Hydraulic jacks are used for lifting heavy objects such as cars, and they are a staple tool in any auto repair shop. Their operation relies on a fluid that, when pressurized, raises a cylinder, enabling the lifting of substantial weights. You can purchase a hydraulic jack and specialized oil at any auto parts store. Follow our guidelines to correctly refill the oil in your hydraulic jack.
Determine the Type of Hydraulic Jack
Step 1. Choose between a floor jack and a bottle jack.
Decide whether you need a floor jack or a bottle jack. In a floor jack, the cylinder moves horizontally, while in a bottle jack, it moves vertically.
How to Add Oil to a Floor Hydraulic Jack
Step 1. Prepare the jack.
Ensure that the jack is completely lowered. Turn the release valve counterclockwise to lower it fully.
Step 2. Locate the oil fill port.
Identify the location of the oil fill port, which is usually found on the hydraulic fluid reservoir. This reservoir is a vertical cylinder mounted on a flat base of the jack, and the fill port is located at the bottom of the cylinder.
Step 3. Fill the oil.
- Remove the plug or bolt from the fill port.
- Insert the nozzle of the oil can into this opening.
- Begin pouring oil into the port.
- Stop pouring when the oil starts to overflow from the port.
Step 4. Close the port.
Close the port by replacing the plug or bolt.
How to Add Oil to a Bottle Hydraulic Jack
Step 1. Prepare the jack.
Prepare the jack by ensuring it is fully lowered. Turn the release valve counterclockwise to achieve this.
Step 2. Find the fill hole.
Locate the fill hole, which is found on the hydraulic fluid reservoir. This reservoir is a large cylinder that should have a plug or bolt positioned approximately one-third down from the top of the jack.
Step 3. Fill the oil.
- Remove the plug or bolt from the fill hole.
- Insert the nozzle of the oil can into this opening.
- Begin pouring oil into the fill hole.
- Stop filling when the oil level rises to about 0.3 cm below the edge of the fill hole.
Step 4. Close the fill hole.
Close the fill hole by replacing the plug or bolt.
