
11-7
ZRA_Aero Z Owner’s Manual
OM_ZRA_Aero Z_0913RevA
CHAPTER 11: CASTERS And FORKS
3. Using the 3/16” Allen wrench, loosen but do not remove Allen Screw 2 (center screw) enough to allow the end cap
tabs to slide out of the tab slots.
4. Using a drafting triangle or similar 90° angle tool as shown in Figure 11-12, rotate the fork until the flat edge of the
fork is perpendicular to the level surface.
Note:
If your chair is equipped with Frog Legs®, you must square the barrel of the Frog Legs® to the level
surface using a Bubble Level Bracket because the flat edge of the Frog Legs® fork is not parallel to the caster
mount assembly. See Figure 11-13. A Bubble Level Bracket can also be used with the standard fork and the
single-sided fork.
5. While holding the fork in place, and with the end cap tabs engaged in the tab slots, check to see if one of the
six perimeter holes in the caster end cap aligns with one of the three threaded holes in the caster mount. If so,
proceed to Step 7. If not, proceed to Step 6.
6. Pull the caster end cap away from the caster housing and rotate the caster end cap one-sixth turn and re-engage
the caster end cap tabs in the tab slots. Again, check to see if one of the six perimeter holes in the caster end cap
aligns with one of the three threaded holes in the caster mount. If so, proceed to Step 7. If not, repeat this Step 6
using the next combination of caster end cap tabs and tab slots.
7. Thread Allen Screw 1 through the two aligned parts and loosely tighten.
Note:
There are six perimeter holes in the caster end cap and three threaded holes in the caster mount. These
are designed to permit 17° of adjustment in 1° increments.
8. Securely tighten the center screw.
9. Securely tighten the outer screw to a torque setting of 60 inch/lbs.
10. Repeat Steps 2 through 9 for the opposite caster.
Note:
The caster end caps on each side of the chair are mirror images. One is marked with an “R” and one with
an “L”. Once one side is squared, simply adjust the other side to be the mirror image, and it too will be square.
Note:
If you are not able to square your casters and have changed the configuration of your chair, you may need
to reverse the right and left caster end caps to achieve the desired angle.
11. Recheck the forks to be certain they are still perpendicular to the level surface before riding.
Figure 11-9
Adjusting the Angle (Bearing Fork)
Figure 11-10
Adjusting the Angle (Slipstream Single-Sided Fork)
Tab Slots
Tab Slots
Caster
Mount
Caster
Mount
Caster
Housing
Caster
Housing
Fork Stem
Fork Stem
Washer
Nylock Nut
Nylock Nut
Caster
End Cap
Caster
End Cap
Allen
Screw 2
Allen
Screw 2
Allen
Screw 1
Allen
Screw 1
Lock
Washers
Lock
Washers
Washer
Caster Cap
Caster Cap
Содержание AERO Z
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