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SERVICE MANUAL
A very important aspect of any wheelchair is its directionality.
To check if the wheelchair goes straight, sit on it, push it and let it go until it stops.
If something is wrong, the slower the wheelchairs moves forward (momentum close to nothing), the more likely it turns right or left. There-
fore, if no or irrelevant turn occurs, the wheelchair is properly adjusted.
Cause
Reason
SURFACE
The surface where the test is being performed is not even
REAR WHEELS
The rear wheel are not equally inflated
The tyres of the two rear wheel are different or differently
The rear wheels are not adjusted at the same height
The camber of right and left wheels are different or differ-
ently adjusted
The wheel, when turning, touches the side guard or the
brakes
The wheels doe not turn smoothly
FRONT WHEELS
The casters are not adjusted at the same height
The tyres of the two front wheels are different or differently
The fixing bolts of the fork/fork support/clamp are loosened
The caster does not turn smoothly
Either or both forks are not adjusted so as their axis is per-
pendicular to the ground.
FOOTPLATE
The footplate tubes are adjusted at different height.
If the wheelchairs does not go straight, in most cases the reason
is the fork angle adjustment.
However, before working on the fork angle adjustment, check all
the points above mentioned.
First, make the test along a flat even surface to check the direc-
tionality.
1
The correct adjustment has both forks perpendicular to the
ground, that is, their axis at 90°.
2
If the wheelchair TURN RIGHT, the cause is one or more of
the following:
The RIGHT fork is tilted inwardly and/or backward
The LEFT fork is tilted outwardly and/or frontward
3
If the wheelchair TURN LEFTT, the cause is one or more of
the following:
The LEFT fork is tilted inwardly and/or backward
The RIGHT fork is tilted outwardly and/or frontward
REHATEAM s.r.l.—vicolo Negrelli 5—31040 Castagnole di Paese TV - www.rehateamprogeo.com
DIRECTIONALITY
Solution
Test the chair on even and flat surface
Inflate both tyres at the same pressure
Change the tyres
Adjust the rear wheel height
Adjust the camber.
Fix or replace the side guard. Add spacer on the
receiver. Adjust the brake.
Clean or change the bearings
Adjust the front wheels at the same height
Change the wheels
Check and tighten all fixing bolts
Clean the bearings.
Adjust the fork axis inclination.
Adjust the tubes at the same height
1
90°
90°
2
3
Follows next page
90°
90°
Service Manual DUKE 6
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