Drop Down Bed (1 Viewer)

Apr 30, 2018
2,019
4,511
Mid Suffolk
Funster No
53,655
MH
Adria Matrix 670DC
Exp
Motorhoming since 2018.
Hi
For some unexplained reason the drop down bed in our MoHo (Adria Matrix 670SL) has decided to drop & lift un-level (lower one side than the other).

When we fully drop the bed the passenger side mechanism (RHD) sits on the small rubber stops and the motor cuts off as it should do, but at this point the drivers side is still 10/12mm off the rubber stops, if we continue to hold in the operating toggle/switch the driver's side continues to drop until the mechanism hits the rubber stops than the motor cuts out as it should do, and the bed sits level.

When we lift the bed, the drivers side goes to maximum position (full height) and the motor cuts out as it should do, however at this point the passenger side is still c2 inches from the maximum position (full height), if we continue to hold in the toggle switch the passengers side continues to the maximum position and the motor cuts out as it should do.

This may have been the case since we first purchased the vehicle 12 months ago and we had not noticed it before. We have only just noticed this as we've been advised not to lift the bed to full height but to leave a 2-3inch gap between the mattress and the roof to prevent condensation.

Incidentally we don't use the bed but its niggling when its not sitting level.

Any suggestions please.

Thanks
Derry
 
Oct 17, 2013
705
19,186
Plymouth
Funster No
28,620
MH
Adria Compact
Exp
Since 2013
We had a Matrix Excel 590 with a wonky drop down transverse bed, the mechanism was a mechanical scissor type. Our dealer was unable to rectify it, but our local independant (where our daughter worked at the time) managed to adjust it level.
 

Minxy

LIFE MEMBER
Aug 22, 2007
32,733
66,839
E Yorks
Funster No
149
MH
Carthago Compactline
Exp
Since 1996, had Elddis/Swift/Rapido/Rimor/Chausson MHs. Autocruise/Globecar PVCs/Compactline i-138
Is it raised/lowered on straps? I may well be that one just needs tightening up so it sits level, may not have been wound correctly when it was first installed.
 
Aug 6, 2013
11,964
16,585
Kendal, Cumbria
Funster No
27,352
MH
Le-Voyageur RX958 Pl
Exp
since 1999
Hi
For some unexplained reason the drop down bed in our MoHo (Adria Matrix 670SL) has decided to drop & lift un-level (lower one side than the other).

When we fully drop the bed the passenger side mechanism (RHD) sits on the small rubber stops and the motor cuts off as it should do, but at this point the drivers side is still 10/12mm off the rubber stops, if we continue to hold in the operating toggle/switch the driver's side continues to drop until the mechanism hits the rubber stops than the motor cuts out as it should do, and the bed sits level.

When we lift the bed, the drivers side goes to maximum position (full height) and the motor cuts out as it should do, however at this point the passenger side is still c2 inches from the maximum position (full height), if we continue to hold in the toggle switch the passengers side continues to the maximum position and the motor cuts out as it should do.

This may have been the case since we first purchased the vehicle 12 months ago and we had not noticed it before. We have only just noticed this as we've been advised not to lift the bed to full height but to leave a 2-3inch gap between the mattress and the roof to prevent condensation.

Incidentally we don't use the bed but its niggling when its not sitting level.

Any suggestions please.

Thanks
Derry
If it's like mine fully down is the full extent of the actuators and their internal limit switches stop each individually. When the bed travels upward each end of the bed is stopped individually by limit switches (that look like rubber stops but aren't). The bed therefore auto-levels each time it hits the upper limit switches. If one side of your bed doesn't hit bottom or top the actuator travel (effectively length because of the internal limit) needs to be increased. To do this you need the bed fully down. Then remove the actuator mounting pin from the ram end whilst supporting that end of the bed. Set that end of the bed level with the other then adjust the length ofvthe ram (it's threaded) until you can replace the pin. Test the bed to check that your adjustment is correct - run it up & down a couple of times to settle the limit points - if OK job done.

Subscribers  do not see these advertisements

 
Jan 22, 2012
1,464
2,240
Wigan
Funster No
19,541
MH
Knaus Sun TI 2012
Exp
2010
We got an Adria Matrix Supreme 670dc. Picked it up brand new about 4 weeks ago. Went through everything, checking. Tried the electric bed put it down got in it then got out and raised it. Only drivers side moved. Don't know why but took the fuses out and put them back in and it moved back to start position?? Took it back to dealer and they checked it and it seems ok. Haven't used it since but will try it again now I've seen this thread.
 
