![Manitowoc National Crane 600E-2 Operator'S Manual Download Page 107](http://html.mh-extra.com/html/manitowoc/national-crane-600e-2/national-crane-600e-2_operators-manual_701266107.webp)
National Crane
PUBLISHED 04-26-2019 CONTROL # 113-09
6-5
600E2 OPERATOR MANUAL
MAINTENANCE CHECKLIST
6
and unequal tensions in the strands. This distortion and wire
displacement cannot be corrected even under high tension
and a permanent weak point remains in the rope. Displaced
or raised wires indicate a previous kink, but does not show
the damaged condition of the inner rope wires.
Never pull wire rope over a non-rotating support such as a
spindle bar, a pin, or an inoperative sheave. This practice
causes severe abrasion to the outer strand wires. A properly
operating sheave or snatch block is essential to safety and
long service life of the rope.
Do not use worn sheaves or sheaves with flat grooves
because they do not provide sufficient support to prevent the
distortion and flattening of the rope. Sheaves with nicked or
broken flanges can cut or otherwise damage the rope.
An even distribution of rope coils over the hoist drum is
essential to smooth operation. This prevents the rope from
cutting down through or crushing other coils on the drum
resulting in damage to and difficulty in unwinding the rope.
Rope Construction
If wire rope replacement is required for crane extension
system, replacement ropes must be obtained through the
Manitowoc Crane Care. Extension ropes are pre-stretched
and have special connections for proper operation
If wire rope replacement is required for crane loadline, care
should be taken in selecting a wire rope suitable for crane
use. Wire rope strength requirements are shown on the
crane load chart to match the hoist option selected when the
crane was purchased. Rope construction required is optional
with 6 x 25 and Dyform being the most common lifting ropes.
High strength, rotation resistant is preferred and furnished
standard by National Crane. This rope eliminates single part
line load spin. It also eliminates load block spin up when
multi-part reeving is used which results in prolonged rope
life.
CRANE ADJUSTMENTS AND REPAIRS
Before adjustments and repairs are started on a crane, the
following precautions shall be taken as applicable:
1.
A warning tag should be placed in a conspicuous place
at the controls stating that the machine requires
adjustment or repair before it can be operated.
2.
The crane should be placed where it will cause the least
interference with other equipment or operations in the
area.
3.
All controls at the off position and all operating features
secured from inadvertent motion by brakes or other
means.
4.
All methods used to start the truck's engine rendered
inoperative.
5.
Power plant stopped or disconnected at take-off.
6.
Boom lowered to the ground or otherwise secured
against dropping.
7.
Load block lowered to ground or otherwise secured
against dropping.
8.
Relieve hydraulic oil pressure from all hydraulic circuits
before loosening or removing hydraulic components.
After adjustments and repairs have been made, the crane
shall not be returned to service until all guards have been
reinstalled, trapped air removed from hydraulic system if
required, safety devices reactivated, and maintenance
equipment and all warning tags removed.
Any hazardous conditions disclosed by the inspection
requirements listed above shall be corrected before
operation of the crane is resumed. Adjustments and repairs
shall be done only by designated personnel who are properly
trained. Use only parts supplied by your National Crane
Distributor or Manitowoc Crane Care to repair the crane.
EXTENSION JACK SERVICE AND
MAINTENANCE
Important: Use only a good grade hydraulic jack oil,
transmission oil, or turbine oil. Avoid mixing types of oil. Do
not use brake fluid, alcohol, glycerin, detergent motor oil, or
dirty oil. Improper fluid can cause serious internal damage to
the jack rendering it inoperative.
Adding Oil
1.
With saddle fully lowered and piston depressed, set jack
in upright level position and remove oil filler plug.
2.
Fill until oil is level with filler plug hole.
Changing Oil
1.
For best performance and longest life, replace the
complete oil supply at least once a year.
2.
To drain the oil, remove the filler plug.
Standard
9/16 in. (14.3mm) Dia. Wire Rope:
Rotation Resistant
18X25 Nominal Breaking Strength:
19.25 Tons (17,463 kg)
Optional
9/16 in. (14.3mm) Dia. Wire Rope:
6X25 General Purpose
6X25 Nominal Breaking Strength:
16.8 tons (15,241 kg)
Fo
r
Reference
Only
Summary of Contents for National Crane 600E-2
Page 1: ...Operator Manual National Crane 600E 2 F o r R e f e r e n c e O n l y ...
Page 2: ...F o r R e f e r e n c e O n l y ...
Page 10: ...TOC 6 TABLE OF CONTENTS OPERATOR MANUAL 600E2 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Page 121: ...F o r R e f e r e n c e O n l y ...
Page 122: ...F o r R e f e r e n c e O n l y ...