National Crane Published 10-30-2014 Control # 040-09 2-9
1400H OPERATOR AND SERVICE MANUAL OPERATING CONTROLS
OPERATING PROCEDURES
All members of the crew should become thoroughly
familiar with the location and operation of controls, the
correct operating procedure, the maximum lifting capacities
and the safety precautions applicable to the unit before
operating. This crane is a complex piece of equipment and
can be overloaded in many ways. Carefully follow the
operating procedures outlined below and the load rating
chart at the operator's station.
Equipment Checks
Perform the following checks prior to placing the unit in
operation:
• Inspect for any unusual conditions such as pools of
hydraulic fluid or lubricating oil under the chassis, any
outrigger which may have crept down or up and any
signs of damage or improper maintenance.
• Check that the tires are inflated to the proper
pressure.
• Check the level of the hydraulic reservoir.
• Check the operation of the “emergency stop” and
horn circuits.
• Check for missing and loose bolts.
• Check for damaged structural members and welds.
• Check all rope guides and cable keepers.
• Check all sheaves for free turning.
• Check the loadline cable for kinks, broken strands
or other damage in accordance with instructions in the
“Service & Maintenance” section.
• Check to see that the hydraulic hoses and fittings
are in good condition and show no signs of leaking. The
hoses should be free from cuts and abrasions and there
should be no evidence of binding. Any damage or
leakage should be repaired immediately.
• Check RCL and anti-two-block system for proper
operation. See RCL Service and Maintenance
Procedure.
Note: Consult truck manufacturer’s manual for vehicle
checks.
RCL Inspection Procedure
Prior to operating the crane, the following electrical
connections must be checked to ensure that the system is
properly connected for the crane configuration.
If the crane works only with the boom and without boom
extensions (jibs), no additional connections are necessary.
Be sure that the weight of the anti-two-block (ATB) switch is
properly installed on the hoist load line on the first fall of rope
coming off the boom tip.
Proper installation of the ATB weight is as shown in the
following picture. Be sure that the wire rope cannot
disengage from the weight without disconnecting the link.
If the crane works with a boom extension (jib), the
female connector at the rear of the jib must be plugged into
the male connector at the end of the main boom to make the
ATB switch at the tip of the jib operational. This will require
unplugging the main boom ATB switch. The weight attached
to the main boom ATB switch must also be removed and
reinstalled on the jib ATB switch. After removal of the weight,
the main boom ATB switch must then be locked with the red
ATB retainer (which is attached to the switch with a spring
clip). The weight must be reattached to the jib ATB switch
and installed on the loadline coming off the jib tip.
RIG SUPPORTING CHAIN SO
LOADLINE CANNOT COME OUT
OF SLOT
876996
To Next Page
Loading...
