4-2
Z Series Owners Manual
OM_Z_1212RevC
CHAPTER 4: BACKRESTS And PUSH HAndLES
Adjusting the Backrest Lock Bracket
(Aero Z Series 1, ZR Series 1, ZRA Series 1)
Tools Needed:
• 3/16” Allen Wrench
• 1/2” Open End Wrench
If the backrest will not lock in the unfolded (upright) position,
follow these procedures:
1. Fold the backrest down over the seat.
2. Place the 1/2” Open End Wrench on the locknut on the
inner side of the seat rail, which holds the latch screw in
place. Using the 3/16” Allen wrench, loosen, but do not
remove, the latch screw. See Figure 4-3.
3. Rotate the latch spacer.
4. Securely tighten the latch screw.
5. If the backrest still will not lock securely in the unfolded
position, repeat the procedure on the opposite side of
the chair.
Note: Do not over tighten the latch screw or you may
damage the latch spacer.
Adjusting if there is “play” in the Backrest or Backrest Bracket
(Aero Z Series 1, ZR Series 1, ZRA Series 1)
Tools Needed:
• 7/16” Open End Wrench
• 5/32” Allen Wrench
If the backrest or backrest bracket becomes loose or there
is “play” in the folding backrest assembly, follow these
procedures:
1. On each side of the chair, tighten both Allen screws
and the pivot screw shown in Figure 4-4.
2. Repeat this procedure until there is no “play” in the
folding backrest assembly.
3. Do not over tighten the pivot screw or the backrest will
not fold/unfold.
Note: If the above procedure does not completely eliminate the “play” in the backrest, tighten the latch screw. Do not
overtighten the latch screw or you may damage the latch spacer. See Figure 4-3.
Adjusting the Back Mount
(Aero Z Series 2, ZR Series 2, ZRA Series 2)
Tools Needed:
• Two 7/16” Open End Wrenches
If your backrest is difficult to fold and unfold or is too loose, follow these procedures:
1. Using an Open End wrench, hold the pivot bolt in place and slightly loosen or tighten the nylock nut with the
second Open End wrench. See Figure 4-5.
2. Repeat the procedure on each side of the chair until the desired tightness is achieved.
Figure 4-4
Adjusting the Backrest Bracket
Backrest
Pivot Screw
Allen Screw
s
Latch
Screw
Figure 4-3
Adjusting the Backrest Lock Bracket
Latch
Spacer
Latch
Screw
Содержание AERO Z
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