How-to & FAQs

How-To Instructions

Click on the images below for more information.

FAQ: Check Ball Valve Seats Check Ball Valve Seat Click to enlarge HOW TO: Saddle Stem Verify Measuring a saddle Click to enlarge
HOW TO: Torsion Spring Install Installing a torsion seat Click to enlarge HOW TO: Measure for Check Balls measure for Check Balls Click to enlarge
HOW TO: Measure a Wheel How to measure a wheel Click to enlarge HOW TO: Measure a Caster How to measure a caster Click to enlarge
HOW TO: Fill Your Jack With Fluid How to measure a wheel Click to enlarge HOW TO: Rebuild An Import Jack (Japan/Taiwan/China) How to measure a wheel Click to enlarge

How-To: Install a Leather Piston Cup

While possibly the best seal in use, Leather Piston Seals can be difficult to install unless you follow these directions. First, soak the seals in hydraulic fluid for 24-48 hours to soften the seal; particularly the flared lip. The flare angle needs to be slightly straightened to allow the seal to be pushed into the cylinder.

After the seal has been sufficiently softened by soaking, install it on the end of the ram with the flare pointing away from the ram. Next, place a towel/rag on a work bench and soak a six inch circle in the center with hydraulic fluid. This will become your work area for “working” the flare of the seal and reducing the angle. With the ram at approximately a 45 degree angle, repeatedly roll the seal through the fluid, exerting pressure on the flare, until the flare reduces to nearly a 90 degree shape. The seal must be deformed enough for it to slip into the cylinder without damaging the leading edge lip – where the actual sealing will occur on the cylinder wall.

After successfully inserting the new seal and ram into the bore, reassemble the jack and put it under load. The jack should rest under load for 4-6 hours to allow the pressure to force the seal angle flare to return to normal against the cylinder wall. Once the flare is restored, enjoy your working jack for years to come.

How-To: Bleed a Jack

Another popular question we receive is - How do I bleed my jack? Well, jacks are NOT quite like the hydraulic brake system of your car. You don't have several feet of small diameter steel tubing carrying ounces of oil all over the place, so, you don't really need to bleed them as part of routine care.

If your jack is acting 'spongey' the major reason generally is that you have a BAD SEAL that is sucking air into the system or else your kids (or some bugwit neighbor) played around with it and tried jacking it upside down. Whatever the reason - Here we go:

Jack the jack all the way up/out. Release the release and retract all the way down. Open the filler plug and you should get a little psssst. Voilá! That's IT! But MAKE SURE you open the filler plug and NOT a CHECK VALVE - This will introduce air INTO your system!

Also you may lose the prime of your jack. - Set the release valve closed and PULL THE PISTON OUT or UP, open release valve and push back down. This should force oil through the system and catch the prime again - You may have to do it a couple of times.