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Author Topic: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).  (Read 6429 times)

Online MVacs

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This is something we have seen a few times, and again today with a machine we had sold that came back a few months later.

When you recline the machine, this is supposed to happen:





However, on many we see, if you turn the machine on first, then try to recline it, or try to stand it up while it is still running, the mechanism doesn't move because it stays locked in place due to the suction. Sometimes, the actuator rod comes out of the circular wheel that drives the mechanism.

Sometimes, cleaning the mechanism and lubricating it cures it. Today we had one that showed no sign of mechanism wear, and worked perfectly when the machine was switched on after reclining it or standing it up. But powering it up first, then reclining it (as most people do) means it stayed locked in place. This isn't the first one we have seen that does this.

We usually get around this by fitting an after-market motor with slightly less power than the original. This reduces the suction at the carriage mechanism just that little bit that then allows the mechanism not to stay locked in one position. Hardly ideal is it?  :'(

We always put new motors in DC27's we sell (because we don't want them back under warranty as they are a pain to strip down). A few months ago, we fitted new YV-16K24ED (914779-06) genuine Dyson motors to some (because we happened to get some in a deal). This machine that came back was one fitted with a genuine motor. We are fitting a non-genuine motor to it tomorrow to hopefully cure it.

It is our opinion that this constitutes a design fault with DC27's. This was first touched upon here in 2011 in this topic. This may be why the DC27 had such a short production run and was rapidly replaced with the DC33 which reverted back to a similar carriage mechanism used in the previous DC04/7/14 machines.

Does anyone have any thoughts, experiences or opinions on this?

Offline Sleaford White

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #1 on: August 20, 2014, 06:06:42 PM »
I thought I'd look for this thread as I've just bought 2 DC27's very cheaply. In the 5 years I've been refurbing Dysons, I've never had a DC27. One I know the motor is knackered - can't be much different to a DC07/14/33 can it? The other one I bought off fleabay and it's head is buggered - is there much difference from a 14/07. They look a bit different in photos but I've never actually seen one.
In the aformentioned thread, Stuart reckons there is a fault with the carriage assembly. If I come across this snag, is it fixable?

Last question; If as Stuart says these machines are as Shite as he says, should I risk it by selling them on my stall, or should I fleabay them?

H

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #2 on: August 20, 2014, 11:12:51 PM »
I gave a way a working dc24 as I didnt trust it not to die shortly after selling it, the motor smelt slightly carboney too...

2 weeks later he said the brushroll crapped out on him... I just dont trust them! Had no comeback on the DC25 I refurbished though, wether it did die and they just didnt message me I dont know though...

I'd ebay it in a 'working but im no expert, sold as seen' basis and hope it goes for more than you spent on it in total! I'd want no comeback on one
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Online Parwaz7862

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #3 on: August 20, 2014, 11:18:21 PM »
Just today I was using my DC24 and my brushbar started rattling again, the change overvalue got stuck again, there was a slight motor burn smell and sound when I switched the vacuum on, then I vacuumed my bedroom with it and it was fine, I just hate how Dyson designed the DC24, the dc25 was more acceptable and works much better by miles. I still might sell my Dc24, but not sure now because of the motor burn sound and smell :/
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

Online MVacs

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #4 on: August 21, 2014, 01:21:33 PM »
One I know the motor is knackered - can't be much different to a DC07/14/33 can it?

Same.

The other one I bought off fleabay and it's head is buggered - is there much difference from a 14/07. They look a bit different in photos but I've never actually seen one.

Yes, they are different.

In the aformentioned thread, Stuart reckons there is a fault with the carriage assembly. If I come across this snag, is it fixable?

If you find a fix, I am all ears. We haven't.

Last question; If as Stuart says these machines are as Shite as he says, should I risk it by selling them on my stall, or should I fleabay them?

We fleabay our DC27's by auction without warranty. 

Offline brett83

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #5 on: September 26, 2014, 09:04:16 PM »
Whats the symptom of this fault, as I had a customer bring one in saying that the clutch does not turn on by itself when it is reclined.  She also said it seems to snag and try and lift itself on their carpet.

I'm just trying to take it apart for the first time and 1) it really is a b*gger to get the cover off the clutch because i cant even get the top brush cover off the head and 2) when I tested it i didn't seem to have anything wrong with it.

Would this fault cause this to happen ?

Thanks

Online MVacs

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #6 on: September 26, 2014, 09:44:47 PM »
The fault described here is nothing to do with the clutch. She probably has the clutch turned off. People do that.

Offline brett83

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Re: Possible Design Fault DC27 Carriage Mechanism (Switchover Valve).
« Reply #7 on: September 26, 2014, 10:59:22 PM »
 I've changed the clutch and its seems to now engage when its reclined.  I'm not sure what she was going on about when she said it was snagging, but it seems to be working fine now.

thanks


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