1120 case ih injection pump

deene · Nov 1, 2015

i bought a non running 1120 and have done everything I know to get fuel out of the injectors,,, it has an electric pump that's working and provides plenty of fuel to the pump..but nothing out of it...electric solenoid is working and holding as it should..kinda wondering if theres a diagram that shows an exploded view of the pump itself to review..its a mitsubishi engine..the fuel goes in on top right next to where the outlets are for the injection lines..pump housing looks to be cast into the block as its also where the oil filter is and the oil pressure sending unit..it has 2 plates that have 4 screws holding them on..one on the side and the other is the aforementioned top where the fuel goes in and injector lines come out..so before I take them off I would like to know whats in there..thanks for any and all advice

Bob · Nov 1, 2015

I would suspect plunger barrels/control sleeves/rack/governor stuck in the no-fuel position.

At the link below, click on "injection pump" or "governor" to see all the parts involved.

The "rack" protrudes from the main IP casting shown in the diagram to the right, and isn't shown separately.

The generic diagram below shows the rack and how it connects to the control sleeve to rotate it and control fuel delivery rate.

Yours is likely SIMILAR (X 3) but not EXACTLY as shown.

<img src = "http://www.splashmaritime.com.au/Marops/data/text/Med3tex/Engpropmed2_files/image022.jpg">
Fuel system

deene · Nov 7, 2015

thanks so much this was exactly what I needed to help with my understanding of how it worked..thanks again

1120 case ih injection pump

deene

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Bob

Well-known Member

deene

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