{"id":8981,"date":"2022-08-03T01:27:48","date_gmt":"2022-08-03T01:27:48","guid":{"rendered":"https:\/\/notsealed.com\/?p=8981"},"modified":"2022-08-03T01:27:50","modified_gmt":"2022-08-03T01:27:50","slug":"how-to-fix-a-hydraulic-jack-problems-and-solutions","status":"publish","type":"post","link":"https:\/\/notsealed.com\/how-to-fix-a-hydraulic-jack-problems-and-solutions.html","title":{"rendered":"How to Fix a Hydraulic Jack Problems and Solutions"},"content":{"rendered":"\n

Hydraulic jacks come in many forms and sizes. The two main types I use are the bottle jack and the hydraulic car jack, aka trolley jack.<\/p>\n\n\n\n

Most car service centers and home handymen will use a trolley jack to work on their vehicles. Over time if the jacks are not maintained they will fail. The trolley jack is just a bottle jack on its side.<\/p>\n\n\n\n

In this post, we will go over how to fix a floor jack that won’t lift and what causes them to fail. This is a jack I located in a scrap yard that wasn’t holding pressure. Often it will be a quick fix like a top-up of hydraulic fluid. <\/p>\n\n\n\n

How to fix a hydraulic jack<\/h2>\n\n\n\n

If your hydraulic jack is not working it is best to first clean the outside of the jack and drain the internal jack oil. This can be done by locating the rubber plug and removing it. Some jacks may have a small screw in the body of the jack housing that can be unscrewed.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Once this plug is removed drain all of the oil and dispose of it.<\/p>\n\n\n\n

Use a small tube and funnel to top up the hydraulic jack. I have found that a syringe with a small tube works the best.<\/p>\n\n\n\n

Top up the hydraulic jack with jack oil or transmission fluid. Don’t use any other fluid like brake fluid or engine oil. It will damage your bottle jack.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

The correct oil level should be shown on the bottle jack near the nameplate. For trolley jacks, the oil level will be at the base of the rubber plug or screw. If there is too much fluid it will over-pressurize the system and leak out the seals.<\/p>\n\n\n\n

Leave the oil fill plug off at this stage and open the air bleed screw valve. This is the screw that will lower the trolley jack. Make sure it is fully lowered before bleeding the system. You will need to now pump the jack at least 10 times. The jack should not rise up but will purge the air out of the system.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Close the air bleed valve and pump up the jack to full height. Make sure the hydraulic jack can reach the full height. If not it will need more fluid. Open the air drain valve and lower the jack. Top up again and bleed the system as before.<\/p>\n\n\n\n

Reinstall the fill plug and your bottle jack is now ready for use. Congratulations you have now fixed a hydraulic jack.<\/p>\n\n\n\n

Check out our video on how to top up a hydraulic car jack with transmission fluid.<\/em><\/strong><\/p>\n\n\n\n

\n