SECTION 8—SHROUD/WHEELS
Replacing Front/Rear Caster Assemblies
NOTE: For this procedure, refer to FIGURE 8.3.
NOTE: Front and rear caster assemblies are replaced in the same manner.
Locknut
Mounting
Screw
NOTE: When replacing the front/rear caster assemblies, it is necessary to brace the caster assemblies to prevent the wheel from spinning.
1.Remove the mounting screw, two washers, and locknut that secures the caster to the fork.
2.Remove the caster and discard.
3.Secure new caster to fork with existing mounting screw, two washers and locknut (FIGURE 8.3). Securely tighten.
Adjusting Forks
NOTE: For this procedure, refer to FIGURE 8.4.
1.Remove the dust cover.
2.To properly tighten caster journal system and guard against flutter, perform the following check:
A.Tip back the wheelchair.
B.Pivot both forks and casters to top of their arc simultaneously.
C.Let casters drop to bottom of arc (wheels should swing once to one‐ side, then IMMEDIATELY rest in a straight downward position).
D.Adjust locknuts according to freedom of caster swing.
3.Test wheelchair for maneuverability.
4.Readjust locknuts if necessary, and repeat STEPS 1‐3 until correct.
Base | Tabs |
| |
Frame | Dust |
| Cover |
| Locknut |
| Washer |
Side |
|
Shroud |
|
| Caster |
| Headtube |
| Fork |
FIGURE 8.4 Adjusting Forks
5.Snap dust cover into the caster headtube ensuring that the tabs are under the plastic side shrouds.
NOTE: Components exploded for clarity. There is no need to remove the fork from the base frame.
Part No 1143153 | 55 | Pronto® M91™Base with SureStep® |