Adjusting The Brakes; Adjusting The Wheel Locks - Otto Bock Ventus Instructions For Use Manual

5) Install the caster wheel.
6) Slide on the 2nd spacer bush (not pictured).
7) Tighten the threaded axle to 8 Nm.
→ Once changed, the left and right caster wheels must have the same vertical position in the caster fork.
→ Once the anterior seat height has been adjusted, the rear wheel tracking (see Page 15) and the caster journal
angle (see Page 17) must be checked and adjusted if required.
31

6.4 Adjusting the brakes

CAUTION
Failure to verify brake functionality
Accident, falling of the user due to incorrect adjustment and improperly inflated tyres
► Verify the correct setting of the wheel lock (especially the distance between the wheel lock bolt and tyre).
► Ensure that the user can operate the wheel lock without great effort. The force required is not permitted to
exceed 60 N (~ 6 kg).
► Check the tyre pressure of the rear wheels. Note the information in the section "Technical data" or on the tyre
sidewall.
► Only use original rear wheels with a verified maximum radial out-of-round of 1 mm.

6.4.1 Adjusting the wheel locks

INFORMATION
If the horizontal rear wheel position is changed (see Page 10) or a different rear wheel size is installed, the
481H25=PK025 knee lever wheel lock must be installed with a seat depth of < 340 mm (depending on the hori­
zontal rear wheel position and rear seat height). For more information, see the 647G829 service manual.
This adjustment must be made after the rear wheel has been repositioned or during fine adjustment.
The following brake types are adjusted in the same way: "standard" knee lever wheel lock, "upgrade" knee lever
wheel lock, scissor 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).
INFORMATION: For special requirements when adjusting the scissor wheel lock, see the section
"Special requirements for adjustments to the scissor wheel lock".
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.
Ventus
Settings
Ottobock | 19