Adjusting The Wheel Locks; Adjusting The Knee Lever Wheel Locks; Adjusting The Scissor Wheel Locks - Otto Bock Ventus Instructions For Use Manual

6.4 Adjusting the wheel locks

WARNING
Failure to verify brake functionality
Accident, user falls due to incorrect adjustment and improperly inflated tyres
► Check the correct spacing between the wheel lock bolt and tyre (see the following section for details).
► Check the correct position of the wheel lock bolt relative to the tyre. During braking, the wheel lock bolt has to
cover at least half the tyre width.
► Always carry out adjustments to the wheel lock on both sides.
► Ensure that the user can operate the wheel lock without great effort. The force required to do so must not
exceed 60 N.
► Check the tyre pressure of the drive wheels. Note the information in the section "Technical data" or on the tyre
sidewall.
► Only use original drive wheels with a verified maximum radial out-of-round of 1 mm.
This adjustment must be made after the drive wheel has been repositioned or during fine adjustment.

6.4.1 Adjusting the knee lever wheel locks

INFORMATION
If the horizontal drive wheel position is changed (see Page 9) or a different drive wheel size is installed, the
481H25=PK025 knee lever wheel lock must be installed with a seat depth < 340 mm (depending on the horizontal
drive wheel position and rear seat height). For more information, see the 647G829 service manual.
The following brake types are adjusted in the same way: "standard" knee lever wheel lock, "upgrade" knee lever
wheel lock.
1) Loosen the Allen head screws in the clamp bracket on the underside of the frame (see fig. 32, item 1).
2) Adjust/move the support for the knee lever wheel lock (see fig. 32, item 2) to any position in the clamp bracket
(see fig. 32, item 3).
When the wheel lock is disengaged, the gap between the tyre and wheel lock bolt must not exceed 5 mm (see
fig. 33).
→ The distance between the wheel lock bolt and the drive wheel must be 1–5 mm in the unbraked condition.
→ It must be possible to operate the brake evenly and easily on both sides.
→ The wheel lock bolt must lock the drive wheel securely when stationary.
3) Tighten the Allen head screws to 10 Nm.
→ After adjustment, the left and right knee lever wheel locks must both have the same braking force.
32

6.4.2 Adjusting the scissor wheel locks

1) Loosen the Allen head screws in the clamp brackets (see fig. 34, item 1).
2) Adjust/move the support for the scissor wheel lock to any position in the clamp bracket (see fig. 34, item 2).
3) Install the scissor wheel lock so that the full braking force is reached and the swivelling parts can also move
freely without colliding.
→ The scissor wheel lock must not hit the frame when it is open (see fig. 34).
→ It must be possible to operate the wheel lock evenly and easily on both sides.
→ The wheel lock bolt must lock the drive wheel securely when stationary (see fig. 35).
Ventus
33
Settings
19