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Author Topic: rap5 pressure gauge problems  (Read 1917 times)

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Offline spaspeckerthedull

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rap5 pressure gauge problems
« on: September 05, 2012, 03:10:43 PM »
hi guys - help required

rap5 gen2. rap4 pressure gauge. When gauge is fitted it shows 5.6, and no amount of moving the velocity screw will change this, in any direction. Check reading, pull trigger and gauge zeros then immediately returns to 5.6 and holds. No amount of moving velocity screw in any direction will change this

solutions tried

changed all core o-rings including velocity chamber
tried different gas tubes
everything lubed as it should be

any ideas?