Top Answer
User Avatar
Wiki User
Answered 2010-09-05 21:22:36
How to add hydraulic jack oil to an hydraulic jack (floor jack or bottle jack).First, don't open the Check Valves!The most common mistake with a floor jack is to open one of the check valves (or their covers) instead of actually finding the fluid reservoir plug. Be sure you have found the filler hole (which can be very tricky to find on an oily old jack -- it's probably a small rubber plug that might even be painted the same color as the rest of your jack, hiding on the housing of the main hydraulic ram, NOT on the base. The screw/bolt heads on the base are the check valves. If you open a check valve, the springs and check balls might come out under pressure, and your jack won't ever work again unless you can find them and put them back in the right places

If your jack needs oil, even after a couple of years, it probably also needs new seals. Adding oil might let you use it a while longer, but you should probably replace the seals (or if it's a cheap Chinese/Taiwanese jack, just get a new jack). American- or Japanese-made jacks are probably worth resealing. Please always use jack stands so when the seals really blow out you don't end up crushed.

You're probably going to just put jack oil in anyway (or maybe you did replace the seals and now you need to put jack oil in), so here's how to do it:

  1. Use Hydraulic Jack Oil (available at auto parts stores). Do not use brake fluid, which will turn the seals into useless cheese.
  2. Be sure you have found the oil reservoir hole, not one of the check valves. Do all the following work with the jack rightside up (and don't store the jack upside down or on its side).
  3. Clean the plug and jack body around the hole. Any debris in the oil can easily cause damage later.
  4. Release the valve/lower the jack (turn the jack handle counterclockwise).
  5. Unscrew or pry out the plug as appropriate. Fill the reservoir. A tiny funnel will probably make this a LOT easier).
    1. Close the valve and raise the jack slowly enough to not blast oil back out the hole. The reservoir level will go down, which is normal, and you shouldn't add oil now.
    2. Slowly lower the jack (again, just don't blast a bunch of oil back out the hole). Air bubbles may come out, causing a few drips of oil to come out too, in which case you should add oil until the reservoir is full, then go back to the previous step until you can lower the jack slowly without a bunch of bubbling.
  6. Bleed the air out of the system:
  7. Re-plug the filler hole, test out the jack, and you're done, although you should still replace the leaking seals if you didn't already.

Remember to always work on hard, level ground, use jack stands, chock the wheels, and set the parking brake.

User Avatar

User Avatar
Answered 2020-06-30 14:33:32

do you need to fill the hydraulic cylinder all the way up with jack fluid or leave some air in it?

User Avatar

Your Answer


Still Have Questions?

Related Questions

How do you add hydraulic fluid to hydraulic pump in the trunk?

Hydraulic fluid should be poured in the oil tank.

How do you add hydraulic fluid to Porsche convertible top motor?

You can add hydraulic fluid to Porsche convertible top motor by popping open your engine hood and then pouring the hydraulic fluid into the appropriate compartment.

Were is the hydraulic filter on ford 2000 tractor?

under the seat were do you add the hydraulic fluid

Where do you add hydraulic fluid to a ford 4610?

In a Ford 4610, you need to add the hydraulic fluid to the rear axle. The Ford 4610 is a 1989 tractor that retailed at close to $19,000.

Where do you add transmission fluid to a Honda Accord?

where do you add the transmission fluid in a 1996 Honda accord 4 cylinderAnswerwhere do you add the transmission fluid in a 1996 Honda accord 4 cylinder

Where do you add fluid for clutch slave cylinder?

In the master cylinder

Where do I add brake fluid?

This depends on what type of vehicle that you have. But in most vehicles you would add the brake fluid to the master cylinder. This can be located on the firewall of your vehicle. Do not confuse a clutch master cylinder with the brake.Make sure you add the fluid to the brake cylinder.

How to Add hydraulic fluid to barber chair?

you first buy the fluid, than you must fill the chair with the fluid

Where do you add hydraulic fluid to a ford 4610 tractor?

in the back axle

Where do you add clutch fluid on a Mazda 121?

The clutch hydraulic fluid reservoir for a Mazda 121 is located next to the brake booster and brake master cylinder. The reservoir is small and round and is close to the driver side fender.

How do you add hydraulic fluid to backhoe?

Depends on which machine, I drove many and do remember they all had an easily accessible hydraulic tank.

How do you add brake fluid to the slave cylinder in a 1993 Escort?

You don't. You add it to the master cylinder and bleed the brakes.

How do you add hydraulic fluid to a hydraulic floor jack?

Follow this link (or copy and paste into your browser's address bar): then scroll about halfway down to find the instructions you seek. The task is a bit easier with a very small funnel that fits into the fluid reservoir hole.

How do I add brake fluid to a 2005 jeep liberty?

Remove the fill cap and add it at the brake fluid master cylinder reservoir. Located on or near the master cylinder.

When should you add break fluid?

When your master cylinder is low you either have a leak or your brake pads are worn. Inspect the system for a leak and inspect your pads before adding fluid. If all is well add fluid when it is at the add mark on the master cylinder. Use only the approved fluid listed on the master cylinder. Normally DOT3.

Where to add clutch fluid in 1988 F 250?

The fluid for the clutch comes from the brake fluid. After the brake master cylinder, there is a clutch master cylinder which takes fluid from the brakes. Fill up the Brake master cylinder.

How do you add hydraulic clutch fluid on a 2000 miata?

Should be next to the brake fluid cup. DJ FLIP

Where do you add brake fluid to 1991 tercel?

in the master cylinder

How do you adjust a hydraulic clutch in a 1999 Saturn sl?

The clutch is not adjustable unfortuneately..You can add fluid Beside the brake master cylinder there is a reservoir.. Otherwise It must be replaced It also cannot be bled if the fluid has run out Sorry replace is the only fix

How do you change a slave cylinder on a 1980 Ford Courier?

Loosen hydraulic line on slave cylinder (may need to use flared end wrench). Unbolt and remove fluid line. Install new part in reverse order of removing old part. Add clutch/brake fluid, and bleed system.

Where do you add brake fluid in a 1975 dodge dart?

you add the brake fluid to the master cylinder under the hood on the drivers side on the firewall.

How do you add hydraulic fluid for a 2001 convertible top could this be the reason my top goes down ok but has a very hard time to go back up?

Well I today anwsered my own question all it needed was hydraulic fluid. In the back of the convertible there should be a black rubber plug all you do is get any type of hydraulic fluid( make sure the hydraulic fluid in the back says mixs with any hdraulic fluid) you pour it in the cylinder shape in were you took out rubber plug make sure it over flows and plug it back in and your done your top should now go up way faster, smother,and nice.

Where do you add hydraulic fluid to a Ford Jubilee tractor?

The Ford Jubilee has three areas for fluid. The transmission has a filler cap near the gear shift. The hydraulic fluid has a filler cap under the edge of the seat and the differential has a filler cap behind the seat. There is a small dipstick on the right hand side to determine hydraulic fluid level.

Where do you add fluid to the clutch cylinder on a 2002 Saturn L 200 4 cylinder 5 speed?

The clutch operates off the brake fluid reservoir...Fill the brake fluid

How do you add hydraulic fluid to a Massey Ferguson 50?

thru the dipstick and vent hole by your bucket levers