Replacement And Adjustment Of Shock Absorbers - Permobil Chairman 2k Service Manual

Replacement and adjustment
of shock absorbers
Removal
1. Run the seat up to its highest position. See page 7
for instructions to manually raise the seat.
2. Switch off the main power switch.
3. Detach the front fender on the side on which the
shock absorber is to be replaced, see page 8.
4. Jack up the chair so that the wheel is free on the
side concerned.
5. Unscrew and remove the screw on the shock
absorber's upper fastener, see fig. 14:1.
6. Unscrew and remove the screw on the shock
absorber's lower fastener, see fig. 14:2.
Adjustment of the shock absorber
Before the new shock absorber is mounted, it must be
adjusted to the proper value.
Return damping valve
To get standard setting, screw the return damping valve
fully clockwise by hand. Then screw the valve fully
counterclockwise, counting the "clicks". Then screw the
valve halfway clockwise i.e. halve the number of "clicks".
Screw the valve clockwise (open the valve) for
softer damping, or counterclockwise (close the valve) to
have harder damping.
The spring force
The spring force can be set to suit different passenger
weights using the adjustment nut. Increase the
dimension for a harder suspension, decrease the
dimension for a softer suspension.
NB! Make sure the stop spring is in the right position,
see fig. 15.
Fitting
Mounting is performed in reverse order.
Fig. 15. The shock absorber is adjusted using the return damping valve and the adjustment nut.
Return damping valve
Adjustment nut
11
1
Fig. 14. The shock absorber is mounted
with two screws.
Passenger weights
- 110 Ib.
110 - 155 Ib.
155 - 200 Ib.
200 - 264 Ib.
Setting
Shock absorber
2
Setting
0 - 3/32 inch
3/32 - 5/32 inch
5/32 - 1/4 inch
1/4 - 3/8 inch
Stop spring