OP
OP
DerryW
Apr 30, 2018
2,019
4,511
Mid Suffolk
Funster No
53,655
MH
Adria Matrix 670DC
Exp
Motorhoming since 2018.
@tonyidle Thanks for your response. The bed does sit level when its reaches the limit switches either fully dropped or fully lifted. The problem I have is, the drivers side hits the upper stop limits and cuts out before the passenger side does.
 

Timbob1961

Free Member
Mar 17, 2021
30
2
Funster No
79,833
MH
Matrix Supreme 670
I have the same situation.. Drivers side raises faster than passenger side.
Drivers side is a smooth motion passenger side hits an area of rough motion for part of the raise.
If I hold button in.. Will fully raise.
I am wondering if this is a linkage misalignment or excessive friction at the rough motion stage
 
OP
OP
DerryW
Apr 30, 2018
2,019
4,511
Mid Suffolk
Funster No
53,655
MH
Adria Matrix 670DC
Exp
Motorhoming since 2018.
Timbob1961. As its very infrequent that we had the need to drop the bed I've learned to live with it. Its still bugs me but having tried all avenues suggested on the forum. it can stay like it. The bed sits perfectly level when raised or lowered, so not the end of the world. just one of those niggling little things.
 
Mar 6, 2020
112
77
Funster No
69,221
MH
Adria matrix
Exp
13 years
Hi
For some unexplained reason the drop down bed in our MoHo (Adria Matrix 670SL) has decided to drop & lift un-level (lower one side than the other).

When we fully drop the bed the passenger side mechanism (RHD) sits on the small rubber stops and the motor cuts off as it should do, but at this point the drivers side is still 10/12mm off the rubber stops, if we continue to hold in the operating toggle/switch the driver's side continues to drop until the mechanism hits the rubber stops than the motor cuts out as it should do, and the bed sits level.

When we lift the bed, the drivers side goes to maximum position (full height) and the motor cuts out as it should do, however at this point the passenger side is still c2 inches from the maximum position (full height), if we continue to hold in the toggle switch the passengers side continues to the maximum position and the motor cuts out as it should do.

This may have been the case since we first purchased the vehicle 12 months ago and we had not noticed it before. We have only just noticed this as we've been advised not to lift the bed to full height but to leave a 2-3inch gap between the mattress and the roof to prevent condensation.

Incidentally we don't use the bed but its niggling when its not sitting level.

Any suggestions please.

Thanks
Derry
Because we removed the mattress and store folding chairs and table plus other items used frequently the bed is raised and lowered more than once on average every day ( although its never fully lowered and not quite fully raised to avoid damaging the ceiling.

Subscribers  do not see these advertisements

 
Mar 6, 2020
112
77
Funster No
69,221
MH
Adria matrix
Exp
13 years
I have the same situation.. Drivers side raises faster than passenger side.
Drivers side is a smooth motion passenger side hits an area of rough motion for part of the raise.
If I hold button in.. Will fully raise.
I am wondering if this is a linkage misalignment or excessive friction at the rough motion stage
This rough motion seems to be common, our's does it even after having the modification done and the mechanism joints do a lot of 'groaning' which I think could be the joints that have white nylon bushes.
Does anyone know of the correct lubrication for these nylon bushed bearings ?
 
Aug 6, 2013
11,964
16,585
Kendal, Cumbria
Funster No
27,352
MH
Le-Voyageur RX958 Pl
Exp
since 1999
If the beds are like mine each side has its own linear actuator (electric ram). Not only will the rams likely operate at marginally different speeds but the bed mechanism (scissor type in my case) will offer different resistance side to side. The 'bearings' used are often steel-on-steel or simple nylon sleeves. They are often not lubricated and alignment isn't too clever either. All in all I'd consider it a win if the bed is level at each end of its travel. Anything that happens during movement isn't really relevant. I do lubricate mine with general purpose grease (it can make nylon swell but that would simply take up some of the (normally excessive) clearance and the bed is noticeably smoother as a result. Probably only required once.
 

Join us or log in to post a reply.

To join in you must be a member of MotorhomeFun

Join MotorhomeFun

Join us, it quick and easy!

Log in

Already a member? Log in here.

Latest journal entries

Funsters who are viewing this thread

Back
Top