Hpfp strips down

[White_monster]

Hey guys. Had a spare hpfp kickin around so I figured I'd take it apart. Here's a few pics of the internals of the pump. These pics should shed some light on what's inside.

Volume control valve

Pressure control valve and pump piston

Internal shaft of the pump

Gerotor pump and ring

Enjoy guys. The ring around the gerotor pump is flipped for reverse rotation which makes it easy to replace a pump if you run a twin pump kit using a k16 pump.

 

[Dzchey21]

Looks simple enough

 

[Jhaddox]

I really thought there would be a lot more internally on one

Doesn't seem to bad

Sent from my SCH-I535 using Tapatalk 2

 

[Dmstrucks02]

Pretty interesting, me and a buddy were just talking about these tonight

 

[White_monster]

Ya it's pretty simple actually. This pump has some rust in it but its all cleanable. Going to contact Siemons about getting a new PCV for it. Looking online at other siemons pumps leads me to think we can get them since every pump had the same valve and connector on them.

 

[Super08Duty]

Pretty simple inside. I'm guessing elites pump upgrade will be pretty simple.

 

[78f100]

Thanks Shane, that clears up some questions I had about them! Reversing one looks pretty simple.

 

[White_monster]

Reversing it is really simple. 3 Allen bolts and flip the ring.

 

[blk350on20s]

I tried 2 years back to get stuff from anyone when i pulled my pumps apart. Ended up just swapping stuff to a different pump. Left countless messages and tried a ton of places. Hopefully its different now that theyve been out longer.

 

[pog]

did my old hpfp finally come to use? lol

 

[madman1234509]

Lubeowner had a vid on youtube of how to switch it that has been out for a while. It literally takes 2 minutes if the pump is sitting right on front of you on a bench. Also it goes to show you how small the hole is that fuel passes through to get into the hp fuel lines, rails and injectors. Makes me wonder how necessary running huge 8AN and 10AN line is.

 

[UpstateDieselGuy]

Very Interesting!

 

[Jarrod B]

So which part goes when you get the shavings?

 

[713Diesel]

So which part goes when you get the shavings?

I am interested in what goes bad as well. Stupid question........ Do you have to lift the cab to take the pump off?

 

[SEABEE08FX4]

I am interested in what goes bad as well. Stupid question........ Do you have to lift the cab to take the pump off?

No but it makes life easier.

 

[jdgleason]

Lol get bored today?

 

[Dzchey21]

Most likely the pistons that's the super right tolerance that makes the high pressure. The vane pump in front isn't that close tolerance

 

[Erikclaw]

I expected the internals to be different than that too. Does seem pretty simple. What would II modify to make theirs and why the failure rate? Heavier spring and bigger outlet hole? Just guessing.

 

[makaveli200369]

Sorry to revive this page from the past. This pump being so simple how do those little pistons get rail pressure to 25,000? I've always wanted to know how that works.

 

[capt dong]

What fails on these pumps that require replacement?