Do I have to go with the Jacobs Vacuum pump or can I go with an aftermarket option?

[GShail]

Yeeeee Haaaaawwww!!!! Cool. After talking and pressuring umpteen Cummins parts guys, I was finally able to find a guy who knew how to cross reference the Dodge part number to the Cummins part number. My new vacuum pump is on its way at a savings of about $350. 00



The Cummins people have to look on what is called an IMS screen, select the correct option and then put a 0 in front of the Dodge part number in order to correctly find the part.



Thanks again Posm!

 

[yogibear]

What is the Cummins part #??? Thanks.

 

[GShail]

Cummins part # is 3965925

 

[klenger]

Someone just got their money's worth from a $35 TDR membership.

 

[GShail]

I have got my moneys worth time and time again, TDR is the greatest!

 

[GShail]

Took off the old pump and put on the new in about 15 minutes. Man, it sure is great to have the exhaust brake working again. It was no fun running down those hills without it and she sure appreciates it at startup in the cold!

 

[Posm]

Just ordered mine. Under $300. 00 delivered to my front door, next day. If you can wait on the next stock order (one to three weeks) to come into your local Cummins shop, it will only be $248. 04 plus sales tax. I would have waited, but my closest Cummins shop is 90 miles away and we have 10% sales tax in AL.



Bryan

 

[mathiowetz]

The switch on my jacobs had a bad spot and intermittly wouldn't work. I took it to Lithia Dodge in Anchorage at 35,000 mi. to get it fixed under 3/36. They had to order the switch. They installed the switch and the intermitted problem became worse, hardly working at all. They determined it was a defective new switch. They ordered another one and installed it, all was fine till two days later and there was a awful sound coming from under the hood. It was the vacuum pump going out. At this point I had 36,700 miles so the the 3/36 was expired. I took it back to them and they offered me a "good will" warranty. $100 Deductable. I guess it was better than the $700 they said it would cost. Finally it worked like new and was able to use it for the trip back on the alcan. I really feel like they could have engineered something better for what they charge to install it.

 

[mathiowetz]

I remeber in my installation instructions for my jacobs there was a parts list that gave DC part#s and Cummins #s

 

[Posm]

I put my new vacuum pump on today and it had a manufacturer sticker on it. The companies is Linamar. It looks they may be a reseller of automotive componets. Also, the pump was made in Hungary. If I made such a POS, I would not put my sticker on it.



Here is their web site:

http://www.linamar.com/LinamarHomePage/



Bryan

 

[mysteryman]

electric vacuum pump, ACDelco

A pump I have used in the past was a GM original equipment pump made by AC-Delco #215-119. It is discontinued, but a replacement is available from Standard Motor Products part # VCP-103. The last one I bought cost $ 140. 68.



I used these to boost the vacuum level on my cars that had gas engines that produced little or no vacuum at idle due to long duration camshafts...



This pump was used originally on 80's GM X body cars to run the brake boosters and heater/ac controls... ... .



I have never had one fail and they seemed to solve my brake problems.....



I am going to try one of these on my first gen trucks when the vacuum pump blows and just mount the P/S pump right onto the gear case... . But I have not had the need to do so yet.....

 

[Shooter]

The JAKE pump is a diaphram pump as is th GM. How long will a rubber diaphram hold up to flex and ozone? Tires are only good for 6 years. The GM's were used on the 79-8? diesel cars and other mentioned applications, good for 60k or so.

The stinkin JAKE pump makes more noise than the 3rd gen Cummins. If the Jake pump bearing seizes you can not install stock belt as the Jake pully will interfere unless the shaft and pully breaks off.

 

[Posm]

The 2004 may be slighltly different from your 2003, but I have put the stock belt on mine three times when the pump went south and it did not interfere with the pump pulley.



Bryan

 

[jelag]

Remember that all the old gasoline fuel pumps were diaphrams. . and they lasted years... in some cases they had 2 diaphrams... . one pumped gas the other worked the vacuum windshield wipers... . I know..... I'm older than most of you.....



BTW when I was young, you could buy a rebuild kit for the pump..... and service the thing... .



If one of you is willing to send me one... . I'd see if they can be rebuilt... . we do some funny stuff like that sometimes.....

 

[TowPro]

It looks like the pump in the picture above is electric controlled. Wonder what the delay would be from when you turn it on until it has enough vacuum to turn the brake on? Just use the Jacobs relay that turns on the brake to fire another relay that turns on that pump.

 

[MMeier]

It looks like the pump in the picture above is electric controlled. Wonder what the delay would be from when you turn it on until it has enough vacuum to turn the brake on? Just use the Jacobs relay that turns on the brake to fire another relay that turns on that pump.

If I'm not mistaken, that one should run all the time,, hence you should have vacuum ready for your disposal at any given time, correct mysteryman?

 

[MMeier]

Just ordred my pump from Cummins, will be in tomorrow... . going to make a run tonite, hope my service brakes don't fry!!

 

[GWBourne]

Cummins part # is 3965925

did this part number work?



im getting a price i love, but it is 10% of what the dealership told me. dont get me wrong, im very happy about this, but the thing is they are not sure of an application or anything. they just know it is a vacume pump... .

Grant

 

[gtobey]

Pod maybe available for the diaphragm exhaust brake vacuum pumps.

I don't have an exhaust brake on my '06 truck, but we just got word from Delphi today that the POD is available for replacement so you won't have to replace the entire unit. They even provide instructions to check out the drive unit so that you can tell if it is good or bad. The POD is less than $100! PM me or email me and I'll let you know about the information I got! Hope it will help.



Here's the instructions for checking out the drive unit:



Before fitting a new Vacuum Pod:



• Confirm the frame is in good condition.

• Check to see if the drive can be rotated easily (without the Pod installed) and is free of dirt

and contamination.

• Check the condition of the Pod push rod. A worn push rod could indicate a damaged cam.

Visually inspect the cam lobe.

• Check the lubrication level in the frame. It should contain approximately 8-12 cubic centimeters of 80-90W gear lube.

• Install the new Pod with the 4 bolts previously removed during inspection. Torque the bolts to 10-14 NM and reinstall assembly to vehicle.

 

[TowPro]

gtobey, any reason you can't post the info here?