Swivel Chair Replacement Parts
Bases can be divided into two types
1. "Manual" height adjustment Bases. 2."Gas Cylinder" height adjustment Bases.
Note: Under no circumstances should a Gas Cylinder be activated, tested or operated prior to completion of mechanism or base installation. Gas cylinders have been tested prior to shipping and are not returnable!
Spread out newspaper on flooring. Falling off internal parts are greasy.
Gas Cylinder height adjustment bases.
First turn the chair up-side-down so the clip and washer in the center of the base bottom underside can be seen. With a screw driver or needle nose pliers, remove the holding clip and small thin washer from the piston rod. Slowly withdraw the base while pulling and turning. The base will remove from the gas cylinder most likely pulling with it (hidden inside) the 2 washers and ball bearing. Set these parts aside to be reinstalled with the replacement base. There should be 4 small parts. If not, look inside the withdrawn column for the remaining. Usually you will find a washer.
To install a base, be sure to first replace (4 parts) the rubber cushion onto the piston rod and push it up as far as it will go, then the a large washer, then (lightly greased) bearing and then the second washer onto the piston rod. A light wipe of Vaseline is also recommended to be applied to the gas cylinder body too. Then slip the base with hub column
*(also see *Column below) onto the gas cylinder. The small washer and clip
are then lastly installed onto the protruding rod at the outside bottom
of the hub column.
We highly recommend replacing the 6 loose pieces which make up the low cost "bearing kit". A detailed schematic is included with each kit purchased to help with installation. Order the bearing kit along with your order as by itself it does not meet our $20.00 minimum merchandise purchase.
Manual height adjustment mechanism bases.
To remove the base, first remove the single screw located on the Bell. Place the chair with the bell screw removed in it's normal
upright position. Grasp the chair from behind the back and "jerk"
it upwards once or twice to separate the chair with mechanism from the base.
In some instances it may require both pulling and twisting which is best
done by tipping the chair over. When separated, inspect the Hub Liner to insure
it is not worn. A worn hub liner will be rough on the inside walls, cracked
or broken. This will cause wobbling. If it looks or feels like it has threads,
it is worn! Hub liners do NOT have threads.
Installation of a manual post base is just as easy. Place the chair up-side-down
so that the threaded mechanism
Post containing the bell with thrust washer are
somewhat pointing upwards. Then simply place the base on the threaded post
and slide/push the base up to the bell, and snug tighten the Philips bell
screw to complete the installation. Lubrication of the threaded post is
not necessary.
*Column--The Column does not require any special installation into the Base. Simply inserting the Column into the tapered center base hole is adequate as the weight of the chair and normal sitting will seat the Column taper tightly after only a single use or two. Most or many manual height adjustment chairs do not have removable columns.
The end.
