Question #744
Operating the crane's outriggers while a load is suspended from its hook is:
Sterowanie ruchem podpór żurawia z ładunkiem zawieszonym na haku żurawia jest:
a
permitted for a minor correction of chassis inclination
dozwolone w ramach niewielkiej korekty pochylenia podwozia
b
strictly prohibited
bezwzględnie zabronione
Correct answer
c
prohibited, but only for pivoting outriggers
zabronione ale tylko dla podpór "wychylnych"
d
always permitted because the outriggers have hydraulic load-holding valves
zawsze dozwolone ponieważ podpory posiadają zamki hydrauliczne
Why?
Moving the outriggers (podpory) with a load on the hook can tilt the chassis and cause a loss of stability. The prohibition also applies to minor adjustments. Hydraulic load-holding valves (zamki hydrauliczne) hold the outriggers in position but do not make these manoeuvres safe.