Cummins C-Series - Type QE296C. Explain "governor" - Competition Diesel.Com

4x4dually · 07-17-2019, 02:44 PM

So I bought this reman compressor for the 8.2L. Apparently I need to buy an unloader valve and a 'governor' for it. I understand the unloader part. What is the governor? Isn't that inside the compressor? If it is external, how the hell does it tell it when to pump or not? Makes no sense. Anyone explain?

3558186X - Remanufactured Cummins/Holset Style Compressor - Haldex product

I'm trying to figure out what parts I am missing. Apparently I need an inlet assembly too? All I got was in the picture.

biggy238 · 07-17-2019, 03:14 PM

It sets the cut in and cut out pressures so that the compressor is only under load when needed.

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4x4dually · 07-18-2019, 06:59 AM

Wildman sent me some pictures. It appears there are several versions. One that mounts on top of the head that looks like it belongs and one like the first one above that mounts up top but on the outside. Any reason it can't be mounted remotely?

And yes, I did move the relay valve for the front brakes to the side on one frame rail......after that I was wondering if it was placed in the center for a reason. I guess it is....but we are gonna try it. The truck always pulled to the right on brakes anyway...maybe it will correct it back straight.

*Snedge* · 07-18-2019, 07:16 AM

You should, but don't have to, mount the air governor on the compressor. It'll mount directly to the back side of that compressor.
The one you want is a model D-2. Internal to the compressor is the unloader valve.

Air GOVERNOR - YouTube

4x4dually · 07-18-2019, 07:20 AM

Quote:

Originally Posted by Snedge

You should, but don't have to, mount the air governor on the compressor. It'll mount directly to the back side of that compressor.
The one you want is a model D-2. Internal to the compressor is the unloader valve.

So the governor is the junk on the outside that sends pressure into the top port on the compressor when it is told to "turn off" and stop compressing. I was under the impression that I needed an unloader valve mounted externally as well.

The one I bought says this:

Notes:
Port orientation viewed from rear.
Unloader/Inlet Assembly not supplied.

Should that have read "Governor/Inlet Assy not supplied?

3558186X - Remanufactured Cummins/Holset Style Compressor - Haldex product

So I figured I'd buy the inlet assy with the filter on it. But not sure where the unloader goes.

4x4dually · 07-18-2019, 10:15 AM

Ok. So I ordered a DA34200 Air Dryer and a KN18530 Governor as directed by Haldex tech support as that those are the parts that I "needed."

Now, I have to find a 3559586X Unloader Assy. FindItParts is out of stock. Google isn't helping much either.

Anyone got one of these?

3559586X - Compressor Unloader Assembly - Haldex product

I can have it overhauled if anyone has a core as well.

biggy238 · 07-18-2019, 11:35 AM

Dryer $386.65
Gov $23.93

Im have trouble on that 355 pn

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BigPapa · 07-18-2019, 12:10 PM

All I could find.....

4x4dually · 07-18-2019, 12:37 PM

Quote:

Originally Posted by biggy238

Dryer $386.65
Gov $23.93

Im have trouble on that 355 pn

Ordered from FindItParts, Haldex's largest distro.

Got both delivered for $336.08 after asking for a 15% discount since the internet wouldn't let me use it. ;D

The dayum unloader assembly is turning out impossible to find. No one has them in stock. FindItParts will rebuild in 3 wks or less if you have a core...I don't have a core even.

BigPapa · 07-18-2019, 12:42 PM

So, you don't have a compressor at all? If that's the case, the 3559568K Maintenance Kit wouldn't help you, either.

4x4dually · 07-18-2019, 12:43 PM

Quote:

Originally Posted by BigPapa

So, you don't have a compressor at all? If that's the case, the 3559568K Maintenance Kit wouldn't help you, either.

I have the compressor. I need the unloader.

*Snedge* · 07-18-2019, 12:50 PM

The unloader is built into the compressor head. You don't need one.

