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Overdrive Pressure Test

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M

Mag9

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Hello
I have a pressure gauge to test the overdrive and was wondering if the ball and spring and valve are removed before attaching the gauge.
Thanks
 
What you need to do is best done with a spare valve cap. The spring and ball must remain functional and in place. Take the spare cap and drill a hole in the top, braze or weld an adapter to install a 0 to 500 psi gage in to the cap leaving the hole open to the gage. Just install this inplace of the unmodified cap. As you can see the cap has a recess in it that needs to remain intact for the spring and ball.
 

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Me being a refrigeration HVAC guy . I have a schrader fitting welded onto my plug so no need to change caps . Just take of the dust cover cap install gauge , check pressure đź‘Ť
 
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