SBC! - reset

[Xtractorfan]

Hmm we could be rocking the boat by going off topic, but I see your point.

 

[undeckedhomer]

Yikes strange things are happening once again on the forum... I would expect Malcolm has asked for it to be removed..but interesting thread so far.

A figment of your imagination

 

[Naraic]

Back on topic please.

 

[DIYMAN]

OK, back on topic.

Trolley buses and diesel electric trains are driven by d.c. motors, a series wound d.c. motor has a massive starting torque. Quick review of brushless d.c. motors below:

What this means is that a brushless motor has fewer parts that can wear out and need to be replaced. With a brushless DC motor, also called a BLDC motor, there is never any need to be concerned about the condition of the brushes, which could require that the motor be taken out of service and restored. Brushless motors can be just as effective for high –speed operation as a brushed motor, if not more, but because there are no brushes to replace, a brushless can have a life expectancy in excess of 10,000 hours.

For a project where a motor is only going to be used for a short time, a brushed DC motor may be sufficient and cost effective. But if it is going to be in continuous use, especially if it's going to be required to take on a lot of power, a brushless motor is a much better choice. The amount of money a company can save by having to replace or repair its motors less often far outweighs the difference in cost between brush DC motors and brushless DC motors, even considering the cost to own and maintain a motor controller, which is required to direct power to the brushless motor, a requirement that the brush DC motor doesn't have. Other benefits to the brushless motor include quieter running, no sparks from friction against a commutator and less electromagnetic interference.

Brushless motors can be used in a wide variety of applications. Low power brushless motors can be used to power turntables or radio controlled model airplanes, while high power brushless motors can be used for electric vehicles and industrial machinery. Other common applications for these motors include computer parts such as CD-ROM players and PC cooling fans. If you are already using a brush motor for a given application, you can usually easily replace it with a brushless motor, providing you use the same wattage and size as your original motor. Use the convenient search bar provided to find exactly the brushless DC motor you need.

 

[television]

Thank you for the above, the one thing that BLDC motor does need is an inverter controller as they are effectively 3 phase. Trains and other things run on very high voltages,and this can make an enormous difference. In a car we only have 12volt and the cost is much higher than for a brush motor.

The direct drive turntables have very little power and cannot start without the platter fitted as nothing to move the shaft to the next field. Obviously this is not a problem on the real heavy stuff. Sure many washing machines use BLDC motors and are more controllable, or controllable for a less cost than mechanical components, and again they get 235 volts AC to start with.

The SBC motors on the outside look to be conventional motors and the same as on the ABS pumps, I have just thrown one away so I cannot check it.

 

[Alex Crow]

I am sure SBC pump motors do indeed have brushes, as above.

Why anyone would contemplate a DIY project to fiddle with the innards of these units in order to 'repair' them is beyond me - I think any talk of changing the brushes is misguided and foolhardy, the risks are too high.

However, stripping them down for inspection and to learn more about them I do condone, but throw them away afterwards please.

 

[V6Matty]

if anyone has an old unit that they are going to throw away, let me know as my friend (Engineer) has worked on SBC systems in other applications and would quite like to have a look at a Merc unit to see how different it is compaired to units he and his company have designed.

 

[Johnlynham]

Had my 2002 e240 SBC pump replaced last year FOC in Belfast pumps have 10 Year warranty dealers in south of Ireland wanted full coast

 

[S.Speed]

Had my 2002 e240 SBC pump replaced last year FOC in Belfast pumps have 10 Year warranty dealers in south of Ireland wanted full coast

Just a lateral thought..
All those of you unfortunate enough to have SBC..
Why not have a little trip to the south of Ireland when your pumps start to fail ???

 

[television]

Just a lateral thought..
All those of you unfortunate enough to have SBC..
Why not have a little trip to the south of Ireland when your pumps start to fail ???

The trouble is you do not know when it starts to fail, the red dash comes up and that is it.

I have never heard of anyone saying that the pump starts to get noisy when the time is up.

