VP44 Timing

[97' CTD]

Ok I pulled the flatbed's VP out today and when I pulled the gear off I cant remember if I had the key way exactly straight up or not so what should I do when I install this new VP is their a method to retiming a VP truck?
Im sorry I am VP stupid!
Brandon

 

[MD-LUCKY]

The only reason you need to keep the keyway straight up and down is so that the key in the pump itself does not fall into the engine when you try to insert the new pump.

The pump timing has nothing to do with the pump's orientation on the engine itself.

 

[97' CTD]

The only reason you need to keep the keyway straight up and down is so that the key in the pump itself does not fall into the engine when you try to insert the new pump.

The pump timing has nothing to do with the pump's orientation on the engine itself.

So the key u talk about is the one on the pump shaft right that little woodruff key?
Brandon

 

[kuntryboy369]

just line up the key on you pump shaft, to the keyway in the pump gear. if you have a standard key DONT let it fall off into your front cover (great big ol pain in the a$$ :doh. if i got lucky when i installed mine wrong. please correct me.

 

[kuntryboy369]

WAIT!?!?! you didnt pull the pump gear off? (you would have to take off the front cover) cause if you did, never mind droping the key in the fornt cover thing, that is a pain!!

 

[MD-LUCKY]

I guess I'm a little confused at how you pulled the VP myself.

How did you "pull the gear off the pump" ?

Is the gear still in the engine, or on a stand? I've never done them by pulling the pump with the gear out of the engine before...

 

[97' CTD]

I pulled the front cover cause my front seal is shot, then I pulled the gear off and it is laying in my garage, then I pulled the VP out.
Brandon

 

[MD-LUCKY]

Well, I can't think of any reason you couldn't put the gear back in with the pin pointing straight up and down. I don't know that the timing is determined by the gear orientation, which is why it isn't crutial to prevent the shaft from spinning when you are handling the new pump.

Where are all the VP experts hiding on this one?

 

[J.Keith]

Should be able to drop the gear in anywhere and then lineup the pump key.
The timing on the VP comes from the cam sensor so the tooth lineup dosn't matter. If I remember right there aren't any timing marks on the pump gear are there?

 

[ctd8999]

Well, I can't think of any reason you couldn't put the gear back in with the pin pointing straight up and down. I don't know that the timing is determined by the gear orientation, which is why it isn't crutial to prevent the shaft from spinning when you are handling the new pump.

Where are all the VP experts hiding on this one?

Ok to try to make this simple for you ( not trying to be a smart ass ) The key way on the crankshaft has to be straight up the o has to line up in between the two oo on the cam now the o on the cam lines up in between the two oo on the pump gear. When you are done all of your o's will be in a straight line. I hope this helps you out. Thanks Steve B.

 

[MD-LUCKY]

Ok to try to make this simple for you ( not trying to be a smart ass ) The key way on the crankshaft has to be straight up the o has to line up in between the two oo on the cam now the o on the cam lines up in between the two oo on the pump gear. When you are done all of your o's will be in a straight line. I hope this helps you out. Thanks Steve B.

So the initial timing IS determined by the gear, and the internal controls on the VP can't compensate if the pump gear is not correct?

What ratio does the pump gear spin compared to the crank gear?

This is good information for future reference.

 

[97' CTD]

Ok to try to make this simple for you ( not trying to be a smart ass ) The key way on the crankshaft has to be straight up the o has to line up in between the two oo on the cam now the o on the cam lines up in between the two oo on the pump gear. When you are done all of your o's will be in a straight line. I hope this helps you out. Thanks Steve B.

Can it be 180 out?
Brandon

 

[ctd8999]

So the initial timing IS determined by the gear, and the internal controls on the VP can't compensate if the pump gear is not correct?

What ratio does the pump gear spin compared to the crank gear?

This is good information for future reference.

2 revs on the crank makes 1 on the cam and the pump. One way to look at it is think of the VP-44 as distributor on a gas engine, instead of a spark it sends a shot of fuel, so the pump has to be in time with the crank and cam. Thanks Steve B.

 

[Diesel Freak]

All timing marks in the gears must match up. This means the crank to cam, and cam to pump gear.

The pump spins at 1/2 crankshaft rpm

 

[ctd8999]

Can it be 180 out?
Brandon

You have the front cover off, correct ? If so rotate the engine until the crank and the cam line up correctly, turn the engine to get the crankshaft keyway at 12 o'clock, look at the o marks if the o on the crank does not line up with the two oo's on the cam rotate the crank another 360 degrees. Now place the pump gear with the two oo's to line up with the o on the cam, the single o goes excactly between the two. this will put the timing mark for the pump straight up NOT THE KEY WAY. Thanks Steve B.

 

[97' CTD]

You have the front cover off, correct ? If so rotate the engine until the crank and the cam line up correctly, turn the engine to get the crankshaft keyway at 12 o'clock, look at the o marks if the o on the crank does not line up with the two oo's on the cam rotate the crank another 360 degrees. Now place the pump gear with the two oo's to line up with the o on the cam, the single o goes excactly between the two. this will put the timing mark for the pump straight up NOT THE KEY WAY. Thanks Steve B.

Great!
Brandon

 

[jktcummins]

This is what i think is wrong with my truck. And the timing is advanced from the gear. Causing the electronics to not be able to pic up the correct timing. Or it is trying to add extra timing. Casuing the it to cut out really bad. I still need to tear into mine and check it out.