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Storage Inspection
1. A gantry crane that has been idle
for a period of a month or more,
but less than a year, must be inspected
before being placed in service according
to the Frequent Inspection requirements.
2. A gantry crane that has been idle for a
period of a year or more, must be inspected
before being placed in service according
to the Periodic Inspection requirements,
and then tested according to the
procedure in the Testing section below.
Maintenance
WARNING! TO PREVENT SERIOUS INJURY
FROM GANTRY CRANE FAILURE:
Do not use damaged equipment.
If any defect or damage is noted, have the
problem corrected before further use.
1. Repair or replacement of gantry crane
components must be performed
only by a qualified technician
using only identical replacement
parts with the same rating.
2. Some components may require adjustment.
The following are examples:
a. operating mechanisms
b. limit switches
c. control systems
d. brakes
3. Note the following regarding
specic components:
a. Replace damaged or worn hooks.
Do not repair them by welding or reshaping.
b. Replace or repair all critical parts
that are cracked, broken, bent,
excessively worn, or missing.
4. Do not repair load-sustaining members
by welding. Replace them as needed.
5. Lubrication:
a. Immobilize gantry crane before
lubrication by blocking casters.
b. Lubricate all moving parts regularly using
grease. Lubricate kingpin bearing raceway
on each caster, as shown in Figure B.
6. After maintenance work is completed and
before restoring the crane to normal operation:
a. reinstall guards;
b. reactivate safety devices;
c. remove replaced parts and loose material;
d. remove maintenance equipment.
Testing
1. Test repaired cranes and cranes
that have not been used for a year
or more, before being used.
2. First, with the crane unloaded,
check all functions of the crane, including:
a. lifting and lowering;
b. trolley travel;
c. bridge travel;
d. limit, locking and indicating
devices (if provided).
3. After testing in the unloaded state,
attach up to a 2,000 Ib. total load
(including trolley and hoist weight,
do not exceed trolley or hoist capacity)
and carefully retest to check proper
load control and to check brake operation
along the full length of the bridge.
SAFETYOPERATIONMAINTENANCE ASSEMBLY