i got a differnent combine and would like to now how to turn up the pump about 50hp, dealer says he would have to take the pump off and send it away, the problem is the turnaround will be to long.... i was told there is a cover on the end of the pump(four torx screws) to remove and inside the cover you must extend the stroke of the plunger, some say one turn some same half a turn) to get required power i am after... this sounds very vague so i was wondering if someone here knows more details on doing this job

anyone have diagrams or better info to read

there is also a wastegate that has an adjustment, can i use that to help me out

any help would be appreciated

thanks again

 

I think the P pumps are the same on both the B and C series engines. If so, adjustment of the fuel plate is what you are after to get more rack travel. See if the P pump pictures at the Cummins Database P Pump look anything like it.

Removing the rear cover and changing that adjustment affects the torque rise vs RPM and you can vary the governor arm travel, but it would be simpler to remove the AFC housing and adjust the fuel plate instead.

As far as the wastegate, I am surprised it has one in industrial applications. Most industrials have only fixed housings. You would need to observe boost, but for the small change you are looking for, you could probably just plug it off.

 

You must have just picked up a case axiel flow right? I would be careful turning it up too much, you might start slipping belts and the like. But , the tuner side of me says to crank it up. Sliding the fuel plate ahead a little bit and adjusting the gov arm should get you there.

 

thanks guys for the info, and yes it is a 2388 case combine, my last one was turned up and i was never disapointed, this one i am not sure, just thought a turn or so and all should be fine.... is the govenor arm the fine adjustment on the outside of the case, and yes i was thinking of installing a boost gauge and pluging off the wastegate all the way


by the way lil-dog we are have a diesel night at the track on july 22, in medicine hat, we should have lots of cummins and ford diesels out as well, some stock and some not, bring a few guys and we could have some fun

 

Your from medicine hat?! The guy i work for is out of burdett, thacker harvesting, Klatt farms out of Formost runs 10 2388 combines on their crew. I will be back up in the area this fall if you want me to lend a hand cranking that baby up.

 

I got your mail Fred, I was spreading the word around and my biz partner has a brother-in-law that may be down to race his S15 chevy in Super Stock I think...

 

well i turned it up one turn on the pump, and removed the wastegate line, before the boost was at 21lbs, now it is at 24lbs, any idea how much of a gain this would be in hp, thanks for the help

 

Do you know if it's a PES6P or PES6MW pump? Our Case 8920 and 8940 (matching set ) and 2366 have the MW governor; I've never torn into it to know if it's the same to turn up as the p-pumps on 94-98 Dodge's.

 

you sure it's not a VE pump? never seen anything on a P pump that you turn up one turn

 

Does the top of the pump (the AFC part) look something like this? http://potter.fotopic.net/p31784250.html

Thats a picture of the PES6MW from an 8940 I just took apart quick. It looks to me like all the adjustments are in the cover (with those pesky tamper-proof screws).

Here's two more pictures: the "plunger" or pin, with a notch in it: http://potter.fotopic.net/p31784251.html

and the pin in the pump that rides in the notch on the cover's pin: http://potter.fotopic.net/p31784253.html

There doesn't look like there's a plate, but I havent gotten very far in (yet )

 

no the pictures look different than mine, my door that has to be open to turn up the pump is located at the back of the motor side of the pump, four torx head bolts, once inside you can looseen the jam nut and turn in the allan hean adjustment in the middle, i called a diesel injection shop and they do lots of bosch p pumps, said what i was doing is correct for more hp

 

Fred, could you take a picture of your pump? A general shot would be fine, it doesn't need to be a closeup of any particular part. That will tell us for sure whether or not it's a p pump. I've never heard of a p pump without a plate, which you should find right under the afc housing.

 

Pictures would help. If it's not a PES6MW, my guess is a PES6A... If you check Scheid's site they have some pictures of inline Case pumps ( http://www.scheiddiesel.com/case_ih.htm ). What exactly do people mean when they say "p-pump"? Just P7100's? And where on the pump should it say P7100?

 

I dunno where or even if it says p7100, I just know what one looks like.

 

I'm just curious, since the P7100 on our grain truck says it's a PES6P.. I think the part after "PES6" is just the type of governor used on the pump, but I'm not sure. The governor arm on P7100 rides against the plate, right? In that case, maybe the different styles of governor don't have plates... Any Bosch pump experts out there?