Kettler 7136-000-500 User Manual page 10

Assembly
Step 4
10
Install locking wheels.
The grooves of wheels should face inward.
Again, do not over torque; wheels should roll smoothly.
Push down foot lock to lock the wheels.Install non-locking
wheels on both wheelbase assemblies.
2 Required
m8x110
A
D
8 Required 2 Required
dia 16x8 m8
B
E
C