Six pack left front not raising

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Six pack left front not raising

January 28, 2021, 01:20:20 pm

Rebuilt front six pack with Tom's kit. Now drivers side front will not raise high enough to remove safety blocks.

They air up some but not all the way. Passenger side goes all the way up.

Where should I look? What is likely cause?

Thanks

Re: Six pack left front not raising

Reply #1 – January 28, 2021, 01:35:38 pm

If everything worked fine before rebuild, then look first at anything you disturbed during your rebuild.

The bottom solenoids on the front 6-pack are the "raise" valves.

Check wiring connector for the bottom solenoid on the driver side?

Pull the driver side bottom valve off, take it apart, make sure there is no trash blocking the orifice?

Did you use any teflon tape anywhere when you reassembled the 6-pack?

Re: Six pack left front not raising

Reply #2 – January 28, 2021, 02:00:16 pm

Thanks It did work before. Just leaked down. Will start there. I tried to carefully mark everything but likely did not get something back correctly.

No Teflon tape used

Re: Six pack left front not raising

Reply #3 – January 28, 2021, 02:24:36 pm

Quote from: DayDreamer – January 28, 2021, 02:00:16 pm

No Teflon tape used

Good.

Re: Six pack left front not raising

Reply #4 – January 28, 2021, 02:26:43 pm

I had an issue with getting my safety stands installed on the right front. Lacked about a 1/4" of clearance. I had previously replaced the pressure regulator on the supply line to the front 6- pack manifold and set the presssure to about 60psi. I bumped the setting on the regulator to 90psi and that solved the problem with the front of the coach raising high enough to install the safety stands.
My air schematic does not give a value for the front pressure regulator so I just went with what works.
You might want to check this out if you have a regulator on your front manifold.
Other than that I would have to agree with Chuck. If it worked before it is likely something that you did that caused it not to work🥺

Steve

Re: Six pack left front not raising

Reply #5 – January 28, 2021, 02:28:33 pm

Steve makes a excellent suggestion - give it a try.

Normal pressure for that regulator is 60, but a little higher won't hurt a thing.

Re: Six pack left front not raising

Reply #6 – January 28, 2021, 02:28:53 pm

I noticed the left center light on the HWH panel is lit if raising or lowering

Wondering if put solenoids back in wrong place

Re: Six pack left front not raising

Reply #7 – January 28, 2021, 02:57:10 pm

Try raising the side using the side button. Mine will do that every now and then if I've had it on the safety blocks and the air dumped.

Re: Six pack left front not raising

Reply #8 – January 28, 2021, 03:31:49 pm

Also make sure you have full pressure in your air system when trying to raise coach all the way up.

When I raise our coach to insert safety stands, I start with the air system at compressor cut-out pressure (about 130 psi on our coach). I push and hold the "raise" button, watch the air pressure gauges drop, air compressor kicks on, then I wait until the air system gets back up to 130 before I release the button. At that point, the coach is as high as it is ever gonna get, and I will usually have at least 1" of clearance when I insert my 11" safety stands.

Re: Six pack left front not raising

Reply #9 – January 28, 2021, 04:13:48 pm

All said it is really easy to get a wire connector or an air hose in the wrong place. At least for me it has been easy!
And probably the easiest thing to fix relating to the air valves.
I would certainly start by double checking all of the connections.
Steve

Re: Six pack left front not raising

Reply #10 – January 28, 2021, 06:25:47 pm

Still not working. Tried all of suggestion, but needed to step away from it and tackle again fresh in case I am overlooking something out of frustration.
Air connections all match up to drawing and numbers on the air lines.

Peeled back the wire covers and matched up all of the wire labels and they seem to be correct too, but think I will ask the DW to push the up/down buttons while I check the solenoids. What is an effective and safe way to do that? Thinking I can remove all of them then use a screwdriver to find the energized solenoids as she pushes the buttons on the HWH pad.

Re: Six pack left front not raising

Reply #11 – January 28, 2021, 06:55:34 pm

Quote from: DayDreamer – January 28, 2021, 06:25:47 pm

Thinking I can remove all of them then use a screwdriver to find the energized solenoids as she pushes the buttons on the HWH pad.

You don't need to remove them from the 6-pack as long as you have your safety stands in place.

Just have her push the button and do the screwdriver test, or just touch the solenoid with your fingers. You should feel the armature move and probably hear it also.....depending on ambient noise level and how much hearing you have left.

Re: Six pack left front not raising

Reply #12 – January 28, 2021, 07:41:06 pm

Does the driver front go flat if you walk away for a while? If so then you have a leak somewhere.

Check the two driver front air bags. Does it seem they are aired up the same. Maybe one is not getting any air or there is a leak on one air bag.

Mine is a 2006 so there are a number of differences. If you have a leak you might have damaged an O-ring some how. Or the air line connector has a bad leak. I rebuilt mine because passenger front would leak down. Took 30 minutes of an Hour. The pump would have to come on and raise the front. Over night without the pump it would leak completely down.

