OPERATING CONTROLS AND PROCEDURES OPERATOR MANUAL 600E2
3-8 PUBLISHED 04-26-2019 CONTROL # 113-09
are extended to a point in which they provide maximum
stability.
The OMS utilizes an LED indicator to communicate to the
operator the position of the outriggers and stabilizers. The
Outrigger Status Indicator is a bi-color LED located at each
control station. When power is on and the outrigger and
stabilizer beams are extended to a point at which they
provide maximum stability (stabilizers beams shall be fully
extended on cranes equipped with Rear Stabilizer Out and
Down (RSOD)), the Outrigger Status Indicator illuminates
constant green, indicating a lift can be made. If power is on
and one or more outrigger or stabilizer beams are not
extended to a position which provides maximum stability, the
Outrigger Status Indicator flashes red, indicating a lift should
not be made. If the Outrigger Status Indicator illuminates
constant red, there is a fault in the OMS.
HYDRAULIC CAPACITY ALERT SYSTEM
System Description
The Hydraulic Capacity Alert System (HCA) is a hydraulically
operated, maximum capacity sensing device that will stop all
of the normal crane functions that cause overload when
maximum capacity is exceeded.
In the event that an over capacity condition occurs, the HCA
is actuated by sensing excessive pressure in the lift cylinder.
The following systems will be inoperative:
• boom down
• extend out
• hoist up
These are the functions that increase the over capacity
condition. This system allows for continued operation of the
hoist down, boom up and boom retract functions, the
functions that normally allow the operator to bring the load to
a shorter operating radius or set the load down in order to
eliminate an over capacity condition. Once the excessive
cylinder pressure has been reduced by bringing the load to a
shorter radius or setting the load down, normal operation can
be resumed. This hydraulic capacity alert system uses the
work port unloader solenoids in the anti-two-block system as
the hydraulic system dump circuit.
The hydraulic capacity alert system has an override switch
and button located on the operator’s console that
momentarily overrides the hydraulic capacity alert and anti-
two-block systems and restores power to crane functions.
Indicator Lights
Two indicator lights located on the operator’s console alert
the operator of function power loss and discriminate between
the HCA and the Anti-Two-Block or extension load limiting
systems as the cause of power loss.
HCA Load Range Gauge
The HCA provides a load range gauge at each operator
station. This gauge has three colors on the dial face: (1)
Green – OK, (2) Yellow – Caution, and (3) Red – Overload.
The gauge is plumbed directly to the lift cylinder and the
indicator position can be used as an aid in determining the
load condition of the crane. The lift control lever must be
moved from boom up position to the neutral position to get
the most accurate reading when using load range gauge.
The load range gauge is provided to aid the operator when
operating near the rated capacity of the crane.
NOTE: The gauge only provides accurate indication when
the lift control lever is in neutral.
The gauge movement is not proportional to the load on the
hook. Its not unusual for the indicator to be in the red area at
less than rated load condition when operating the lift control,
especially during boom down operation
.
CAUTION
Do not use the override to continue lifting operations in an
overload or two blocked condition.
CAUTION
Do not use the load range gauge with a extension.
Fo
r
Reference
Only
To Next Page
Loading...
Need help?
General
