Service Manual iFLEX5
© Hirschmann Rev. I 0522/17 190154_I.DOC
14.7 BOOM OUT OF SEQUENCE:
Digital Output 14 boom out of sequence is lamp, located on the front crane console, is
activated when the sections become greater than 3.5% out of sequence. Refer to sequence
charts in the manufacturers’ load capacity charts. Another indication for out of sequence are
the flashing section percentages located at the bottom of the console display.
14.8 TELE ROD DRAIN VALVE:
The tele rod drain valve is a normally closed valve that when energized opens to allow oil in the rod
side of the tele cylinders a path to tank. The valve is de-energized to prevent flow to tank. The Boom
Control System energizes this valve at all times unless the boom is fully retracted, or the retract
pressure switch is activated. See the logic chart below. Digital Output 13 is on unless:
14.9 TELE TWO STAGE RELIEF VALVE:
The two stage tele relief valve is a normally closed valve that when energized increases the tele
extend relief pressure from 2500 psi to 3000 psi. The Boom Control System energizes this valve
when the retract pressure switch is activated, or when the OM/Fly section is greater than 4% while
extending. See the logic chart below.
Tele Two Stage Relief
Solenoid (DO15)
Retract pressure
sw. (DI 18)
Extend pressure
sw. (DI 19)
boom section
percentage
display
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