Swivel Chair Replacement Parts
Manual mechanism
Most mechanism existing wood screw holes may not fit replacement mechanism holing. See Mechanism-Position and Pivot point locating.
The mechanism Pivot (point) Pin, shown on the #01 475 page, determines the proper balance of any chair. Virtually every chair manufacturer has determined a different pivot pin and mechanism placement depending upon which mechanism was used and the weight of the chair back.
The replacement mechanism pivot pin location should be in the same general area of the original, that is, assuming that the original was comfortable for you. See Retrofitting.
After installation is completed, caution should be exercised when first "trying or testing the chair". Incorrect installation may "dump" occupant onto floor and cause bodily injury. Proceed SLOWLY to test, holding firmly on to a solid object to prevent any harm in case of sudden movement.
Your replacement mechanism pivot pin placement is common to many but not all Office swivel chairs. You may find after installation and testing, that your chair is too easy or too difficult to tilt back properly. The "fix" is not difficult.
Before starting, insure that the mechanism has not been installed backwards. The "hand wheel" (handle or knob) on the mechanism's should face the front of the chair, making it convenient to adjust the spring tension while sitting upright in the chair.
Then for manual mechanisms, adjust the chair to a normal comfortable height by turning the Bell either clockwise or counter clockwise. This is easiest accomplished when the chair is lying on it's back. A normal position while sitting upright is when the thighs are parallel to the floor and feet are flat on the floor although some people prefer an inch or two higher.
Gas mechanism
Gas cylinder mechanisms after installing can be adjusted for height by activating the height adjustment handle. Thighs should be parallel to the floor after height adjustment or if prefered an inch or two higher.
Manual and Gas problem solving:
Problem: Chair "falls" back too easily: The Pivot Pin has been placed too far "forward". Remove the mechanism and re-mount further rearward. Usually only 1"-2" of movement is necessary. Also, see if the spring tension adjustment wheel is mid-range.
Problem: Too much "push" is required to tilt back comfortably: The Pivot Pin is too far "rearward". Remove the mechanism and re-mount further forward. Usually only 1"-2" of movement is necessary. Also, see if the spring tension adjustment wheel is mid-range.
