Hi All, anyone familiar with these type of bottle jacks, it’s been filled with hydraulic oil, attempted bleeding air as described in other links to no avail, piston will not retract, looking for parts breakdown and any other advice.
Thanks
Geo🇺🇸
If you filled the oil reservoir with ram in the up position, there is no place for the oil in the ram to go when attempting to lower. Drain some oil from the reservoir, then try to lower ram.
It wouldn’t Close even when it was low on oil , any thoughts on how I can retract the piston, even if i drain some oil out, does this pump separate at the top? I obviously know little about it.
Geo🇺🇸
The oil to the ram enter at/near the bottom of ram. Place problem jack under a jacked up vehicle with the ram touching frame and the valve in the lower position. Lowering frame should lower the ram. If not, lowering oil path has an obstruction. Will need to be disassembled to repair.
I have a harbor freight 'pancake' compressor that's several years old. It takes a little while to get to full capacity / shut off (not sure if it's slower than when new... didn't time it back then).
Any recommendations on care? recently, it is sometimes making a different sound as it's running and shifting between the 2 sounds as it fills the tank. Took the cover off and didn't see anything different happening when making the 2 different sounds. take the top off the compressor cylinder and put oil (type?) in there?
Or leave it alone till it dies? : )
[img]https://cimg0.ibsrv.net/gimg/www.doityourselft.com-vbulletin/768x1365/2023_05_12_12_36_17_4d2ed655c8e3ea8a7e8d51a0afcb0abedefaf631.jpg[/img]
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I have this 80 volt lithium battery that the charger won't charge. I assume it is because the charger won't charge if the battery is too low.
I am aware of the method of placing a fully charged battery in parallel with the bad one for a few seconds to put enough charge on the bad battery to allow the charger to charge it. Unfortunately I don't have another battery. Also, the bad battery measures only 3.5 volts.
I do have a 30 volt power supply but when I put it across the bad battery no current flows even though the terminals measure 30 volts. I let it sit that way overnight but the bad battery still measured 3.5 volts when I removed the power supply. Seems to me something was blocking the flow of current into the battery.
I opened it up and there are 20 batteries of the 18650 variety. They all have multiple thin wires going to a circuit board. The circuit board must have over 100 surface mount chips and transistors.
So I'm looking for ideas for what all the circuitry is for.
Anybody have any ideas?
Thanks,
Pete
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05-27-23, 02:12 PM
