Wheel Lock Adjustment/Replacement; Replacing/Adjusting Casters - Invacare A4 Owner's Manual

SECTION 6—WHEELS

Wheel Lock Adjustment/Replacement

NOTE: For this procedure, refer to FIGURE 6.7 on page 40.
NOTE: Invacare recommends under mount wheels locks when engaging in any contact sport.
NOTE: Before adjusting or replacing the High/Under mount wheel locks, ensure that the tires are inflated to the recommended psi on
the sidewall of the tire.
1. Loosen the hex screw(s) that secure the High/Under mount wheel locks to the seat frame.
2. Perform one of the following:
A. Replacing the High/Under Mount Wheel Lock:
i. Remove the hex screws and remove the existing wheel lock from the wheelchair.
ii. Install the NEW wheel lock.
B. Adjusting the High/Under Mount Wheel Lock ‐ Proceed to STEP 3.
3. Adjust position of wheel lock until the 3/16‐inch engagement with the tire is obtained.
NOTE: Any wheel lock adjustment should embed the wheel lock shoe at least 3/16‐inch into the pneumatic tire when engaged.
4. Engage the wheel locks and push against the wheelchair and determine if wheel locks engage the rear wheels enough
to hold the wheelchair.
5. Repeat the STEPS 3‐4 until the wheel locks hold the wheelchair.
Hideaway Undermount Wheel Lock
FRONT
Wheel Lock Shoe

Replacing/Adjusting Casters

NOTE: For this procedure, refer to FIGURE 6.8.
NOTE: Both casters should be the same size.
NOTE: Non‐suspension casters cannot be adjusted as they mount in one position only.
1. Remove the bolt and locknut that secure the front caster to the fork.
2. Remove front caster and axle spacers from fork.
3. Perform one of the following:
A. Short Fork ‐ Install the NEW caster, bolt, locknut and axle spacers onto the fork and securely tighten.
B. Long Fork ‐ Perform the following steps:
i. Determine the desired mounting hole for the caster installation. Refer to DETAIL ʺAʺ.
ii. Line up the front caster and two spacers with the mounting hole in the fork determined in STEP B‐1.
A4 Owner's Manual
Wheelchair Frame
REAR
Hex Screw
3
/ inch
16
Undermount
Wheel Lock Shoe
Tire
FIGURE 6.7 Wheel Lock Adjustment/Replacement
3
40
Hex Screws
HIgh Mount Wheel Lock
/ inch
16
High Mount Wheel Lock Shoe
Tire
Part No 1110545