You don't need to pull the complete injection pump/housing to replace the individual units if that is the problem. Kind of unusual to have the pumps completely fail.
Replacement pumps 2S7264=8M2701=5L2972 run anywhere from $68 on up, depending on source.

"Rome wrote:

I was just going to mention try some of the other nozzles and check them, heck you can hook all the nozzles up out away from the engine, turn it over and see what they do. Release the compression lever so she spins over fast and have the throttle set half back. Stay away from the spray though if they do work. Show us a video if you can when turning it over.

Will do....Thanks for your help...

"Old wrote:

You don't need to pull the complete injection pump/housing to replace the individual units if that is the problem. Kind of unusual to have the pumps completely fail.
Replacement pumps 2S7264=8M2701=5L2972 run anywhere from $68 on up, depending on source.

I would agree, but to my eye and ears there has always been a fuel issue... Rack was stuck. Freed the rack was ready for it to fire...No go...


I will tomorrow you to the machine take them all out ie injectors... Put under plates and video what is going on... If more then 3-4 pumps are bad I will take in pump to get it checked out.... The bottom end ie camshaft looked very good to me... Maybe I can just get away with pump or pumps depending on findings... I will post tommorow... Thanks Old Magnet for all your support and help...

"gvanhouten" wrote:

Okay so yesterday I went back and took out Injector #1 and took it out of the body and re attached to IP and put a paper plate underneath and there was zero spray it just dripped. Fuel of course was on through governor rack... It did not seem to atomize. I did it multiple times... I went and made sure the injector nozzle was tight... Still did not Atomize... I stopped at #1 as I wanted to see if doing a test with an injector not torqued down would be okay... This tells me either first I am doing it wrong.. Or second their is a problem with the Jerk pump... Please let me know your thoughts...

Again, did not atomize at all just dripped diesel out... Screen on injector nozzle was clear no debris.. They are brand new....

Before you start buying pumps ,I would take the injectors to a diesel shop and have them tested .
I may be wrong but i did not think an injector should open until it reached the right pressure

"ianoz" wrote:

Before you start buying pumps ,I would take the injectors to a diesel shop and have them tested .
I may be wrong but i did not think an injector should open until it reached the right pressure

I agree, they should not drip. Unless the drip is from the connection and not the tip.

Perhaps also put one back to how you found it (original nozzle ect.) and try that. Won't cost anything and you never know.

"ianoz" wrote:

Before you start buying pumps ,I would take the injectors to a diesel shop and have them tested .
I may be wrong but i did not think an injector should open until it reached the right pressure

The nozzles are brand new from Caterpillar... This Injection Pump is a volume type pump... When it cranks it should mist the injectors or Atomize... You can hear them cracking ie when pressure is reached... But there is not a spray pattern. So basically without it Atomizing at the injector it floods the cylinder and does not ignite.. Ever try putting a match to straight diesel? It does not ignite it is not volatile like traditional gas... The injector should work... As I stated earlier I will remove all six and see what we have... Meaning if any Atomize... The previous owner always stated it was a hard starting D9 and clearly she does not want to start... We are getting plenty of fuel at the injector but not the kind that will ignite the cylinder. Looking at the video you can clearly see that there is not enough smoke which would also indicate a fuel problem... Hence the reason I took off the IP multiple times... Just never performed the test as suggested before... My mistake and need to follow each step before going on to the next...Anybody else can chime in here if I am off about injector Atomizing. If it is pissing then Houston that is a problem.

Back to comment #181, you said you took the injector out of the body and attached it to the pump, do mean you took it out of the prechamber? The fuel line should be attached to the pump then the line to the body then the injector nozzle on the body. Tighten the fuel line to the body but the nozzle should just be snug tightened. Even a week pump should have enough pressure to atomize the fuel out of the nozzle. Was you testing with the pump assembly on the engine or off and turning the pump cam over by hand?

"Rome wrote:

Back to comment #181, you said you took the injector out of the body and attached it to the pump, do mean you took it out of the prechamber? The fuel line should be attached to the pump then the line to the body then the injector nozzle on the body. Tighten the fuel line to the body but the nozzle should just be snug tightened. Even a week pump should have enough pressure to atomize the fuel out of the nozzle. Was you testing with the pump assembly on the engine or off and turning the pump cam over by hand?

Hi Rome,

I put back the IP and yes took #1 injector complete assembly out of the prechamber and attached to fuel line #1... Yes the governor was open and IP pump and fuel transfer pump and all was connected and done correctly.. The remaining 5 injectors where inside the prechambers torqued to 105 ftlbs and only #1 was out attached and I cranked her over with my remote starter and watched... Nothing atomized just dripped... I will post new video with all 6 lines out and see what we get...