Thingamabob disconnected on top of Cummins engine

gkainz wrote:
You might try posting this to dieselram.com forum under RV section ... there's a number of Cummins savvy folks there ... one guy works on firetrucks specifically, iirc.

Will do, just what I need, another password to remember.

It is amazing that I got opposing opinions from Cummins and Syracuse, NY | Cummins Northeast, LLC, Syracuse, NY | Cummins Northeast, LLC are the people that sent the diagram.

I know, I know!! It's a whatemcallit that controls all the thingamajigs. See, that wasn't hard.

Ron

lanerd wrote:
I know, I know!! It's a whatemcallit that controls all the thingamajigs. See, that wasn't hard.

Ron

Thanks!

Answers all of my questions!

GlennLever wrote:

gkainz wrote:
You might try posting this to dieselram.com forum under RV section ... there's a number of Cummins savvy folks there ... one guy works on firetrucks specifically, iirc.

Will do, just what I need, another password to remember.

It is amazing that I got opposing opinions from Cummins and Syracuse, NY | Cummins Northeast, LLC, Syracuse, NY | Cummins Northeast, LLC are the people that sent the diagram.

Doesn't surprise me in the least. What totally shocked me was that you got an answer at all! :)

gkainz wrote:

GlennLever wrote:

gkainz wrote:
You might try posting this to dieselram.com forum under RV section ... there's a number of Cummins savvy folks there ... one guy works on firetrucks specifically, iirc.

Will do, just what I need, another password to remember.

It is amazing that I got opposing opinions from Cummins and Syracuse, NY | Cummins Northeast, LLC, Syracuse, NY | Cummins Northeast, LLC are the people that sent the diagram.

Doesn't surprise me in the least. What totally shocked me was that you got an answer at all! :)

Received another response from Cummins, their last response before this one and me sending them the plumbing diagram was

"The part that you are referring to in the pictures, looks to be a temperature sensor for coolant"

Now the response is

"Hi Glenn,
That solenoid valve opens and closes allowing fluid to pass or not.
Mark
Customer Care Representative
If we have misunderstood the information in your communication or you have additional questions please feel free to respond to our support staff by e-mailing powermaster@cummins.com or call Monday through Friday, 7 a.m. to 7 p.m. ET at 1-800-DIESELS (1-800-343-7357). If you are located outside of North America, you can reach us at 812-377-3000.
For authorized service center locations please visit:
Cummins.com
Cummins.com
Everytime.cummins.com "



No explanation of the purpose or if there would have been one or two wires, I'm not impressed.

I'm going to check to see if there is continuity between the terminal and the block of the engine (see it the solenoid could be grounded through the valve, and check to see if the wire lead is hot on a cold start)

GlennLever wrote:

Handbasket wrote:
Best start by saying that I've never owned a diesel, but I did work on them in the USN long ago. Here's my interpretation:

Parts # 6 are starting aids, which to me says they're 'choke' injectors. They're akin to the choke on an old carbed gas engine, used to give a richer mixture when starting. Part # 2 is a solenoid (operated) valve, probably energized on cold start and allowing fuel to flow to #6.

At a total guess, it's a generic solenoid valve, with several uses. The second terminal may be to allow for a ground wire when needed. Yours may not need a ground wire, since it may ground thru the mount or the metal line to the 'start aids'.

Check for continuity & resistance with a volt-ohm meter, measuring from the wired terminal to both the body of the solenoid & to unwired terminal. If I'm right, there'll be almost no resistance between the unwired terminal & the body, but there will be measurable resistance between the body & the wired terminal.

Good luck, both with it, and with following my gibberish... ;)

Jim, "The old expert, often wrong but never in doubt."

Your suggestion to check to see if it is grounded through the boby is a good one, thanks, will do, will also check to see if the wire that is connected goes hot when cranked outside in the cold.

A good guess. Parts #6 are intake air preheat units which inject a small amount of fuel supplied by the line via part #2. The electrical connectors to #6 ignite the fuel. Mine has the same setup and one of the #6 units was broken when I bought the unit in 04. Purchased a new one thru Cummins. This system is only active during the preheat or wait to start cycle. It is not unusual for a solenoid to have only one connector and the mounting threads supply the ground to complete the circuit.

The 325 engine was used in fire engine applications and to some MH manufacturers. I think it is a great engine and has been a reliable work horse in my bus.

The second answer from Cummins wins.

It looks like fuel supply valve for a THERMOSTART or flame starting system, lines go to two intake heaters. Power to valve opens and supplies diesel to two intake heaters that have fuel lines and a heater element inside that ignites the diesel that drips from heater to preheat the intakes.

Variation of this system is used on many Perkins, Yanmar and other engines sometimes you will find a small reservoir above the engine that is topped off by fuel return line from injection pump going to fuel tank.

BERU information

http://www.beru.com/bw/products/diesel-cold-start-technology/cold-start-aids-for-commercial-vehicles

David

As for the two terminals---my guess is the second terminal maybe used for an indicator lamp on some models.

jtfcons wrote:

GlennLever wrote:

Handbasket wrote:
Best start by saying that I've never owned a diesel, but I did work on them in the USN long ago. Here's my interpretation:

Parts # 6 are starting aids, which to me says they're 'choke' injectors. They're akin to the choke on an old carbed gas engine, used to give a richer mixture when starting. Part # 2 is a solenoid (operated) valve, probably energized on cold start and allowing fuel to flow to #6.

At a total guess, it's a generic solenoid valve, with several uses. The second terminal may be to allow for a ground wire when needed. Yours may not need a ground wire, since it may ground thru the mount or the metal line to the 'start aids'.

Check for continuity & resistance with a volt-ohm meter, measuring from the wired terminal to both the body of the solenoid & to unwired terminal. If I'm right, there'll be almost no resistance between the unwired terminal & the body, but there will be measurable resistance between the body & the wired terminal.

Good luck, both with it, and with following my gibberish... ;)

Jim, "The old expert, often wrong but never in doubt."

Your suggestion to check to see if it is grounded through the boby is a good one, thanks, will do, will also check to see if the wire that is connected goes hot when cranked outside in the cold.

A good guess. Parts #6 are intake air preheat units which inject a small amount of fuel supplied by the line via part #2. The electrical connectors to #6 ignite the fuel. Mine has the same setup and one of the #6 units was broken when I bought the unit in 04. Purchased a new one thru Cummins. This system is only active during the preheat or wait to start cycle. It is not unusual for a solenoid to have only one connector and the mounting threads supply the ground to complete the circuit.

The 325 engine was used in fire engine applications and to some MH manufacturers. I think it is a great engine and has been a reliable work horse in my bus.

I believe you are correct.

I just have to determine if a ground is needed and that is a simple test.

I will not be able to check until next week.

Thanks for your input, I am very encouraged by the 325 Cummins engine. all good news.

I love this quote "The 6CTA 8.3 (450 Diamond) is the most sought after marine diesel in both recreational and commercial markets" off of this site http://www.sbmar.com/cummins-6cta-tech-info.php

dkf435 wrote:
The second answer from Cummins wins.

It looks like fuel supply valve for a THERMOSTART or flame starting system, lines go to two intake heaters. Power to valve opens and supplies diesel to two intake heaters that have fuel lines and a heater element inside that ignites the diesel that drips from heater to preheat the intakes.

Variation of this system is used on many Perkins, Yanmar and other engines sometimes you will find a small reservoir above the engine that is topped off by fuel return line from injection pump going to fuel tank.

BERU information

http://www.beru.com/bw/products/diesel-cold-start-technology/cold-start-aids-for-commercial-vehicles

David

This sounds like what I have. Thanks for the link