[Healeys] Polarity

[Kees Oudesluijs]

The original pumps had a capacitor over the points which made them dual 
polarity. At a later stage SU changed the capacitor for a diode which 
made the pump polarity sensitive. If you remove the diode and fit a 
transil over the points the pump becomes dual polarity.

The very early pumps with the single points may not have had any 
capacitor or diode fitted, which would lead to spark erosion of the 
points. These were also dual polarity.

The later electronic/solid state versions are all polarity sensitive.

Kees Oudesluijs



Op 7-3-2020 om 14:49 schreef David P:
>
> SU fuel pumps are generally polarity sensitive...
>
>
> On 3/7/2020 1:18 AM, Kees Oudesluijs wrote:
>>
>> In addition to the article:
>>
>> -Change polarity to the radio if fitted. Some older radio's have a 
>> polarity switch.
>>
>> -Check if clock is polarity sensitive. Some older Smiths/Jaeger 
>> clocks are dual polarity. Later ones are polarity sentive.
>>
>> -Change over the wires from the Amp gauge.
>>
>>
>> Kees Oudesluijs
>>
>>
>>
>> Op 7-3-2020 om 04:48 schreef Max Byers:
>>>
>>> See attachment.
>>>
>>> Steve Byers
>>>
>>> HBJ8L/36666
>>>
>>> BJ8 Registry
>>>
>>> AHCA Delegate at Large
>>>
>>> Havelock, NC  USA
>>>
>>> *From:*Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of 
>>> *ahbn6--- via Healeys
>>> *Sent:* Friday, March 6, 2020 9:32 PM
>>> *To:* Healey List
>>> *Subject:* [Healeys] Polarity
>>>
>>> *Is there any step by instructions on how to change to negative ground?*
>>>
>>> **
>>>
>>> *John Sims*
>>>
>>> *www.healey6.com <http://www.healey6.com/>*
>>>
>>> *Matawan, NJ*
>>>
>>>
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>>
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> -- 
> Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World go here:WWW.PORTERBIKES.COM/
>
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