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Hi everyone I bought an Athearn SW1500 at a train fair and it ran well when tested but when I got it home to my layout it started to run erratically, so I took off the shell and gave it a little oil and as I was working in the oil I noticed the the turning of the motor becomes extremely laboured temporarily and then it makes a little "pop" sound and its turns fine again, This happens maybe once in 20 revolutions or so. Is it shagged?? I do not feel confident enough to open the differentials and have a look. Are these differentials still available? <br /> <br />Thanks for your help, I am very frustraded indeed. <br /> <br />[img]http://users.tpg.com.au/ucwepn/11-03-06_1657.jpg[/img]
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