2015 Dynasty Hydraulic Line Rupture - HWH or Power Steering?

[thomasgibbens]

On a recent trip, we broke a hydraulic line at the fitting just above the Hydraulic pump and sprayed hydraulic fluid all over the back of the motorhome and tow vehicle.  I took it over to my Cummins dealer for service on it to repair the line and they said they would not touch it because there is not enough line to press a new fitting onto and the lines run down to the frame in a tube and then run to the front levelers inside the frame.  They have no idea how they route so I checked with my Freightliner service center and they told me the same thing, take this back to the manufacturer.  I understand, from talking with others, that these failures are not uncommon.  I guess my question is if you have had issues with hydraulics, can a new fitting be pressed onto the existing line and is it reliable?  Cummins pointed out that several other lines were showing signs of stress and they recommend repair and replacement of all lines!  

Tom Gibbens

'15 Dynasty

[waterskier_1]

I'm confused.  It's this line for the power steering & side mount radiatorfan motor, or is this part of the hydraulic leveling system?  In not familiar with 2015 Dynasty, but legacy models these were two separate systems.  I believe that hydraulic leveling was an optional, stand alone system, manufactured but a third party (HWH, Power Gear, etc.).

  - Rick N 

[Tom Cherry]

16 minutes ago, waterskier_1 said:

I'm confused.  It's this line for the power steering & side mount radiatorfan motor, or is this part of the hydraulic leveling system?  In not familiar with 2015 Dynasty, but legacy models these were two separate systems.  I believe that hydraulic leveling was an optional, stand alone system, manufactured but a third party (HWH, Power Gear, etc.).

  - Rick N 

ditto....there is a hydraulic pump that drives the fan (radiator or CAC) and the power steering.  if you lost that line, I would think that you would not have or perhaps "impaired" power steering.  That is a CHASSIS system. 

The slides are, I think as Rick does, an HWH system.  That motor is located in the front to the right of the Genny.  If that is where the line broke....then you will need to find an HWH dealer.  Look on the build sheet or the list of components...might be labeled as Recreational Vehicle Data Card. You should find HWH there. 

Any reliable OTR truck shop can fix a hydraulic leak on the power steering and fans system.  The Pump was (in 2009) a Casappa special pump that Monaco used.  It is labeled "Hydraulic Pump".  It is driven from the engine and located in the rear.  

 

[Ivan K]

I agree with Rick but regardless what it is, why couldn't they at least just make a short extension to the line. Or maybe that's what they wanted to do and there wasn't enough meat left before the hose disappeared in a pipe? I doubt the engine powered compressor has anything to do with jacks and the only forward run is to the steering box which should be straight forward replacement. Maybe even pull the hose toward rear and make the extension up front where there might be more of an accessible run.

[Mike H]

30 minutes ago, Ivan K said:

I agree with Rick but regardless what it is, why couldn't they at least just make a short extension to the line. Or maybe that's what they wanted to do and there wasn't enough meat left before the hose disappeared in a pipe? I doubt the engine powered compressor has anything to do with jacks and the only forward run is to the steering box which should be straight forward replacement. Maybe even pull the hose toward rear and make the extension up front where there might be more of an accessible run.

I was thinking the same thing about just splicing in a new section of hose or building an extension.

[vito.a]

A 2015 Dynasty is a Fleetwood/American Coach built and much different than the legacy Monaco coaches built in Oregon.  The chassis is called a "Roadmaster B" but has Freightliner components.  

I think you are running into the classic issue of truck repair centers not wanting to deal with motor homes.  I agree with Ivan.  They should be able to make a patch hose to repair and extend the current hose.  Even if it's to short, they can remove the hose at the front and pull enough to the rear to work on it.  If you can find a good hydraulic shop they would be capable to repairing it.  The issue here is they may be reluctant to crawl under the coach.  But many of them repair heavy equipment hoses while still attached to the equipment.  

Good luck!

[klcdenver]

I would call a mobile hydraulic repair man. They are use to patching and making things work where dealers just want to swap parts.

[Guest Ray Davis]

It may not be possible to just pull the hose.  I realize a 2015 REV coach is probably very different but judging by Mike ( Zmotorsports ) IRV2 and his

03 Dynasty the hydraulic lines were bundled and zip tied together.

[Old Dog]

I've had several slideout hydraulic hoses that were leaking at the crimped fittings. These are a Parker -4 (1/4") hose (superceded by newer hose) and the fittings are readily available along with portable crimping machines that cost $100.00 rental. So far I've had to redo 5 and have another one that's started to leak. All the hoses I've  done to date have extra hose coiled up in the overhead of the bays. In my case above the water tank and fuel tank. This allows plenty of slack to get the hose end out from under the coach and get the crimper on. I simply use a cut off wheel to remove the old fitting, thoroughly claim the inside to remove any debris and then crimp the new -4 fitting on. I've had to redo just one. It's much easier then pulling a new hose. Can't say much good about how HWH put there hoses together. I've worked with hydraulic hoses for years and never seen so many crimp failures.

If anyone needs the hose and fitting info let me know and I'll dig it out.

[Craggar]

Like everyone says, I think it's your hyd. for the fan and power steering but either again I agree that it should be doable to make an extension hose to repair it. As for your remark about them saying they should all be replaced I find that hard to believe being it's a 2015. Mine are just at that point now and are pushing 25 years old. 

