Replacing The Front/Rear Caster Assemblies; Adjusting Forks - Invacare Pronto M71 Owner's Operator And Maintenance Manual

Replacing the Front/Rear Caster Assemblies

NOTE: For this procedure, refer to
FIGURE 14.3.
NOTE: Front and rear caster assemblies are
replaced in the same manner.
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. Securely tighten.

Adjusting Forks

NOTE: For this procedure, refer to FIGURE 14.4.
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.
5. Snap dust cover into the caster headtube ensuring that the tabs are under the plastic
side shrouds.
Part No 1143240
SECTION 14—SHROUD/WHEELS
Mounting
Screw
Washer
FIGURE 14.3 Replacing the Front/Rear
Caster Assemblies
Base Frame
Fork
FIGURE 14.4 Adjusting Forks
53
Pronto® M71™Base with SureStep®
Locknut
Washer
Caster
Dust Cover
Tabs
Locknut