
Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
Nov 20, 2011
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Kansas City, KS
I spoke to a kubota technician he said that a new one comes without being set and you have to set them and there is a set procedure to do that. He no longer works for Kubota and does not have the access to the information any more.
Here is a PDF of the injection pump page from the Kubota WSM.
You need to send the pump to a Kubota-authorized pump service shop. Oregon Fuel Injection is one of the best.
 

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