Panasonic K deck grating sound - UK Vintage Radio Repair and Restoration Discussion Forum

IanNVJ35 · 4th Apr 2016, 10:06 am

I have replaced the little drive dog in quite a few Panasonic K deck machines - an easy task. However after replacing the last couple, both machines (not the same model) make a 'rough cog' noise as if teeth of a cog are touching/snagging something. Both machines work fine and don't bind or stop, however apart from changing the little plastic bit I did nothing else.

Does anyone remember coming across this issue before?

I thought I would ask before spending time chasing it down and pulling things apart again. The last machine I did I stripped the slider down and re-greased everything but the sound was just the same. Something to do with the motor area I feel sure, but I am not sure what.

HamishBoxer · 4th Apr 2016, 11:40 am

Is the drive dog you replaced on the end of the motor? As that coupling as I call it splits.

IanNVJ35 · 4th Apr 2016, 12:23 pm

It was the little plastic part that pushes onto the motor shaft that slips into the spiral drive that I replaced.

IanNVJ35 · 4th Apr 2016, 9:54 pm

Now fixed. This one is worth remembering - the little push on plastic part has play on the shafts (due to being a little bit thinner than the original) so a tiny piece of electronic tape wrapped around prior to pushing the spiral on has eliminated the noise.

4th Apr 2016, 10:06 am	#1
IanNVJ35 Heptode Join Date: Mar 2010 Location: Hemel Hempstead, Hertfordshire, UK. Posts: 848	Panasonic K deck grating sound I have replaced the little drive dog in quite a few Panasonic K deck machines - an easy task. However after replacing the last couple, both machines (not the same model) make a 'rough cog' noise as if teeth of a cog are touching/snagging something. Both machines work fine and don't bind or stop, however apart from changing the little plastic bit I did nothing else. Does anyone remember coming across this issue before? I thought I would ask before spending time chasing it down and pulling things apart again. The last machine I did I stripped the slider down and re-greased everything but the sound was just the same. Something to do with the motor area I feel sure, but I am not sure what.

4th Apr 2016, 11:40 am	#2
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,935	Re: Panasonic K deck grating sound Is the drive dog you replaced on the end of the motor? As that coupling as I call it splits. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

4th Apr 2016, 12:23 pm	#3
IanNVJ35 Heptode Join Date: Mar 2010 Location: Hemel Hempstead, Hertfordshire, UK. Posts: 848	Re: Panasonic K deck grating sound It was the little plastic part that pushes onto the motor shaft that slips into the spiral drive that I replaced.

4th Apr 2016, 9:54 pm	#4
IanNVJ35 Heptode Join Date: Mar 2010 Location: Hemel Hempstead, Hertfordshire, UK. Posts: 848	Re: Panasonic K deck grating sound Now fixed. This one is worth remembering - the little push on plastic part has play on the shafts (due to being a little bit thinner than the original) so a tiny piece of electronic tape wrapped around prior to pushing the spiral on has eliminated the noise.