Vacuum pump issues
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The vacuum pump hasn’t been used for over a year, and it’s difficult to turn it by hand – how should this be dealt with?
First, soak the turntable in descaling agent; if that doesn’t work, then check the bearings and packing (this step can be skipped if it’s a mechanical seal)
It’s best to disassemble the pump, clean and reassemble it, and then use it again.
It should be overhauled first before being used again.
After disassembling it for cleaning, reinstall it; otherwise, the pump may be damaged
Perform a major overhaul to clean, inspect, and eliminate defects.
Perform a thorough maintenance check, especially for the corroded parts; replace those that are no longer functional as soon as possible
The two positive displacement pumps in series in our laboratory are three years old, and they haven’t been repaired yet
It’s best to take it apart and check it thoroughly; after being unused for a long time, there may be some issues that aren’t noticeable under normal circumstances
It is recommended to disassemble it for inspection and replace the parts that are severely corroded, especially the bearings.
Open the intake valve, manually turn the shaft, activate the air purge valve, and drive it with the motor. After running for several hours, drain the pump oil and fill it with new oil (sliding vane vacuum pump). In fact, according to mechanical principles, as long as the pump can be rotated, that’s generally sufficient; it doesn’t seem to have any components within it that are prone to corrosion. (Prolonged disuse may lead to aging of rubber components.) It is not recommended to disassemble and repair the equipment without a thorough understanding of its structure.