11-7
Twist Owner’s Manual
OM_TWIST_0811RevA
CHAPTER 11: CASTERS AND FORKS
8. Securely tighten the center screw.
9. Securely tighten the outer screw.
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.
11. Recheck the forks to be certain they are still perpendicular to the level surface before riding.
Figure 11-10
Replacing Frog Legs® Fork
Tab Slots
Caster
Mount
Caster
Housing
Caster Cap
Fork Stem
Fork
Washer
Allen
Screw
C Spring Washer
Axle
Spacer
Spacer
Allen Screw
Washer
C Spring Washer
Allen
Screw 1
Washers
Allen
Screw 2
Caster
End Cap
ANGLE ADJUSTABLE SPEEDLOADER CASTER MOUNT
Adjusting the Angle
Tools Needed:
• 1/8” Allen Wrench
• 3/16” Allen Wrench
• Drafting Angle or
• Bubble Level Bracket
1. Place the chair on a level surface.
2. Using the 1/8” Allen Wrench, remove Allen screw 1 (outer screw) and the washer. See Figures 11-11 to 11-13.
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 11-14, 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 11-15. A Bubble Level Bracket can also be used with the standard fork and the
mono fork.
Summary of Contents for Twist
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