Electric Mower Switch

Reply

  #1  
Old 09-03-08, 03:34 AM
Member
Thread Starter
Join Date: Sep 2008
Posts: 1
Electric Mower Switch

I have a Black& Decker MM525 electric mower. The plastic handle that switches the machine on an off via P button switch was not working properly so I opened the assembley and discovered that the plastic pin around which the handle rotates was broken. I replaced it with a screw and closed the assembley. The handle worked fine.

However when I started the mower the P button switch (part# 681064-01) started heating up and gave out smoke.
I again opened the assembley and noticed that one terminal of the switch with a black wire had melted.
I am wondering what has caused the switch to heat up. I have ordered a replacement but do not want the new switch to burn out too. I am not an electrician and will greatly appreciate any suggestion/advice from members.


thanks
 
Sponsored Links
  #2  
Old 09-03-08, 03:50 AM
e.carson's Avatar
Member
Join Date: Sep 2008
Location: Fort Drum, NY
Posts: 6
In electrical system heat is generated when current encounters resistance. This would lead me to believe that either the contacts within the switch were dirty and there was only a small surface touching, generating heat, or that after the motor was started the contacts were separated enough to draw an arc. This may have to do with the pivot point replacement. Make sure that the handle fully depresses the switch.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes