Hydraulic motor/pump question

Rambeau · 05-19-2016, 01:03 PM

It sound like our hydraulic pump for the jacks and slides(?) is cycling while traveling down the road. Is this normal? Where is the pump usually located on our DP

MaverickBBD · 05-19-2016, 01:09 PM

After you retract your jacks leave it on after retracting. It will power itself off and leave the valves in a pressure off position. What is the the level in your reservoir? Check your level only when slides in and jacks up and in the pressure off system. Manual says a half hour. If it is not an electrical issue the pump is trying to make pressure for something.

Rambeau · 05-19-2016, 01:40 PM

Maverick,
Thanks for the quick reply. The coach is new to us. Our first motor home, and first diesel pusher. Is the hydraulic pump a separate motor/pump or it driven off the accessory drive of the engine. Other postings mention that the jacks can be operated with the engine off and the key set to accessory to get rid of the overly loud warning buzzer so I assume it is a separate electric motor/pump. Is the unit somewhere up near the generator?

Ranger Smith · 05-19-2016, 01:51 PM

Is it your hydraulic pump or is it possibly the vacuum pump under the front cowl that is constantly running??

Rambeau · 05-19-2016, 02:26 PM

Quote:

Originally Posted by Ranger Smith

Is it your hydraulic pump or is it possibly the vacuum pump under the front cowl that is constantly running??

Seems like is was coming from the front (hard to pinpoint while driving at 60mph)...also only hear it when the engine is running.

Rambeau · 05-19-2016, 02:30 PM

Ranger Smith,
You may be right. I will check "under hood" next time I have the jacks/slides retracted and the engine running.

MaverickBBD · 05-19-2016, 03:12 PM

You will see a softball size black ball on the passenger's side. It has a tubing going into it that is notorious for leaks. Just snip on the end if it is split. As diesels don't produce a vacuum when running you have a separate vacuum pump for chassis a.c. controls.

Hydraulic pump most likely on top of reservoir under your entry step.

Should help you localize sound.

Rambeau · 05-19-2016, 05:45 PM

Quote:

Originally Posted by MaverickBBD

You will see a softball size black ball on the passenger's side. It has a tubing going into it that is notorious for leaks. Just snip on the end if it is split. As diesels don't produce a vacuum when running you have a separate vacuum pump for chassis a.c. controls.

Hydraulic pump most likely on top of reservoir under your entry step.

Should help you localize sound.

Thanks on location of hydraulic pump

Journey39n · 05-19-2016, 05:50 PM

We have the predecessor to your RV model. The hydraulic pump and reservoir are under the middle front step. there is one bolt that holds the step in place, remove the nut and you can lift the step.

Totally separate operation from your engine. Your slides are electric, the levelers are hydraulic.

Normal operation is for jacks to retract, and once fully retracted the alarm shuts off (if fluid level is sufficient, and sensor is working). If the alarm turns off, chances are the pump is done pumping the fluid back to the reservoir.

I suspect you are hearing something else as you drive down the road??

Like your name, my third grade teacher kept spelling my name like that (my dad always said that is wrong, but never did any good :-) ) proper way Rambow, too bad we don't get money for the movies!

We are nearing the 6 year point of living in our 39n model, a great coach.