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TR2/3/3A TR3 Oil Pressure Gauge

martx-5

Yoda
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I took apart my oil pressure gauge awhile back for general clean-up, along with all the other gauges. I figured that I should check the accuracy of the gauge. I started up the air compressor and had the gauge rigged up to it through my air blower. Solid connection...no possibility of leaks. As the pressure built up, I noticed that the readings on the oil pressure gauge are lower then that of the compressor gauge, which I know is fairly accurate. At 60 psi on the compressor, I'm showing about 45 psi on the OP gauge. Can this be adjusted and what is the procedure??
 
OP
martx-5

martx-5

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OK, I got it figured out and pretty much repaired. There is a wire size arm coming off the end of the bourdon tube that activates a lever that is attached to the indicating needle. That lever and needle has a spring on it which returns it to the zero peg position. I tweeked the wire arm from the bourdon tube so that the spring JUST returned the indicator to the zero position against the peg. When I retested, I was within five pounds of what the compressor gauge read pretty much along the scale of the gauge...up to about 90 psi.

This is certainly close enough for me. :yesnod:
 

TR3driver

Great Pumpkin - R.I.P
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Cool.

Thanks for the tip !
 
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