PDG Mobility BENTLEY Series Owner's Operation And Maintenance Manual page 34

PAGE 34
Allow the seat to be lowered to the desired posterior tilt position and release the tilt
lever. The seat should lock at desired tilt angle.
NOTE- Depending on configuration, the tilt lever may be mounted onto the left or right
side of the backrest push bar or on the left or right armrest.
WARNING – When tilting chair, attendant must hold the pushbar or back canes securely
so that seat does not drop too quickly.
14.13.2 Adjusting Seat 'Uplift' Force
This procedure may be used to increase or decrease the 'uplift' force required to raise
an occupant from a tilted position to a level seat position. Adjustment is made to the
lower end of the Gas Strut Assembly, positioning the end of the Gas Strut upward or
downward of its initial attachment point on the sub frame.
If the wheelchair occupant feels 'heavy' when attempting to restore the wheelchair to a
seat level position, the gas strut attachment should be moved down. (See Figure 14.40)
If the wheelchair occupant feels 'too light' or if the attendant has to use force to push
the Seat Assembly in to tilt when activating the tilt mechanism, the gas strut attachment
should be moved up. (See Figure 10.40)
1. Determine whether you wish to move the gas strut upward or downward (see
Figure 10.40). Determine if the desired adjustment is possible (you may have
already set the chair at maximum or minimum 'lift'.
2. Carefully remove the nut and bolt from the lower end of the gas strut. The upper
frame will rotate freely at the pivot with the bolt removed. Note that the large
spring is held in compression by a separate pin and will not extend when the bolt
is removed.
3. Re-assemble the gas strut ends to the desired hole position on the subframe.
4. Reinstall the locknuts and tighten securely.
Suggested
Position*
*Suggested strut positions are used to achieve a reasonable handle uplift force.
*If a user needs more uplift to support backrest mounted accessories or significant recline, the strut
can be moved downward.
**For occupant weight of 250-300Ibs a secondary gas spring assembly is fitted to the chair (available
from PDG)
User Weight (Ibs)
Seat Depth (inches)
Figure 14.40: Uplift adjustment
Strut Setup Location
2 1
250-300** 200-250
ALL 21-22
2 3
150-200 <150
16-20 16-20
Class 1 Medical
Rev. 2