IH 966 Injector pump

craigreavley · Dec 13, 2011

What is the procedure for changing an injector pump on a 966. I see they are about 1000 dollars for a rebuilt one. It is timed to the engine. Is there a procedure checklist somewhere for changing the pump? It looks like you could get it out of time 180 degrees or more if installed incorrectly.

Anonymous-0 · Dec 13, 2011

I was about to post the same question as I need to change one this week too. My I&T manual should get here today. Any thing in particular to watch out for? Special tools? I'm working on one that has sat for several years. Cleaned out the fuel tank since the cap was missing and found that the return fuel standpipe had broken off of the elbow, didn't think much about it, just fixed it and went on. Turns out the tank got water in it and the water found the broken return elbow and found it's way to the pump, froze and broke the pump housing.

the tractor vet · Dec 13, 2011

My way may not be the wright way but this is how i do it . I remove the left hood and left ft. side panel then i sneek the valve cover off and remove the timing cover off the right side of the bell housing and reinstall the timing pointer and turn the engine to the timing marks and see if i have # 1 on The timing set . IF both intake and exhaust are closed and i am at the correct timing on the flywheel then i remove the pump and i also remove the plug on the pump to check and see where it is setting . When the pump goes back on as long as no one moved the engine it all falls back into place and now is a good time to adjust the valves so two jobs get done at once. BUT like i say this is my way .

Anonymous-0 · Dec 13, 2011

Thanks TV!

Anonymous-0 · Dec 13, 2011

You are correct. Pump cam turns crankshaft speed, Head is camshaft speed. To see if pump is on cyl 1 or 6, remove 4 screws on side cover. Turn engine until pump hub mark aligns with pointer. Look at head drive gear for groove cut on gear side.If gear mark can be seen, pump is on cyl 1, if not, then pump is on cyl 6. If you have any questions, call 574 893 4172 after 7 PM.

Owen Aaland · Dec 13, 2011

It really doesn't take any longer if you never worry about getting the engine on number one rather than number six when you pull the pump. You have a 50% chance of getting it right and if you don't it doesn't take any longer to change it than it does to determine the correct cylinder before you remove the pump.

Line up the timing marks on the flywheel, pull the pump and install and time the new one leaving the front cover off. Bleed the lines and try to start the engine. If it doesn't start easily remove the three bolts in the timing gear and rotate the pump drive shaft one turn and install the cover.

A lot of these engines will start if the the pump is 180º off but not easily. They won't have much power and will smoke a lot when they are timed on the wrong cylinder..

pete 23 · Dec 14, 2011

Seeing as how getting a lot of different suggestions I will throw in here also. What I do if pump has been working, not totaled, is line up to correct timing mark, remove pump drive front cover, remove three bolts on pump drive, remove all six injection lines from head of pump, pull throttle wide open, turn pump with wrench and see which outlet pump injects fuel. Then you know which cyl you are on. The reason I developed this method was we had a lot of problems with those pumps under warranty and you could not break a seal or it voided warranty. When out of warranty, I just take off the side cover.

IH 966 Injector pump

craigreavley

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Anonymous-0

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the tractor vet

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Anonymous-0

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Anonymous-0

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Owen Aaland

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pete 23

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