Re: Six pack left front not raising

Reply #13 – January 28, 2021, 08:11:02 pm

Trace each ladled solenoid wire to the manifold and see if it is in the eight location on the manifold. In my 2006 everything but the air lines were labeled on the manifold. It is real easy to get confused when working under the coach.

Re: Six pack left front not raising

Reply #14 – January 28, 2021, 08:50:05 pm

I've had several solenoids stop working. I diagnosed by using a DC ammeter clamp and the wife pressing buttons. Both my tag axle dump solenoids weren't working which I think is okay since they are connected through the rear dump solenoids so are redundant. I started having real problems when I couldn't dump the front left bag. Had to put it into travel mode to get things level (travel mode uses a different solenoid).

Re: Six pack left front not raising

Reply #15 – January 29, 2021, 09:20:33 am

Is there enough room to put a bottle jack next to the safety block to raise it enough to remove it? Proper size jack of course.

Re: Six pack left front not raising

Reply #16 – January 29, 2021, 09:28:21 am

I would think it better to leave the safety stands in place until the problem is solved...unless emergency need to move coach, of course.

Re: Six pack left front not raising

Reply #17 – January 29, 2021, 09:55:42 am

Currently no pressing need to move the coach, so I will leave the safety blocks in place so I can work under the coach. Hoping to get back to the coach this afternoon with the DW to push the buttons and do further diagnostics.....hopefully find and resolve the issue.
I appreciate all of the comments. Thanks Forum!

Re: Six pack left front not raising

Reply #18 – January 29, 2021, 11:48:13 am

Random thought here, especially for Mike R., what would happen if the raise and travel solenoids (or their electrical connections) were accidentally swapped on the manifold block? Would the ride height valve then limit the raise and cause this symptom?

Re: Six pack left front not raising

Reply #19 – January 29, 2021, 01:40:34 pm

daydreamer,

i sent you my phone number if you would like to chat about it. (via message)

tom mccloud

Re: Six pack left front not raising

Reply #20 – January 29, 2021, 03:04:02 pm

Quote from: Michelle – January 29, 2021, 11:48:13 am

what would happen if the raise and travel solenoids (or their electrical connections) were accidentally swapped on the manifold block? Would the ride height valve then limit the raise and cause this symptom?

I have never tried this to see what would happen either on purpose or by accident. So I need to mull this around as you have only one ride height valve in the front and both ride height solenoids are connected to it. Now if it was on the rear I think that would sure be a possibility. The lights are what is puzzling me also.

Mike

Re: Six pack left front not raising

Reply #21 – January 29, 2021, 03:44:36 pm

Quote from: Pamela & Mike – January 29, 2021, 03:04:02 pm

I have never tried this to see what would happen either on purpose or by accident. So I need to mull this around as you have only one ride height valve in the front and both ride height solenoids are connected to it.

If the ride height solenoid and raise solenoid for the driver front were swapped (or their electrical leads swapped) (but passenger was correct), what might it do? Is there a situation where the "brain" is trying to raise, could the ride height valve be accidentally inserted in the equation to limit the raise height?

I guess one could try putting the coach in Travel mode and see if that driver front continued to rise all the way up, while the passenger side only went to ride height...

Re: Six pack left front not raising

Reply #22 – January 29, 2021, 04:47:06 pm

Quote from: Michelle – January 29, 2021, 03:44:36 pm

If the ride height solenoid and raise solenoid for the driver front were swapped (or their electrical leads swapped) (but passenger was correct), what might it do?

After some thought this could happen and the ride height valve would be venting on one side while the other is staying up. If he was raising from the drivers seat by him self then by the time he got out and under the coach the air would all be vented on the one side and there would be no noticeable air venting. Now that I have thought about this it most likely has an air line, or electric cable swapped as it was working correctly before he started the rebuild, just had a gradual leak down. The solenoids will work in any place as they are all the same on this year coach only the numbers on the cable are different.

Mike

Re: Six pack left front not raising

Reply #23 – January 29, 2021, 04:58:39 pm

Quote from: Pamela & Mike – January 29, 2021, 04:47:06 pm

After some thought this could happen and the ride height valve would be venting on one side while the other is staying up. If he was raising from the drivers seat by him self then by the time he got out and under the coach the air would all be vented on the one side and there would be no noticeable air venting. Now that I have thought about this it most likely has a valve, air line, or electric cable swapped as it was working correctly before he started the rebuild, just had a gradual leak down.

Mike

Will not make it to the coach today to confirm, but I will double check all connections this weekend. I matched up the air lines based on the line numbers compared to the drawing and all are where they are supposed to be. I will double check the electric connections too.

Re: Six pack left front not raising

Reply #24 – January 29, 2021, 05:12:04 pm

Other thought that could cause something strange like this with all the hoses and electric connection in the proper place. Did you close off/tape off the air lines while you were working on the 6 pack? If not you could have a bug/mud dauber that crawled up in one air line while it was loose and now his dead remains is stopping up the works.

Pull the cover off the HWH control box and check all the little fuses that you will find in there. Seems like fuse #9 is the one that controls left front raise.

Mike

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