Engine/Transmission (1994 - 1998) Rack travel resistance??

[DSchell]

Hi guys,

First post here, would like to start by saying that this site ROCKS! I really enjoy reading al the posts and to learn from them.

While I was reading about the P7100 tweaks I was playing with my own 160 pump to see where all the stuff is located and to see how they work. It's from a '95 engine that I'm building for a '81 blazer.

I noticed that the rack does not travel freely forward when I pull the throttle linkage(with shutdown lever up). I have to help it a little to get it moving, same thing when I release the throttle. The rack spring does not push the rack back by itself. Is this normal for a pump that's not turning??

Last time this pump pumped is at least one year ago, but it should be OK.



Thanks for any help/comments.



Daan

 

[bmoeller]

It is probably OK. The governor on the rear of the pump is most likely the reason for it.

 

[Vaughn MacKenzie]

Hi DSchell, welcome. It sounds normal to me, at least traveling forward. When I push down on the pedal of my '96 and '98 when they're not running the initial travel is very stiff.

 

[DSchell]

Thanks!!!

Thanks for your replies and the welcome!



It's just that... ... it doesn't feel right. I'm not sure if I explained the situation right the first time:

I have the AFC housing off and the torqueplate removed. I'm now looking into the governor. The shut off lever is up. When I pull the throttle, I can see a spring trying to push the rack forward to turn the plungers, but it's just not happening! If I take out the rack end plug at the front of the pump and pull the rack, then it slowly moves forward. Same thing for releasing, rack does not return unless I help it.

Sorry if I wasn't clear enough the first time, but is this also OK for a non running pump?

Thanks again



Daan

 

[Dieseldemon]

Yes its normal