Doktor Booth used the phrase "direct reading Bourdon pressure gauge"
in a post. Sweet.

AZ Bob 
'77 300D 137K
Litchfield Park, AZ

On 8/5/05, Marshall Booth <[EMAIL PROTECTED]> wrote:
> The direct reading Bourdon oil pressure gauges have a tendency to 
> "chatter" under some conditions. It causes NO harm, but is annoying. 
> Mercedes sells a small restricter that can be placed in the line that 
> will damp the chatter. I will SEE if I can find a part number.
> 
> Oil Pressure Restricter, MB part number: 123 542 00 74
> 
> There are other potential causes for the gauge to oscillate - like the 
> oil pressure actually going up and down (a blown head gasket between one 
> cylinder and an oil passage CAN cause that, but oil consumption would 
> skyrocket) and I THINK that seriously degraded "O" rings on the oil 
> filter stem shaft might sometimes cause that - they will result in 
> lowered oil pressure reading, but I'm NOT sure about pressure oscillation.
> 
> Marshall
> -- 
>         Marshall Booth (who doesn't respond to unsigned questions)
>        "der Dieseling Doktor" [EMAIL PROTECTED]
> '87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0 
> 159Kmi, '87 190D 2.5 turbo 234kmi
>        Diesel Technical Advisor MBCA, member GWSection
>      http://www.dhc.net/~pmhack/mercedes/mbooth1.htm
> 
> 
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