[…] Besides checking for temperature differences, accumulators can be verified by observing the fluid pressure gauge as the system is turned off.  Often the accumulators have manual or solenoid operated valves to release their fluid back to tank when the system is turned off. As the fluid leaves the accumulators back through the system and to tank, the system pressure will slowly drop until all fluid is out of the accumulators. At this point, the system pressure gauge will rapidly drop to 0 PSI. The last pressure reading, before the gauge needle went to 0 PSI, is very close to the pre-charge pressure. You can see a video of this demonstration. Click here. […]
[…] Besides checking for temperature differences, accumulators can be verified by observing the fluid pressure gauge as the system is turned off.  Often the accumulators have manual or solenoid operated valves to release their fluid back to tank when the system is turned off. As the fluid leaves the accumulators back through the system and to tank, the system pressure will slowly drop until all fluid is out of the accumulators. At this point, the system pressure gauge will rapidly drop to 0 PSI. The last pressure reading, before the gauge needle went to 0 PSI, is very close to the pre-charge pressure. You can see a video of this demonstration. Click here. […]