I removed injector pump from 4020 to get rebuilt. I timed tractor before removing injector. When I went to install pump I couldn't get injector down last 1/4". I thought that brass bushing was wrong size, but guy that rebuilt it said that it was the same size as one that came out. Is there a special way to get this into tractor block?
- Thread starter Neal Ochs
- Start date
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Is inj pump driveshaft installed correctly in inj pump?
Dieseltech
Well-known Member
- Location
- Akron, Indiana
I'm with TX Jim, is the pump drive shaft in correctly? Dot on the inside shaft end should align with the dot in the rotor groove inside. I ALWAYS check that when tearing down any 3010-20 and 4010-20 pump during repair. Reason being is there's a chance if the engine oil pump is installed 1/2 turn off, then the pump shaft WILL get pulled and turned 1/2 turn also IF the mechanic does not feel like dropping the pan and correcting the oil pump mistake. Don't see this often, but have a few pumps that have come in with the shaft 1/2 turn off..
Okay, the way I understand it you did time the pump, by removing the timing window on the pump,,and you are certain that you had the 2 marks lined up,,but "maybe" it was a little scratch instead of the timing mark??..Now maybe you lined the TDC mark up on the fly wheel,, and it could have been 180% off??.. So to prove your self, look down into the opening where the pump goes there will be a "V" mark on top of the oil pump shaft, this should be pointing in towards the crank shaft, if it's not rotate the flywheel one full turn and line the TDC mark up again, now line the marks up in the pump window again and see if it will drop in correctly..
Tim I did pull cover off injector pump and lined up the two marks. If you turn pump half turn there is a flat spot ground on plate that turns. I assume that the two lines are the two that needed lined up, instead of the line and flat ground mark. I think the guy that rebuilt the pump has the shaft half a turn of. I didn't think that the shaft being 1/2 turn off would affect the pump from going in.
Dieseltech
Well-known Member
- Location
- Akron, Indiana
If the timing lines were aligned before removal, then there's a good chance one or more things are wrong, shaft in 1/2 turn off, retainer plate installed 1/2 turn off, and/or engine oil pump installed 1/2 turn off at some time, and shaft was installed 1/2 turn off on purpose to correct the oil pump mistake. That's why I look at the end dots at tear down. Shaft MAY have been in wrong, but in correctly now with the dots aligned..
This is first time I have taken injector out of diesel. I didn't know, when I remove pump that there was a mark on the two shafts. This tractor has had a lot of work done on it before I bought it. It is possible that oil pump could be off. Will check all this out.
Thanks for all your help.
Thanks for all your help.
Dieseltech
Well-known Member
- Location
- Akron, Indiana
You can do a quick check of the pump timing line by aligning the # 1 cylinder outlet port with the rotor port. Looking at the pump transfer pump inlet end # 1 port is just right of the lower end cap test port plug, about the 5 O'clock position with the inlet being 12 O'clock. With the rotor port in sight then the timing lines will be visible in the window if pump has the retainer marked and assembled to the rotor correctly. If not visible the retainer is marked/on wrong. Lines will not be perfectly aligned if correct as pump is timed end of injection, but it will be in the window for a quick check.
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