Procedure 5 - Casters; Removing/Installing Front Casters; Replacing Forks - Invacare ORBIT Owner's Operator And Maintenance Manual

CASTERS
This Procedure Includes the Following:

Removing/Installing Front Casters

Replacing Forks

WARNING
After ANY adjustments, repair or service and BE-
FORE use, make sure all attaching hardware is
tightened securely.
DO NOT use your power wheelchair unless it has
the proper tire pressure (p.s.i.). DO NOT over-inflate
the tires. Failure to follow these suggestions may
cause the tire to explode and cause bodily harm.
The recommended tire pressure is listed on the side
wall of the tire.
CAUTION
DO NOT overtighten hardware attaching to the
frame. Damage to components may occur.
REMOVING/INSTALLING FRONT
CASTERS (FIGURE 1)
NOTE: This procedure replaces FRONT TIRES - PNEU-
MATIC/SEMI-PNEUMATIC on page 38 in the Power Ti-
ger Owner’s Manual, part number 1045938.
Periodically, the tires will need to be replaced due to wear or
puncture.
Removing
1. Remove the mounting screw, spacers and locknut that
secure the EXISTING caster to the fork.
2. Remove the EXISTING caster from the fork.
Installing
1. Position the new/existing caster into the fork.
2. Reinstall the mounting screw, spacers and locknut.
Securely tighten.
Fork
Mounting
Screw
Spacer
FIGURE 1 - REMOVING/INSTALLING FRONT
CASTERS
3. Torque locknut to 10-foot pounds (120-inch) pounds.
4. Loosen the locknut 1/8 of a turn.
5. Move the caster side to side.
NOTE: If the caster moves side to side, tighten the locknut
slightly. Repeat STEP 4 until there is no side to side move-
ment of the caster.
REPLACING FORKS (FIGURE 2)
NOTE: This procedure combined with REMOVING/IN-
STALLING FRONT CASTERS replaces SIX OR EIGHT
INCH CASTER INSTALLATION on page 36 in the Power
Tiger Owner’s Manual, part number 1045938.
1. Remove the caster from the existing fork. Refer to
REMOVING/INSTALLING FRONT CASTERS in this
procedure of the manual.
2. Remove the head tube cap.
3. Remove the locknut and nylon washer.
4. Drop the EXISTING fork out of the caster head tube.
5. Slide the new fork into the caster head tube.
NOTE: Check bearing assemblies. Replace if necessary.
6. Ensure NEW fork slides completely into caster
headtube.
7. Install nylon washer and secure with locknut.
Improper positioning of the washer will prohibit the
free movement of the forks which may result in
injury to the occupant.
8. Install the caster onto the NEW fork. Refer to RE-
MOVING/INSTALLING CASTERS in this procedure
of the manual.
9. Install headtube cap.
Locknut
Spacer
Caster
FIGURE 2 - REPLACING FORKS
17
PROCEDURE 5
WARNING
Headtube
Cap
Locknut
Nylon Washer
Caster Headtube
Fork
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