case 580k

my injector pump has went out wondering if any of you guys know the correct way to set timing for removal of pump on this engine it has the bosch pump cummins engine 4cyl thanks

Not sure exactly which pump yours has, but a 4BT Cummins with an inline injetion pump has a plunger located directly below the front of the pump where it mounts to the engine housing. Turn the engine over slowly by hand while pushing in on the plunger. You will eventually feel it drop into a hole on the back of one of the timing gears. Once it drops in place everything is then in time. Now looking at the front left side of the pump (viewed from the rear), there should be a bolt tightened down on a little tab. Sometimes the tab is connected with a wire, somethings not. Anyway back off the bolt just enough to remove the tab, then tighten the bolt back down. With the tab removed the bolt is allowed to go in far enough to lock the internals in the injection pump in time...so save the tab, you'll need it when you go back together with it. Once everything is locked down I'd suggest that you pull the plunger backout of the hole it lines up with. I say this because if, while removing the pump, something gets turned even a little bit it will break the tab off.... BTDT.... Just make sure you put it back in place before you start reassembly to insure everything is still in time....From there unscrew the plug on the front cover, and go from there to get the injection pump off of the engine.

Good luck and I hope this helps.

NCWayne nailed it, only thing to add is on reassembly use 15 ft lb pretorque on pump nut with engine locating pin in cam gear, then can safely remove pin and release pump lock bolt. Can now do final torque on pump nut without damage to pin if engine should turn.

i turnes engine over by hand and pushed button at same time never would lock in so i removed #1 valve cover till both valves were closed then i removed pump i alkso removed #4 valve cover one closed one open. how bad off will i be

How far off you might be is hard to say, but like the old saying, "A miss is as good as a mile". In other words when you get the pump back from the shop they should have it timed exactly but, obviously, the engine will not be timed exactly. That being the case, wether your 5 degrees off, or 15 degrees off, or 180 degrees off, the pump will be out of time with the rest of the engine and it will not run right, or possibly at all.

My suggestion would be to pull the plunger assembly and get a new one if the small part on the end is broken off. Too, I have seen them be just be stuck enough that they will not push out and engage the timing hole without literally driving it out with a hammer. In that case, simply pull the assembly and free up the one that's there so it will push in and engage the timing hole like it's supposed to do.

Based on what your saying you did, you ought to be close, so once you have the timing pin situated rock the engine back and forth while pushing in on the plunger til it engages with the hole. Unfortunately that is the only way your going to have any guarantees as to wether the engine will be in time and run when your done.

The injector pump is keyed to the drive gear and will only fit the one way,the secret of success is not to let the drive gear out of mesh with the cam gear, the timing pin in the hole ensures to keep the gear in place,there are a couple of tools available from Case or Cummins that make the removal easy,a puller to break the taper and the engine turning tool,with everything removed from the pump locate the timing hole in the gear by turning the engine with the tool,when the timing pin will go in the drive gear pull it out again and hold the flywheel with the turning tool and undo the pump shaft nut (this saves the timing pin getting bent) till it is flush with the end of the shaft,put the timing pin in again,bolt on the puller and break the taper,take it off and the nut,undo the pump mounting bolts and pull the pump straight back,no jerking or rocking as you do not want to lose the key,tip when replacing the pump a smigen of super glue will keep the key in place,when tightening the shaft nut remove the timing pin and hold the flywheel with the tool,think it is about 48 Lb Ft
AJ

Turn the engine until the #4 exhaust valve just closes and the intake just starts to open. Right where the x closes and intakes starts, just starts to open is very close to tdc.

Why bother disturbing the top of the engine when there is no need to,the timing pin holds the gear in sutu as AJ says and there is no need or adavantage to go removing the rocker covers whatsoever,if the gear gets out of mesh its the front off to retime it.
P