Which oil for CDM4 mechs? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th December 2006, 12:34 PM   #1
johnm is offline johnm  United Kingdom
diyAudio Member
 
johnm's Avatar
 
Join Date: Sep 2003
Location: Hampshire
Default Which oil for CDM4 mechs?

Hi there.

There have been a few references in the past to re-oiling the CDM4/19 (etc) mechs but nothing concrete. Someone mentioned clock oil a while back but what actually IS this? What viscocity etc?

I have a CDM4/22 in a Naim CDI which is working/tracking fine but the motor is slightly noisey now so I need to re-oil it. Can anyone recommend a suitable oil for this - something I might be able to buy easily at Halfords or similar here in the UK? Would good old 3-in-1 be OK or is this too thick for the motor?

Many thanks.

- John
  Reply With Quote
Old 12th December 2006, 04:27 PM   #2
diyAudio Member
 
Join Date: Jul 2003
Location: Bath, UK
Whatever you do, DONT use 3-in-1. It's a heavy, low-grade base oil diluted with kerosene (for penetrating qualities) - so it eventually dries out into a sticky, gungy mess

I've heard of using a good quality synthetic oils in other motors (eg Mobil-1 - if you have some lying about already for your car)
  Reply With Quote
Old 30th May 2007, 02:34 PM   #3
johnm is offline johnm  United Kingdom
diyAudio Member
 
johnm's Avatar
 
Join Date: Sep 2003
Location: Hampshire
Hi - many thanks for your reply. Sorry so late in replying but I haven't gotten around to dismantling my CDI yet.

So would Mobil-1 be OK for oiling the motor as well, or would I need some light grease for the thrust pad here?

Cheers,

- John
  Reply With Quote
Old 30th May 2007, 06:47 PM   #4
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
If you desire something fast and easy, get a small flask of oil for oil-free air compressors and air tools.
Plenty of places where you can buy it, an automobile parts and tools shop will have it.
__________________
The buck stops Here
  Reply With Quote
Old 30th May 2007, 06:54 PM   #5
diyAudio Member
 
Join Date: Jul 2003
Location: Bath, UK
john - I've used Mobil1 on CD motors (inc. the CDM9 in my Naim CD2) with no problem.

It only takes the merest drop, applied with a needle or similar - the stuff is thin and will creep anywhere, usually unwanted! I havent looked at teh thrust pad, but a light grease would make sense eg silicone-based - oil based ones are likely to attack the plastic.
  Reply With Quote
Old 30th May 2007, 09:42 PM   #6
diyAudio Member
 
musicomputer's Avatar
 
Join Date: Feb 2004
Location: Manchester, England
Are you sure that it's the motor causing the noise? It's more likely to be the disc clamp.

According the service manuals I have, the only things that should be lubricated in a Philips CDM are the two ball bearings that the swing arm pivots on. The recommended lubricant for that is "silicon oil 1000cts".

Best,
Paul
__________________
pure, perfect sound - forever
  Reply With Quote
Old 31st May 2007, 06:55 PM   #7
johnm is offline johnm  United Kingdom
diyAudio Member
 
johnm's Avatar
 
Join Date: Sep 2003
Location: Hampshire
As the CDM has been in use for about 15 years now I just assumed the motor bearing thrust pad might need lubricating now? Perhaps the transport is a little noisey compared to modern units. It's working fine at any rate.

I may just lubricate the ball bearing on the swing arm and leave it at that next time I have the machine apart for whatever reason.

Thanks for all the suggestions guys - much appreciated

- John
  Reply With Quote
Old 1st June 2007, 02:05 PM   #8
tubenut is offline tubenut  South Africa
diyAudio Member
 
tubenut's Avatar
 
Join Date: Nov 2002
Location: South Africa, Jhb
Quote:
Are you sure that it's the motor causing the noise? It's more likely to be the disc clamp.

Agreed. Clean the clamp and the ball and relube, you could use something as daft as a wee bit of petrolium jelly. If there is a little indentation in the pressure plate, sand it a little with very fine sand paper until the dent is no more.

If this has never been done on a wel used CDM4/19 I can almost guarantee a better sound afterwards too....

While you are there fill the clamp honeycomb with blue tack or similar.
__________________
Guillaume
Croak Audio Exploration
  Reply With Quote
Old 1st June 2007, 09:22 PM   #9
diyAudio Member
 
musicomputer's Avatar
 
Join Date: Feb 2004
Location: Manchester, England
Quote:
Clean the clamp and the ball and relube
Also, the spring that holds the clamp shut might be a little tired after 15 years and may need replacing.

Best,
Paul
__________________
pure, perfect sound - forever
  Reply With Quote
Old 4th June 2007, 07:40 PM   #10
johnm is offline johnm  United Kingdom
diyAudio Member
 
johnm's Avatar
 
Join Date: Sep 2003
Location: Hampshire
The mech used in my Naim CDI is - I believe - the CDM 4/22. It uses a lightweight magnetic clamp to hold the discs, not the usual disc tray type ala Phillips. It's a top loading machine.

The only two points which I believe may need attention are the laser swing arm pivot, and the motor bearing thrust pad. Reckon after 15 years of use I should give both a check and - if required - a lube.

Cheers,

- John
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Quick slipping belt fix for CD player mechs georgehifi Digital Source 8 13th October 2012 09:03 AM
CDM-4/19 Mechs for sale amc184 Swap Meet 5 22nd April 2010 05:11 AM
CDM1, or CDM4 pro, or CDM4/21 jovan Digital Source 7 27th February 2008 01:33 AM
Repairing CDM4/19 (with CDM4/31???) Shaun Digital Source 4 1st August 2003 12:29 PM


New To Site? Need Help?

All times are GMT. The time now is 06:45 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2