V-Trak Backrest, User Manual

Page: 11 / 32

Installing the Central Mounting Assembly (CMA)
Your combined Central Mounting Assembly (CMA) is supplied configured for its most likely
application. If the Mounting Blocks have been installed as illustrated, on a wheelchair with
regular widths of: 26cm (13”), 38cm (15”), 43cm (17”) or 50cm (20”),
The assembly can be installed as supplied with minor adjustments to the Mounting Block angle. If
the wheelchair widths are different from these sizes, or you need to install the Mounting Blocks
differently, you will need to retract or extend the arms to suit
Also, once the backrest is installed, the positioning of the backrest may require further
adjustment of the arm positions.
Mounting blocks:
Refer to pages 7-9 or the separate instructions supplied with the Mounting Blocks.
Ensure that once in their provisional position the Mounting Blocks can be moved easily for
adjustment prior to final positioning.
Figure 13 - Central Mounting Assembly (CMA)
\
Installation instructions-Mounting and adjustment hardware
1.
Remove the Mounting Blocks from their packing and dismantle
2. Install one Mounting Block at the optimum height for the backrest. Ensure that the screw
holes are to the outside of the wheelchair and accessible for final positioning. Do not over-
tighten at this stage. Allow the Mounting Block to rotate under moderate pressure.
3. Install the second Mounting Block on the opposite side approximately 50mm lower than the
first block.
4. Align the Central Mounting Assembly and insert one Locking Pin into the first Mounting block.
5. Align the second Locking Pin with the opposite Mounting Block.
6. Close the first Locking Lever so that the assembly is fixed firmly.
7. Slide the second (lower) Mounting Block up until the second Locking Pin is fully engaged.
Alternatively, slacken the screws on the first Mounting Block then lower the combined
mechanism and Mounting Block to mate with the second block to achieve the same result.
8. Close the second Locking lever.
9. Check that the mechanism can be removed and replaced easily when both Locking Levers are
opened. If it does not do so easily and smoothly, the Mounting Blocks may not be level or the
Locking Pins may not be perfectly aligned. Continue adjustments until removal and
replacement is smooth and easy.
10. Tighten all screws but allow for further positioning after installing the backrest.
Locking Pin
Locking Lever
Mounting Block
Locking Lever