Casters, Adjusting Caster Angle 38 | Sunrise Medical GTX manual

E N G L I S H

R. CASTERS

NOTE– Setting the wheelchair on a very flat table or a workbench makes this setting more accurate.

NOTE ON TORQUE SETTING– A torque setting is the optimum tightening which should be made on a par- ticular fastener. Use proper torque settings when specified.

1. Adjusting Caster Angle 38 39

Checking for Caster Squareness:

Your Quickie wheelchair leaves the factory with the casters adjusted square. Any time you change your wheelchair rear axle height, rear tire size, center of gravity position or camber tube, you should check that the casters are still square. A caster that is not square will result in the caster lifting off the floor as it rotates around the stem bolt 38 and may also lift the front of the wheelchair up and down. Check for squareness by placing your wheelchair on a flat, horizontal surface. Rotate both forks so that the casters are towards the rear of the wheelchair. Place a square or pocket level against the flat surface on the rear of the fork and note whether this surface is vertical (square) 39 . If this surface is more than 1 degree away from vertical, your casters require re-squaring.

2. Re-squaring Your Casters 40 41

Gently pry cap (A) off of both caster tubes. Locate the set screw (B) inside the right caster tube and loosen using an 8mm Allen wrench. Do not remove the set screw. Simply loosen it enough to allow the teeth on the upper and lower splines (C) to clear one another. With the stem bolt loosened, the caster fork should pivot freely. Place the wheelchair on the floor so that the two rear wheels and left caster con- tact the floor. Place some weight in the seat towards the rear to help stabilize the chair. Place a square or pocket level against the flat surface of the fork and pivot the fork until it is vertical (square) 39 . With the fork vertical, engage the teeth of the two splines to the closest mating position. Make certain that the teeth are properly engaged and not crossed. Shine a bright light behind the mating spline teeth and check for proper teeth engagement. Tighten the set screw (B) to secure the spline mating position. The set screw should be tightened to 192 in-lbs. (21.7 Nm) to ensure that it does not loosen during use.

Record the teeth engagement position of the splines on the right fork, and adjust the left fork in a similar fashion to the same position. Reassemble both casters, and re-check that they are square. Replace caps.

S. ANTI-TIP TUBES (OPTIONAL)

Quickie recommends anti-tip tubes for all wheelchairs.

Use a torque setting of 100 in.-lbs. when setting up the anti-tip tubes.

1.Inserting Anti-Tip Tubes Into Receiver 42 43

a.Press the rear anti-tip release pin (A) on the anti-tip tube so that both release pins are drawn inside.

b.Insert into the anti-tip tube receiver.

c.Turn the anti-tip tube down until release pin is positioned through the receiver mounting hole (B).

d.Insert second anti-tip tube the same way.

NOTE– If using standard or amputee axle plate, an adapter plate will be necessary to mount anti-tip receiver to axle plate 43 .

	39
	0° to 1° MAX
A	40
	B

052124 Rev. D	20