NATIONAL CRANE Published 09-06-2019 Control # 691-01 6-3
NBT60L OPERATOR MANUAL MAINTENANCE CHECKLIST
12. Unwind the loadline and check according to rope
maintenance procedure.
13. PTO for possible leaks. Tighten all air, hydraulic, and
mounting hardware per manufacturer’s specifications.
Re-torque as necessary.
Periodic/Annual Inspection
Check the following items:
1. All items listed under daily, weekly, and monthly
inspections.
2. Loose bolts and fasteners in all areas. Torque pin
retainer bolts.
3. All pins, bearings, shafts, and gears for wear cracks or
distortion to include all pivot, outriggers and sheave
pins, and bearings.
4. Boom angle and boom length indicator for accuracy over
full range.
5. Hydraulic systems for proper operating pressure.
6. Outrigger pads for excessive wear or cracks.
7. Cylinders for:
a. Damaged rods
b. Dented barrels
c. Drift from oil leaking by piston
d. Leaks at rod seals, welds, or holding valves.
8. PTO drive line system for proper alignment, lubrication,
and tightness per PTO manufacturer’s specifications.
9. Hydraulic hose and tubing for evidence of damage such
as blistering, crushing, or abrasion.
10. Top and bottom wear pads for excessive wear.
11. Inspect all electrical wires and connections for worn, cut
or deteriorated insulation and bare wire. Replace or
repair wires as required.
12. Extend and retract ropes, sheaves, pins, and bearings
for wear or abrasion.
13. Main frame and jack mounting bolts for proper torque
(see Service Manual).
14. Rotation bearing and gearbox mounting bolts for proper
torque (see Service Manual).
15. Missing or unreadable warning labels.
16. Missing or unusable/unsafe condition of steps, ladders,
handrails, guards or seat.
Special Boom Inspection
If the boom has not been disassembled and inspected in the
last seven years of use, the boom is to be completely torn
down to allow a thorough inspection of the extend and retract
ropes, sheaves, and pins.
Stability
Stability of unit throughout working area. Check the stability
procedure in Installation Section of the NBT60L Service
Manual annually or when any changes are made to crane or
truck.
HOIST ROPE INSPECTION AND
MAINTENANCE
Hoist rope should be inspected frequently/daily and
periodically/yearly in accordance with the following
information excerpted from a National Consensus Standard
as referenced by Federal Government Agencies.
Recommended inspection intervals may vary from machine
to machine and may vary based on environmental
conditions, frequency of lifts, and exposure to shock loads.
The inspection time intervals may also be predetermined by
state and local regulatory agencies.
NOTE: Hoist rope may be purchased through Manitowoc
Crane Care.
Any deterioration observed in the wire rope should be noted
in the equipment inspection log and an assessment
concerning wire rope replacement should be made by a
qualified person.
Keeping Records
A signed and dated report of the rope’s condition at each
periodic inspection must be kept on file at all times. The
report must cover all inspection points listed in this section.
The information in the records can then be used to establish
data which can be used to determine when a rope should be
replaced.
It is recommended that the rope inspection program include
reports on the examination of rope removed from service.
This information can be used to establish a relationship
between visual inspection and the rope’s actual internal
condition at the time of removal from service.
Environmental Conditions
The life expectancy of rope may vary due to the degree of
environmental hostility and other conditions to which these
mechanical devices are subjected. Variation in temperature,
continuous excessive moisture levels, exposure to corrosive
WARNING
Worn or Damaged Equipment Hazard!
Never use a worn or damaged rope. Death or serious
injury could result from using worn or damaged rope.
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