National Crane
PUBLISHED 04-26-2019 CONTROL # 113-09
6-9
600E2 OPERATOR MANUAL
MAINTENANCE CHECKLIST
6
Hoist will not lift or hold load
Load too heavy.
Check load and change to applicable
multipart reeving.
Relief valve setting too low.
Check and adjust if required.
Motor worn excessively.
Replace motor.
Counterbalance valve defective or
leaking.
Clean and replace as necessary.
Anti-two-block system defective.
Repair anti-two-block system.
Brake worn out.
Repair or replace brake.
Hoist gearbox heats
Gearbox grease low.
Check and fill as required.
Duty cycle too high.
Reduce cycle time or speed of hoist.
Boom chatters during extension/
retraction or doesn't proportion
properly
Boom sections need lubrication.
Grease boom.
Wear pads not shimmed correctly.
Re-shim as described in boom assembly
section.
Worn wear pads.
Replace pads.
Extension cables out of adjustment.
Readjust cables and tension properly.
Extend or retract cables broken.
Disassemble and inspect and replace
cables.
Boom will not extend
Proportioning cables not attached.
Reconnect, replace and/or adjust cables.
Anti-two-block system shut down.
Lower hook, and extend load.
Defective anti-two-block system
Check anti-two-block system; repair if
defective.
System is in a state of constant
cut-out
Loose or incorrect wiring.
Carefully check the integrity of all circuits
external to the electronics box, from the
extension tip to the console. Compare to
electrical schematic.
Blown fuse.
Check fuse at crane console. Replace if
necessary. Remove electronics box from
extension, remove electronics from housing,
and check 2A fuse on board. Replace if
necessary.
ATB switch open.
Ensure that ATB switch is closed.
No table selected.
Follow procedure in system installation
section to select the correct table for the
application.
System is in a state of constant cut-
out (continued)
Load cell not calibrated.
To set the zero point, remove all force from
the load cell. Remove the electronics from
the housing. Set the switch position 8 to ON.
Power the system. Do not turn off power
until both the zero point and the gain have
been set. To set the zero point, press the
button on the board. To set the gain, set
switch position 8 to OFF. Set the switch to
the correct code that matches the load cell
gain. This code can be found on the tag that
accompanies the load cell. Press the button.
Condition
Possible Cause
Possible Solution
Fo
r
Reference
Only
Содержание National Crane 600E-2
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