2nd Gen Non-Engine/Transmission Leaking slave or secondary brake cylinder?

[CumminsPuller]

Has anyone heard of this? It looks like it is leaking where it mates to the master and the back aswell both leaks on the bottom. Is that what they call it, a slave or secondary cylinder? That section with the blue cylinder lookin' deal holding the compressed gas charge, I think it is a charge of Nitrogen? Anyway it is leaking at the front, where it mates to the master and and at the rear where it mates to something, I do not know what it is.



Is this piece a dealer only item? I called a few parts houses and neither had a listing for it? Any idea what the cost and the dificulty in replacing it?





Jason

 

[B.G. Smith]

Brake booster

The thing you describe is the hydraulic brake booster, it uses fluid pressure from the power steering pump to assist with applying the brakes. And yes, the blue cylinder is the gas charged accumulator which is supposed to give you a couple of brake application assists after the engine is off. The leak at the rear just about has to be the booster leaking, the one at the master cyl. could be either one, check and see if it is brake fluid or power steering fluid. The thing behind the booster is just an adapter piece I think. Don't know if this is available as aftermarket item or not, it would be called the "hydroboost" or "hydraulic brake booster".

 

[CumminsPuller]

Thanks BG... ... ... . So basically I know I am going to need a new hydraulic brake booster and posibly a new master cylinder. But won't know until it all comes apart? Teach me here... ... How does power steering fluid come into play here and how can i tell the difference between the two while I am checking?



Jason

 

[B.G. Smith]

Brakes

The power steering pump puts out somewhere in the neighborhood of 1,000# pressure, this pressure is utilized to assist with the application of the brakes through the booster as well as assist with the steering of the vehicle. The power steering fluid flows to/through the booster when the brakes are applied. The leak toward the firewall just about has to be power steering fluid. The one between the master cyl. and the booster could be either. Brake fluid will be water soluable and will wash off with plain water, PS fluid would require a solvent to remove. bg

 

[CumminsPuller]

BG... ... ..... You learn something new everyday... ... . Thank you... ... .



Jason

 

[Mr. C]

Get ready for some sticker shock, that thing is expensive and when I checked around the Dealer was the only source. Mine started leaking where you describe but it seems to have stoped for now. I don't know if it's related but I've had problems with the steering when turning at a stop in parking lots. With my foot on the brake it acts like there is no power steering,when I let off the brake the power steering is back and to make matters worse it is an intermitent problem so it's hard to find the cause.

When I was looking for one there was a rebuild service but you had to send yours to be rebuilt with a 5 day turn around--No thanks!! Hopefully there will be an influx of cores to the market soon.

I am keeping a bottle of PS fluid in the truck in case the leak comes back for now

Mike

 

[CumminsPuller]

Mike, I may have solved your ploblem for availability... ... ... I also was under the impression yesterday it was a dealer only item... ... All the parts houses I called yesterday did not have a lisiting for hydraulic brake cylinder or hydro-booster. Well I called the dealer this morning and are you ready???? $650. 00... ... ... And it would take about 4 days to get, they did not have one in stock... . So I thought well I will try NAPA (they are closed here on Sundays). What do you know... ... they had a listing for one. $230. 00. I had them send it two day. Actually with my discount it was $200. 00 then for the two day it was another $25. 00 or so. The manufacturer is A1 Cardone.



Jason

 

[Mr. C]

Jason,

I hope you have better luck than I did at NAPA, they sent a vacuum pump when I ordered the Hydroboost unit from them. I like NAPA and use them alot and I get a generous "truckers discount", they were the ones that found the rebuild service for me. Let me know if you have better luck!

I think you will probably find a vacuum pump in the box when you open it so do yourself a favor and open it at the counter before you leave and save the trip back to the store. I went through this about 8 months ago and $230 sounds about right, I had it overnighted and when I opened it

Mike

 

[CumminsPuller]

Mike... ..... Mine is also leaking between the hydraulic booster and the master cylinder... ... I think that explains why my steering sounds/feels funny. This all happened in about a 6 hour period sarting about 1am Sunday morning and by 6am it was terrible.



Jason

 

[Mr. C]

I don't have any weird noises from mine even when it's cold. Most of the time it acts completly normal, just once in a while it acts like a manual steer truck only when stopped with my foot on the brake.



Mike

 

[CumminsPuller]

Mike... ... ... You got me worried now... ... . So I just called NAPA back and asked them to look up the part number for a vacuum pump. And it is a different number. And at a price of a little over $400. 00. The NAPA part number for the Hydraulic booster is 52-7354... ..... I think I will shoot Cardone an e-mail and see what they say.



Jason

 

[CumminsPuller]

I think I am getting weird noise/feeling in the steering wheel brake and gas pedal because I am leaking power steering fluid so fast.



Jason

 

[Mr. C]

Let me know when you get the part if it's the right one. It sounds to good to be true, maybe I'm just too cynical.



Mike

 

[CumminsPuller]

I hope you are cynical, because I use my truck for a living and I can' afford to be sitting around. Especially this time of year when everything is slowing down already. Is it possible the wrong part was in the box?



Jason

 

[Mr. C]

No, it was in a Cummins box and I'm pretty sure they don't make Hydroboost unis for DC. I think somone just got a number wrong when they made the parts catalog. It is odd that it was the correct vacuum pump for my truck though.



Mike

 

[CumminsPuller]

Well I will let you know when it comes in... ... ... Fingers crossed.



Jason

 

[CumminsPuller]

Mike... ... ... Well I just go a reply to me e-mail I sent to A1 Cardone... ... . And this is the picture he sent to me matching the part number I got from NAPA. Part number 52-7354.



Jason

 

[Mr. C]

Looks like the right part. If it fits PM me.



Thanks,Mike

 

[CumminsPuller]

We'll do



Jason

 

[CumminsPuller]

Mike, just as a side note. O'Reiley's did some research for me and the same OEM part they could get for $500. 00 vs. Dodge at $650. 00.



Jason