The piece of water is expensive to cross as well, not easy is it

 

[Frontstep]

SBC Tours
Mercedes specialist tour company we bring your SBC time out earlier and you get a holiday

 

[Acms-Mercedes Marc]

SBC

SBC!! You wouldn’t jump out of a plane using a bedsheet with all 4 corners tied together with string & call it a Parachute? So why would Anyone try to reset a vital piece of equipment as an SBC??
As an MB Indie I recommend to all my customers with SBC fitted to have a brakefluid change every Two years then if they have any SBC problems MB will look more favourably at customer assistance,
Even if servicing is done elsewhere, not a guarantee but does give some success in my experience.
If service brake warning light is on my advise is don’t carry on driving the car, as you are endangering your own safety, all other pedestrians & motorists alike!
If the system does fail whilst driving at anything over 30mph, it’s like trying to stop a truck with bicycle brakes.

 

[_Taz_]

Just to revive this a bit,

I've booked my bus in with a DEALER, only the devil himself knows what will happen in their hands, but at a £220 all in INC VAT + a wash & hoover while I wait ( fixed price, as I said I don't want any bollox off them ), it's the 1st time I've used a dealer other than when I had a parking sensor go down ( before I made my own homebrew star ).

This is a LOT for a brake fluid change, however It does add leverage should my SBC fail later ( I hope, fingers crossed, wishing, lucky heather etc... ).

Be rude not to test drive an E63 for them 2 hours i'm there

Point is, I'm all for DIY etc, but Merc have made this such a b'stard system, that if you ever messed about & got it wrong, the liability is way too much of a risk.

 

[Frontstep]

Thats a lot but as you say it may help if you get the light of doom.

 

[turbopete]

( before I made my own homebrew star ).

from what?

 

[_Taz_]

@ Pete, I can PM if you wish pal

Yup, it's quite steep, but in this instance a bit of a necessity.

 

[_Taz_]

kind of a result, although some aggro' for me...

Took it down this morning for the SBC change @ the dealer...

about an hour later it's in the car park...

cool, it must be done... erm' no, the fitter was messing about with a bleed nipple & couldn't get it undone.... gave up & returned the car...

I got charge £66 for this... hmmm

So, fair dues, probably concerned the rear nipple would snap, he stopped...

went home ( thankfully 10 mins away ), under some ramps, small tap with a hammer, some pen fluid & a gentle bit of heat, hey presto, undone in 5 mins.

Checked all the other 3 were free.

Back to the dealer, whom I phoned up & he was quite surprised how quick I was.. ( bearing in mind all he could offer was a £550 quote for removal of both calipers ???!!?? & bleed nipple, which turns out they didn't even have in stock ! , good job i am careful ! )

looking a bit ruffled, they settled on a £170all in for me & waived my previous taking. Not too bad I feel (STILL WAY WAY overpriced, but hey ).

At least I have a MB tick in the box for the fluid, which was very brown when I came out & looked like it had never been done, which probably contributes to failed SBC units...

knowing my luck, my SBC will fail next week !!

HTH

 

[V6Matty]

Taz, may be a daft question but does the bleed need to be done via star or can it be done without, just thinking i have a service in a couple of weeks where he will be doing the normal filters and fluids as well as an ATF change and new tires all round, just like saving pennys where i can.

 

[_Taz_]

I can EASILY be done without STAR, using a simple pressure bleeder.

The only benefit of using STAR ( which I can do at home anyways ) is that it uses the pump to depressurise the accumulator & do a proper fluid change.

You still need a pressure bleeder with STAR ( watched the lad do it about 30mins ago ) , all in MB branded fancy box...

I just wanted a tick in the box to say it's been done by MB.

It took their tech about 45mins to do my car ( once i undid all the bleed nipples for him lol ! )

ATF is easy, done it on my W211 & the rear diff also.

hope this helps pal

 

[V6Matty]

great thanks Taz, i'm not mechanically minded really so dont like doing much work on my car unless i've spent time with someone that knows what their doing first :lol: big wuss me