brushed motor probs

[millser]

hi all

when running my car after about 3mins the motor unsolders it self. its a v brushed 11x1 running in a buggy

hope someone can help

simon

[ch!3f]

hi bud i take it that it gets very hot then does the armature spin freely in the can?also what car are you running it in and what gear ratio spur pinion.

[millser]

is get hot but not silly hot, running a tlr 22, tried lots of different gearing

[rondoolaa]

just a thought but maybe your just not getting a good solder joint, use some flux paste on both ends your soldering... i had my brushed motor reach 120 degrees and the joints never came unsoldered,

[millser]

been doing that for years never had it happen before

[pugs]

Do's the motor need skimming and new brushes? if so that can generate heat if the gearing etc is ok and sticky brushes can cause excessive comm wear quickly and heat