
14
Permobil TiLite CR1 Service Manual
Performance
The following items below should be checked regularly to ensure maximum performance.
Rear Tire Inflation
It is very important to maintain proper tire inflation for best performance and tire life. Air pressure in the tire drops gradually over time and use. Permobil
recommends checking the tire pressure every 2-3 weeks at minimum and filling to the maximum pressure listed on the sidewall of the tire. If the air pressure has
dropped, refill to the listed maximum pressure to maintain performance.
Rear Wheel Alignment
When making an adjustment to the Center of Gravity on the wheelchair it is also necessary to adjust the rear wheel toe angle. This is done by rotating the camber
tube within the vertical strut assembly. A rear wheel can also be removed to check that the flat section of the camber tube end plug is perpendicular to the ground.
Center of Gravity Position
RESNA has found that the positioning of the rear axle is critical to getting the best performance out of a manual wheelchair. Ideally, the rear axle is positioned to
distribute the weight as close to optimal as the user feels comfortable. Optimal weight distribution is considered to be when about 80% of the weight is carried
by the rear wheels and about 20% of the weight is carried by the front casters. Weight balance is shifted onto the rear axle by moving the camber tube forward
relative to the rest of the frame.
Troubleshooting
Please reference relevant product owner manuals or a knowledgeable equipment provider for any issues related to accessories not supplied by Permobil TiLite.
Floating Casters
Tools needed:
1. 4mm Hex Wrench
2. Rubber Mallet
3. Ruler or Measuring Tape
4. Smooth, level surface
1. Place the wheelchair on a smooth, level surface with the casters trailing rearward.
2. Before making any adjustments to the wheelchair, it is important to check the following:
a. The tires are properly inflated to the PSI rating shown on the sidewall of the tire.
b. The camber tube is properly centered on the frame side to side and the camber tube is straight relative
to the rear of the frame. For adjustments see "Replacing Parts on the TiLite CR1, Camber Tube" section.
c. The toe-in / toe-out is correctly set up (See "Adjusting Toe-in / Toe-out" section).
All items in this list are performed at the factory to ensure proper frame alignment before shipping.
If an adjustment still needs to be made, complete it before proceeding. If no adjustment is needed,
proceed to Step 3.
3. Loosen, but do not remove, the clamp bolt in the footrest clamp only on the side of the floating
caster. Once the bolt is loose three full turns, strike the clamp bolt with a mallet upward to release
the internal wedge in the footrest clamp.
4. Loosen, but do not remove, both bottom clamp bolts in the camber tube clamp on the side
opposite the floating caster. Do not loosen the two bottom clamp bolts too much as to allow
the camber tube to slide within the camber tube bracket.
5. Wiggle the wheelchair and let it settle on to the smooth, level surface to release any bind that
may have existed within the wheelchair assembly.
6. Make sure the footrest is set to the desired seat-to-footrest measurement and, using a ruler
or measuring tape, make sure the left and right sides of the footrest are the same distance
from the level surface. It is important to have both sides of the footrest level and the
footrest clamp bolt tightened before the bottom clamps and camber tube are tightened down.
7. Torque the clamp bolts to 10Nm / 7.4 ft lb.
8. Tighten the bottom clamp bolts starting with the bolt nearest the front of the wheelchair and
working backward. Progressively torque screws in 2Nm / 1.5 ft lb increments, switching
between screws until torque listed at the bottom of the page on "Replacing Center of Gravity
Frame Clamp" pertaining to type of clamp on the wheelchair is achieved. If clamp gaps are
significantly different, loosen screw on smaller clamp gap side by at least one turn, re-torque
opposite bolt to specified value, then re-torque loosened bolt to specified value. It is acceptable
to exceed specified torque value by 2Nm / 1.5 ft lb to achieve better equivalence in clamp gaps
or until clamp gaps are nearly equal.
9. If the above adjustments correct the floater and all four wheels are flat on the level surface, the adjustment is finished.
If a caster is still floating, repeat Steps 3 through 8. If you continue to have a floater that cannot be corrected using these
steps, please contact TiLite Customer Support.
Footrest
Clamp Bolt
Camber Tube Bracket
Frame Clamp
Strut Bracket
Strut Clamp Screw
Strut Clamp
Strut
Strut Spacer
Bottom Clamp Screws
Strut Clamp Nut
Frame Clamp
Screws
Camber Tube