4x4dually · 07-18-2019, 12:52 PM

Quote:

Originally Posted by Snedge

The unloader is built into the compressor head. You don't need one.

Then why does it specifically say "does not include the unloader" and the guy at Haldex tell me I needed one? I'm so confused.

Even the page BigPapa posted says it isn't included. I'd love for it to be in the head though. please please please.

TheHammer · 07-18-2019, 01:05 PM

Quote:

Originally Posted by Snedge

The unloader is built into the compressor head. You don't need one.

I second this. Unless the seal or valve itself has failed(which happens rarely) it should not need to be replaced. The gov can be remote mounted pretty easily, as as several manufacturers have them mounted remotely. Personally if you have the room, mount it on the compressor.

4x4dually · 07-18-2019, 01:11 PM

Quote:

Originally Posted by TheHammer

I second this. Unless the seal or valve itself has failed(which happens rarely) it should not need to be replaced. The gov can be remote mounted pretty easily, as as several manufacturers have them mounted remotely. Personally if you have the room, mount it on the compressor.

I'm not trying to replace it....I bought the compressor and they tell me it doesn't have one.

This is what I bought. Is the thing on top the unloader or not?

3558186X - Remanufactured Cummins/Holset Style Compressor - Haldex product

*Snedge* · 07-18-2019, 01:16 PM

Okay. Sorry to confuse the issue.
The QE296 Does not have the unloader in the head. My fault.
The compressor you purchased is a newer design. You could eliminate the need for an unloader assembly if you had purchased an air dryer with the unloader built in it.

4x4dually · 07-18-2019, 01:18 PM

Quote:

Originally Posted by Snedge

Okay. Sorry to confuse the issue.
The QE296 Does not have the unloader in the head. My fault.
The compressor you purchased is a newer design. You could eliminate the need for an unloader assembly if you had purchased an air dryer with the unloader built in it.

Well ****. Maybe I need to call them back and do that then. Crap.

SmokinCAT · 07-18-2019, 01:23 PM

Cummins does not have separate listings for those unloaders.

4x4dually · 07-18-2019, 01:31 PM

Nope. No dryer that style with unloaded. However, the "X" on the end means reman. If I search for the part number with n "X," found one. Ordered.

WHOO HOO!!!

3559586 | QE Unloader | Highway and Heavy Parts

4x4dually · 07-18-2019, 01:32 PM

Thanks for all the tips and help ya'lls'all's.

07-17-2019, 02:44 PM	#1
4x4dually Name: 4x4dually Title: Moderator Status: Not Here Join Date: Jan 2007 Location: Stillwater, OK Member`s Gallery Posts: 31,812	Cummins C-Series - Type QE296C. Explain "governor" So I bought this reman compressor for the 8.2L. Apparently I need to buy an unloader valve and a 'governor' for it. I understand the unloader part. What is the governor? Isn't that inside the compressor? If it is external, how the hell does it tell it when to pump or not? Makes no sense. Anyone explain? 3558186X - Remanufactured Cummins/Holset Style Compressor - Haldex product I'm trying to figure out what parts I am missing. Apparently I need an inlet assembly too? All I got was in the picture. __________________ Jory 2009 4x4 3500 MCLB "There are people far less intelligent than you making a living doing this stuff." - Jeff Mumau

07-17-2019, 03:14 PM	#2
biggy238 Name: biggy238 Title: Too Much Time Status: Here Join Date: Aug 2008 Location: Just North of Wrong Member`s Gallery Posts: 10,867	It sets the cut in and cut out pressures so that the compressor is only under load when needed. Sent from my SM-G950U using Tapatalk __________________ Check out @bdmaximusworx 05.5 Campanella White TDi Jetta 5spd 45.5MPG -Little Sexy '10 Silver F250 CCLB 4X4 6.4L cummins Swapped Insta @trash.panda250 Last edited by biggy238; 07-17-2019 at 03:16 PM.

