Section 4 Operation
4-6
Tightening of Friction Lock
Occasionally the headrest may need to be tightened. The headrest mechanism relies on friction to maintain a secure
position. To tighten this adjustment, refer to Figure 4-4 and proceed as follows:
1. Unlock the headrest and move it to the extreme upward and forward position. Leave the headrest unlocked.
2.
Loosen the Set Screw a couple of turns, with a 3/16 Hex Wrench.
3. Using a 3/8” hex wrench tighten the adjustment nut until it stops. Unlock the handle and turn the
adjustment nut 1/8 of a turn and re-lock the handle. If headrest is not at the desired tension, repeat the process by
unlocking the handle and adjusting another 1/8 turn.
4. If the handle is too hard to lock into place, loosen the nut and try the handle again.
5.
When the adjustment is correct use one hand on the back of the chair grab the upper link and pull the headrest
backward towards you. If the headrest does not move then the adjustment nut is secure.
6. Re-tighten the set screw using a 3/16” hex wrench.
Figure 4-4 Tightening the Friction Lock
Upper Link
Headrest Handle
Head Rest
Handle in locked
position
Handle in un-locked
position
Adjustment
Nut
Set Screw
CAUTION
!
Do not over tighten the adjustment nut or the pins in the upper link will break.
NOTE
!
This is a user adjustment and as such is not covered by the warranty
.