Either find a small truck repair shop who are willing to work on just about anything or better yet either a mobile hyd guy or shop.

[jacwjames]

They make a field fit hydraulic fitting, it is a a two piece.  You screw the ferrule onto the hose and the the inner piece screws in and locks the hose onto the fitting.  We use to use these all the time but they aren't as available now.  You might contact a local hydraulic shop to see if they can source.  If the hose is tight and being stretched I'd add a piece.  Take the short piece to the hydraulic shop so they can identify the size. 

Here's a Youtube video showing an example of what I'm talking about

 

[Craggar]

1 hour ago, jacwjames said:

They make a field fit hydraulic fitting, it is a a two piece.  You screw the ferrule onto the hose and the the inner piece screws in and locks the hose onto the fitting.  We use to use these all the time but they aren't as available now.  You might contact a local hydraulic shop to see if they can source.  If the hose is tight and being stretched I'd add a piece.  Take the short piece to the hydraulic shop so they can identify the size. 

Here's a Youtube video showing an example of what I'm talking about

 

I've used Aeroquip fittings like those. You can order the from Summit or Jegs to name a couple places.  A little tough doing the one in place on the vehicle sometimes but definitely doable. 

[throgmartin]

For what its worth, we bring in a mobile hydraulic guy to custom make all new hoses with fittings. I blew a hydraulic line on a backhoe last year and the mobile guy came out, made a new hose, replaced the line and I was back digging in an hour. These guys do this for a living and are excellent at repairing these lines. When you consider renting specialized tools not to mention your time and labor you maybe better off calling in a specialist who knows all the work arounds, can effect a perfect repair that wont leak in the future and also warrants his work.

 

[jacwjames]

Probably the most important part of replacing or repairing a hose is the potential for contamination.   Take the necessary precautions to prevent anything from getting into the system.  In most cases the filtration is on the return side so if your working on a supply side hose and there's contamination it will get into whatever component it is supplying, i.e steering gear case. 

That would be one benefit bringing in a mobile repair, they should know the importance of keeping everything clean, blowing out the lines before installation. 

But on these rigs the way the hoses are run it's not an easy task to replace.  My steering hoses run through the chassis rails and are all bundled and tied together with other stuff.  

[thomasgibbens]

Obviously there is more to all this that I was not aware of. This is a ‘15 model so the slides are all electric. The levelers are Tru-Line made by Valid. We had no trouble steering so there must be a separate pump for that or it is electric. Can’t tell if side radiator is hydraulic or electric. I count 8 hoses connected to the pump at the rear and it looks like there are 5 solenoids. The Cummins truck said there was not enough room to get to the hose that broke off right at the end of the fitting. The hoses apparently turn down into a tube right behind the pump at run down into the frame.  I thought that someone could use a portable hydraulic compression tool to crimp on a new hose/fitting but they were not aware. I called Monaco and they said to bring it to Decatur, IN, which is closest to us.  I appreciate all the input and will suggest these at Decatur. 
Tom Gibbens

’15 Dynasty 

[Craggar]

If you have a grill on the drivers rear it's a side rad and from the pictures I saw online of 2015 Dynasty I think you have a side rad. The fittings I have used are done by hand with wrenches and still could be impossible to do without taking the line off if there isn't enough room.  

 As far as taking it to Decatur, is it not leaking and did Monaco say that no damage would be done by driving it there?

I would still see if you can find a mobile hyd. guy who can probably fix it cheaper and quicker then driving it to Decatur.

Edit: Because I reread your first post where they said what it was for. I'm guessing Cummins put a cap on the fitting at the pump so you don't lose anymore fluid.

 

Edited September 2, 2022 by Craggar

[Tom Cherry]

https://www.monacocoach.com/resources/media/user/1476904827_brc_pdf.pdf

There is no 2015 brochures.  Here is the 16.  Side radiator.  Hoss of a tranny.  Has a 4 point “auto air hydraulic” leveling system.  Freightliner (Reg TM) chassis, but listed as a “Roadmaster” …. Also TM’ed Chassis.  A contradiction that even a politician could not dream up….note…a GENERIC politician and not one of any particular persuasion….

my bet….leveling system…..past that…not a clue.  

Good luck. Keep us posted.

[waterskier_1]

I'm sure the Dynasty has a side radiator,  but I'm not sure when Freightliner when to direct drive (through U-Joints) for the radiator fan. 

  - Rick N

[thomasgibbens]

This hydraulic system is used for the levelers and I was advised to remove the power connection to the pump to keep from burning up the motor because there is no fluid in it, which I did. We are using air levelers only. I will check with other hydraulic companies before heading to Decatur. Thanks. 
Tom Gibbens

’15 Dynasty 

[Craggar]

4 hours ago, thomasgibbens said:

This hydraulic system is used for the levelers and I was advised to remove the power connection to the pump to keep from burning up the motor because there is no fluid in it, which I did. We are using air levelers only. I will check with other hydraulic companies before heading to Decatur. Thanks. 
Tom Gibbens

’15 Dynasty 

Makes much more sense now. When you first said it was at the rear of the coach I think everyone probably assumed it was the engine driven pump which feeds the fan motor and power steering. I think most coaches have the pump and tank for leveling at the front. You will be fine by unplugging it.