Vp 44 r&r

[SAndreasen]

How important is it to be on tdc ? I had one hired done and I looked and he’s not on tdc . New pump just got here .

 

[NIsaacs]

The recommendation for TDC is not for timing purposes, it is only to insure the pump key is up, so you cant lose it as easy. The only timing involved is the right key for the pump. The ID tag on the pump will list the number, just confirm the key is the same. They are a 3 digit number starting with zero, such as "031".

This is assuming the pump gear has not been messed with and is in time with the cam gear.

 

[SAndreasen]

The recommendation for TDC is not for timing purposes, it is only to insure the pump key is up, so you cant lose it as easy. The only timing involved is the right key for the pump. The ID tag on the pump will list the number, just confirm the key is the same. They are a 3 digit number starting with zero, such as "031".

This is assuming the pump gear has not been messed with and is in time with the cam gear.

thank I won’t worry about it then. Is there any harm in putting a dot of loctite on the bottom of the key

 

[Gearclash]

When I replaced my VP44 I don’t recall positioning the crank at #1 TDC, nor did I put any Loctite on the key. As NIsaccs pointed out, be sure the key is correct for the pump you are installing. The old key may not be the correct part. I’m pretty sure the key that came with my new pump was different than the old key.

 

[BigPapa]

I wouldn't put anything on it.

 

[rkressg]

Rotate the engine around to TDC before putting the pump back in. Just ensure the gear is pushed back so it doesn't bind on anything when you turn the engine. Should be super easy, it does not have to be exactly at TDC, as mentioned above, it is just to help ensure the key doesn't fall into the timing gears when installing the pump.

All of the VP44's I have seen recently look to have some type of glue under the key to hold it in place and prevent this issue, but better safe than sorry, pulling off that cover plate to get a dropped key out is not an easy task.