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

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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.

6.4.1 Adjusting the knee lever wheel locks

This adjustment must be made after the drive wheel has been repositioned or during readjustment.
1) Loosen the Allen head screws in the clamp brackets (as with scissor wheel locks, see fig. 34).
2) Adjust the knee lever wheel lock by sliding it. 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 on the clamp brackets evenly to 12 Nm.
→ After adjustment, the left and right knee lever wheel locks must both have the same braking force.
33

6.4.2 Adjusting the scissor wheel locks

1) Loosen the Allen head screws in the clamp brackets (see fig. 34).
2) Adjust the wheel lock by sliding it. When the wheel lock is disengaged, the gap between the tyre and wheel
lock bolt must not exceed 5 mm (not illustrated).
3) Adjust 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.
→ 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.
4) In two passes, tighten the Allen head screws on the clamp brackets evenly to 12 Nm (see fig. 34).
→ After adjustment, the left and right scissor wheel locks must both have the same braking force.
18
5 mm
Zenit