NORAC UC4.5-BC-RA2 - Manual (Page 8)

5
4 Existing System Check
The pre-install checklist is necessary to check the existing sprayer functionality and settings
before the installation.
1. Inspect boom suspension wear-pads for excessive wear and ensure the boom rotates freely.
2. Ensure the boom suspension is configured as a short-pendulum (hilly mode). Insert the
boom pin to constrain the long-pendulum suspension as shown in Figure 3.
Figure 3: Pin Location for Hilly Mode
3. Set the boom suspension to be critically damped (Figure 7). Adjust the boom springs and
dampers accordingly.
A) Unlock the boom, and push boom tip down approximately 75 cm (30 inches).
B) Hold the boom steady for a moment, and release.
C) Ensure the boom returns to its relaxed state as quickly as possible, with little to no
overshoot.
Figure 4: Boom Push Test: Critically Damped