07-18-2019, 06:59 AM	#3
4x4dually Name: 4x4dually Title: Moderator Status: Not Here Join Date: Jan 2007 Location: Stillwater, OK Member`s Gallery Posts: 31,812	Wildman sent me some pictures. It appears there are several versions. One that mounts on top of the head that looks like it belongs and one like the first one above that mounts up top but on the outside. Any reason it can't be mounted remotely? And yes, I did move the relay valve for the front brakes to the side on one frame rail......after that I was wondering if it was placed in the center for a reason. I guess it is....but we are gonna try it. The truck always pulled to the right on brakes anyway...maybe it will correct it back straight. __________________ Jory 2009 4x4 3500 MCLB "There are people far less intelligent than you making a living doing this stuff." - Jeff Mumau

07-18-2019, 11:35 AM	#7
biggy238 Name: biggy238 Title: Too Much Time Status: Here Join Date: Aug 2008 Location: Just North of Wrong Member`s Gallery Posts: 10,867	Dryer $386.65 Gov $23.93 Im have trouble on that 355 pn Sent from my SM-G950U using Tapatalk __________________ Check out @bdmaximusworx 05.5 Campanella White TDi Jetta 5spd 45.5MPG -Little Sexy '10 Silver F250 CCLB 4X4 6.4L cummins Swapped Insta @trash.panda250

07-18-2019, 12:42 PM	#10
BigPapa Name: BigPapa Title: Truckless Status: Here Join Date: Jan 2008 Location: Springfield, TN Member`s Gallery Posts: 5,037	So, you don't have a compressor at all? If that's the case, the 3559568K Maintenance Kit wouldn't help you, either. __________________ Scott 2003 Avalanche Z71 Common sense is like deodorant. The people that need it most never use it.

07-18-2019, 10:15 AM	#6
4x4dually Name: 4x4dually Title: Moderator Status: Not Here Join Date: Jan 2007 Location: Stillwater, OK Member`s Gallery Posts: 31,812	Ok. So I ordered a DA34200 Air Dryer and a KN18530 Governor as directed by Haldex tech support as that those are the parts that I "needed." Now, I have to find a 3559586X Unloader Assy. FindItParts is out of stock. Google isn't helping much either. Anyone got one of these? 3559586X - Compressor Unloader Assembly - Haldex product I can have it overhauled if anyone has a core as well.

07-18-2019, 12:50 PM	#12
Snedge Name: Snedge Title: Comp Diesel Sponsor Status: Not Here Join Date: Sep 2006 Location: Western Pa. Member`s Gallery Posts: 18,859	The unloader is built into the compressor head. You don't need one.

07-18-2019, 01:16 PM	#16
Snedge Name: Snedge Title: Comp Diesel Sponsor Status: Not Here Join Date: Sep 2006 Location: Western Pa. Member`s Gallery Posts: 18,859	Okay. Sorry to confuse the issue. The QE296 Does not have the unloader in the head. My fault. The compressor you purchased is a newer design. You could eliminate the need for an unloader assembly if you had purchased an air dryer with the unloader built in it.

07-18-2019, 01:23 PM	#18
SmokinCAT Name: SmokinCAT Title: Cheap and Easy. Status: Not Here Join Date: Sep 2008 Location: Hillsboro, Oh Member`s Gallery Posts: 3,162	Cummins does not have separate listings for those unloaders.

07-18-2019, 01:31 PM	#19
4x4dually Name: 4x4dually Title: Moderator Status: Not Here Join Date: Jan 2007 Location: Stillwater, OK Member`s Gallery Posts: 31,812	Nope. No dryer that style with unloaded. However, the "X" on the end means reman. If I search for the part number with n "X," found one. Ordered. WHOO HOO!!! 3559586 \| QE Unloader \| Highway and Heavy Parts

07-18-2019, 01:32 PM	#20
4x4dually Name: 4x4dually Title: Moderator Status: Not Here Join Date: Jan 2007 Location: Stillwater, OK Member`s Gallery Posts: 31,812	Thanks for all the tips and help ya'lls'all's.