+- STD (https://www.superturbodiesel.com/std)
+-- Forum: Maintenance (https://www.superturbodiesel.com/std/forumdisplay.php?fid=22)
+--- Forum: General (https://www.superturbodiesel.com/std/forumdisplay.php?fid=4)
+--- Thread: OK, I need an injection pump element 101 lesson... (/showthread.php?tid=2517)
OK, I need an injection pump element 101 lesson... - E300TSC - 04-14-2011
So, I'm just going to go wild and swap my pump elements myself. I have a total of 12 cam rollers of various sizes to adjust the port closure/start of delivery.
Should I:
1. Just swap the elements and leave the cam rollers the same.
Or
2. Swap the elements and choose a selection of cam rollers that is even as possible.
I realize this is just blindly swapping parts but I'm looking for a best course of action to reach a baseline.
Now, my second question:
If the pump has a balanced delivery but the port closure/start of delivery is wrong, will adjusting the port closure/timing effect the volume from that element?
How about the reverse. If the port closure/start of delivery is balanced but the volume is not, will balancing the volume effect the other adjustment?
Thanks!
RE: OK, I need an injection pump element 101 lesson... - garage - 04-14-2011
Wich elements are you going to swap in?
RE: OK, I need an injection pump element 101 lesson... - 300D50 - 04-14-2011
If your port closeure is not exactly phased, your per-cylinder timing goes off the wall, which is a bad thing.
If your quantity is off, you get mismatched power, excess vibration, and etc. Also a bad thing.
Changing a plunger/barrel assembly nukes both of those adjustments.
Best bet is to get the Bosch MW 6 cylinder service manual that's floating around, read it, and get a feel for it all.
There's also some service training slideshows floating around on the governor, and what it all does. With luck, we'll have a less grey-area resource on the governor soon.
RE: OK, I need an injection pump element 101 lesson... - E300TSC - 04-15-2011
This is the electronic pump so no governor to worry about. I'm familiar with the individual effects of each of the 2 adjustments. My main questions besides 1 and 2 above are:
Does the port closure adjustment effect quantity and vice versa?
If so, how?
RE: OK, I need an injection pump element 101 lesson... - 300D50 - 04-15-2011
I'm not sure if they do, but you don't want to try running with bad phasing, at best performance would be crud, at worst, it could cause damage.
RE: OK, I need an injection pump element 101 lesson... - winmutt - 04-19-2011
Port closure adjustment, this is rotating the element? If so that controls volume. Height controls timing. Atleast on the MW pump. I assume it is much the same on the M as the basic operating principal is the same.
RE: OK, I need an injection pump element 101 lesson... - 300D50 - 04-19-2011
Dur, I got them mixed up...
RE: OK, I need an injection pump element 101 lesson... - winmutt - 04-19-2011
I have 2 spare broken pumps. Planned on learning to do it myself as well.
RE: OK, I need an injection pump element 101 lesson... - E300TSC - 04-19-2011
The height/roller size controls timing. Rotation/position of the holders on the rack determines volume. I'm trying to figure out if one effects the other and to what extent.
I'm leaning towards leaving everything set as is and trying it out for size.
I'm also building a simple test rig for these two adjustments so eventually, I'll be able to adjust them myself.
RE: OK, I need an injection pump element 101 lesson... - winmutt - 04-19-2011
And you are taking many many many pictures right
RE: OK, I need an injection pump element 101 lesson... - winmutt - 04-27-2011
I started dismantling one of my pumps last week. I got the governor off which was amazingly easy.
RE: OK, I need an injection pump element 101 lesson... - dieselmeken - 05-06-2011
Time for me to do a video on the M-serie?
RE: OK, I need an injection pump element 101 lesson... - E300TSC - 05-06-2011
Yes! That would be very helpful! Here are some pictures I took of the tools I made to service the pump. They are just rough prototypes so don't be too hard on me!
Tool for compressing element springs/rollers:
![[Image: P4120177.jpg]](http://i3.photobucket.com/albums/y71/kartek/Mercedes/P4120177.jpg)
![[Image: P4120175.jpg]](http://i3.photobucket.com/albums/y71/kartek/Mercedes/P4120175.jpg)
Stabilizer for element locking pins:
![[Image: P4120178.jpg]](http://i3.photobucket.com/albums/y71/kartek/Mercedes/P4120178.jpg)
RE: OK, I need an injection pump element 101 lesson... - George3soccer - 05-08-2011
Pretty awsome stuff, kep us updated all the time. Would love to hear from Dieselmeken and from you, e300TSC.
RE: OK, I need an injection pump element 101 lesson... - winmutt - 05-09-2011
So when you gonna start offering a service state side
RE: OK, I need an injection pump element 101 lesson... - E300TSC - 05-10-2011
Ha! Maybe for the electronic pumps since there's much less "art" involved in the swap. No governor or other settings to worry about.
RE: OK, I need an injection pump element 101 lesson... - winmutt - 05-10-2011
? Dont you still need to adjust the individual fuel quantity on the rack?
RE: OK, I need an injection pump element 101 lesson... - E300TSC - 05-10-2011
Yes, the quantity and the individual timing. I can do both but I need to devise a test rig.
RE: OK, I need an injection pump element 101 lesson... - E300TSC - 08-28-2011
Continuing on with this project, I have another question. When checking timing, how much pressure dues it take to "crack" the delivery valves and cause fuel to drip?
RE: OK, I need an injection pump element 101 lesson... - dieselmeken - 09-29-2011
(08-28-2011, 06:40 AM)E300TSC Continuing on with this project, I have another question. When checking timing, how much pressure dues it take to "crack" the delivery valves and cause fuel to drip?
App 25 bar inletpressure.