Replacing Casters; Replacing Forks - Invacare Pronto R2 Series Servise Manual

PROCEDURE 9
7. Examine the head of the hex screw and the locking tab
washer. Make sure one (1) of the tabs on the locking
tab washer is parallel with one (1) of the flats on the
head of the hex screw.
8. If one (1) of the tabs on the locking tab washer is NOT
parallel with one (1) of the flats on the head of the hex
W
screw (FIGURE 1), TIGHTEN the hex screw until the
H
closest flat and locking tab are parallel.
E
NOTE: Tighten hex screw only. DO NOT loosen hex screw
to make one of the tabs on the locking washer parallel.
E
9. Bend the parallel tab of locking tab washer up tight
L
against flat of the hex screw (FIGURE 1).
S
10. Reinstall the drive wheel onto the wheel hub. Refer to
REMOVING/INSTALLING DRIVE WHEELS in this pro-
cedure of the manual.
11. Repeat procedure for the opposite side of the wheel-
chair, if necessary.
Locking
Washer
Mounting
Screw
Mounting Screw (Apply Loctite 242 and use a
Torque Wrench only to Torque to 90-inch pounds)
TIGHTEN Hex Screw if Locking Tab is not
Parallel with Flat on Head (STEP 9)
Flat on Head
of Hex Screw
Bend Tab up tight against Flat on
FIGURE 3 - REMOVING/INSTALLING DRIVE
Keystock
Keyway
Washer
Locking Tab Parallel
with Flat on Head of
Hex Screw (STEP 9)
Locking
Tab
Head of Hex Screw (STEP 10)
WHEEL HUB
REPLACING CASTERS (FIGURE 4)
1. Remove the hex screw, washers and locknut that
secure the caster to the fork.
2. Remove the caster from the fork.
3. Install Loctite 242 onto the hex screw.
4. Replace caster and reverse STEPS 1-3.
5. Torque the locknut to 120-inch pounds.
6. Loosen the locknut 1/8 of a turn.
7. Move the caster side to side.
NOTE: If the caster moves side to side, tighten the
locknut slightly. Repeat STEP 7 until there is no side
to side movement of the caster.
Hex Screw
Drive
Shaft
Washer
FIGURE 4 - REPLACING CASTERS
REPLACING FORKS (FIGURE 5)
1. Remove the hex screw, washers and locknut that
secure the caster to the existing fork.
2. Remove the caster from the existing fork.
3. Remove the dust cover.
4. Remove the locknut and nylon washer.
5. Drop the existing fork out of the caster head tube.
6. Slide the new fork into the caster head tube.
NOTE: Check bearing assemblies and replace if nec-
essary.
7. Ensure that new fork slides completely into the
caster head tube.
8. Install nylon washer and secure with locknut.
Improper positioning of the washer will
prohibit the free movement of the forks.
9. Install Loctite 242 onto the hex screw.
30
Fork
Caster
WARNING
WHEELS
Locknut
Washer