2. Raise pantograph pneumatically and hold it by hand just over resting position.
3. Fix pantograph with belt between base frame and upper frame.
4. UNLOCK Test Valve:
a. Detach nut (1).
b. Detach lever (2) and turn it 180° degrees.
c. Attach lever (2) to the valve unit ADD and fix it with the nut (1).
Illustration 23: UNLOCK test valve
5. OPEN Test Valve:
a. Bring lever (2) to position OPEN:
Air is blowing – off.
The quick exhaust valve exhausts.