[Healeys] BJ8 tach disassembly

Michael Salter michael.salter at gmail.com
Tue Mar 5 21:20:33 MST 2019


Yes Tom, The paint on the face and inner rim is easily damaged and I would
recommend extreme care with any solvent.
( Don't ask me how I know :-(  )

M


On Wed, Mar 6, 2019 at 5:13 PM Tom <ah3000me at gmail.com> wrote:

> Michael, Mike, Steve,
>
> Thanks for your comments!
>
> Quick question...   can a solvent damage the face?    I think I'd be
> better off damaging the glass than damaging the face.
>
> - Tom
>
>
> On Tue, Mar 5, 2019 at 7:42 PM BJ8Healeys <sbyers at ec.rr.com> wrote:
>
>> I dribbled a solvent sparingly (acetone or 3M adhesive remover, I forget
>> which -- or maybe both) around the edges of the glass.  Eventually the bond
>> released.
>>
>>
>>
>> Steve Byers
>>
>> HBJ8L/36666
>>
>> BJ8 Registry
>>
>> AHCA Delegate at Large
>>
>> Havelock, NC
>>
>>
>>
>>
>>
>> *From:* Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of *Michael
>> Salter
>> *Sent:* Tuesday, March 05, 2019 3:48 PM
>> *To:* Tom
>> *Cc:* Healey Mail List
>> *Subject:* Re: [Healeys] BJ8 tach disassembly
>>
>>
>>
>> Hi Tom,
>>
>> What you have encountered is not uncommon. The manufacturers seemed to
>> use an adhesive of some sort to secure the rim and the glass in position
>> and it dries out and becomes very hard.
>>
>> I would recommend putting the 2 small screws back in as the mechanism
>> does not have to come out at this stage.
>>
>> You have to very gently pry the glass and inner rim, which is under the
>> glass to get it out.
>>
>> You need to get a blade under the edge of the inner rim to avoid chipping
>> the glass.
>>
>> As I recall there is a slot in the case that you can use as a starting
>> point.
>>
>> Take your time and gently work away at it ... it will move eventually.
>>
>>
>>
>> M
>>
>>
>>
>> On Wed, Mar 6, 2019 at 9:15 AM Tom <ah3000me at gmail.com> wrote:
>>
>> Hi everyone,
>>
>>
>>
>> I have some white dust inside the BJ8 tach that I'd like to clean up.
>> I found disassembly instruction on John Simm's site.  After removing the
>> trim ring, and undoing the two screws holding the mechanism to the case,
>> the glass face is firmly stuck to the case.
>>
>>
>>
>> If I can pop the glass face off, I can easily clean it with a can of
>> compressed air.  But the glass face is stuck, and I don't want to break
>> something.   Anyone have any ideas how to do this?
>>
>>
>>
>> thanks again,
>>
>>
>>
>> Tom
>>
>>
>>
>>
>>
>>
>>
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