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Black & Decker CMM1000 5HP cordless lawn mower battery service

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Black & Decker CMM1000 5HP cordless lawn mower battery service A. H. G. 04-22-2008
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Posted by A. H. G. on April 23, 2008, 9:13 pm
OK, I toke the lawn mower apart.

Battery: two in series, 12V 17.2AH sealed lead acid battery.
Yuasa-Exide, Reading, PA. 19612, Part Number YLM18-12.

The motor top has two copper type of brushings. The brushing holder is
spring loaded, and screw mounted.
It seems the brushing can be replaced. The width of the brushing is half
inch.
Any where I can get replacement brushings?

Finally able to unscrew the blade (18 inches long), counter-wise to unscrew.
Cut my knuckle.
Will get a replacement blade at Amazon.com.

Still do not know best to test if the motor or battery has problem?
Thank you all for your advise.


Posted by Tony Hwang on April 23, 2008, 9:34 pm
A. H. G. wrote:
> OK, I toke the lawn mower apart.
>
> Battery: two in series, 12V 17.2AH sealed lead acid battery.
> Yuasa-Exide, Reading, PA. 19612, Part Number YLM18-12.
>
> The motor top has two copper type of brushings. The brushing holder is
> spring loaded, and screw mounted.
> It seems the brushing can be replaced. The width of the brushing is half
> inch.
> Any where I can get replacement brushings?
>
> Finally able to unscrew the blade (18 inches long), counter-wise to
> unscrew. Cut my knuckle.
> Will get a replacement blade at Amazon.com.
>
> Still do not know best to test if the motor or battery has problem?
> Thank you all for your advise.
>
Hi,
Battery can be tested with meter and a 12V light bulbs.
Are brushes worn out? Is the commutator show a sign of groove?

Posted by A. H. G. on April 25, 2008, 12:45 pm

> Hi,
> Battery can be tested with meter and a 12V light bulbs.
> Are brushes worn out? Is the commutator show a sign of groove?

Well, brushes seems still quite a bit left. But if I know where to get new
ones, I would easily replace it.
The motor commuatator looks OK. I know of wipe and clean it a bit.
Meter measurement of batteries seems OK. But cannot test how strong is the
charged current.


Posted by A. H. G. on April 27, 2008, 4:42 pm
I am seeking motor brushing to replace this pair.
This is spring-loaded, and can be remove by unscrewing the plastic holder.
The brush width is half inch.

However, went to Home Depot & other local home improvement hardware store,
they sell none of this.

Anywhere I can find this in Silicon Valley?


Posted by krw on April 27, 2008, 6:57 pm
no.spam@no.spam.com says...
> I am seeking motor brushing to replace this pair.
> This is spring-loaded, and can be remove by unscrewing the plastic holder.
> The brush width is half inch.
>
> However, went to Home Depot & other local home improvement hardware store,
> they sell none of this.

Have you tried B&D's web site?

> Anywhere I can find this in Silicon Valley?

A motor, power tool or small appliance repair shop would likely be
the best place.

--
Keith

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