National Crane Published 08/16/19 Control # 112-05 7-9
500E2 SERVICE MANUAL LUBRICATION
Swing Gearbox and Brake Oil
Check Swing Gearbox oil level:
The oil in the gearbox and brake sections is recommended to
be changed after first 50 hours of operation and every 500
hours of operation.
1. Examine the used oil for signs of significant metal
deposits.
2. Fill the swing gearbox with the appropriate amount and
type of oil and then replace plug and vent. See
“Lubrication Chart” on page 7-5.
To inspect the Swing gearbox oil level, remove the gearbox
fill/vent plug and visually inspecting the oil level. Maximum oil
level is to be 1” below the port for this gearbox with of gear
lube oil.
Gearbox lubricants are satisfactory for standard operation in
temperatures from -23° C to 82° C (-10° F to +180° F). For
operation outside this range, contact Manitowoc Crane Care
for recommendations.
HYDRAULIC OIL RESERVOIR LEVEL
The hydraulic oil reservoir has a sight gauge located on the
side of the reservoir. This sight gauge has a decal beside it
that indicates a “full” level and an “low oil” level. The oil
required to bring it from the “low” line to the “full” line is 5
gallons. Do not fill the reservoir above the “full” line. The oil
level should be checked with the crane parked on a level
surface in the transport condition (all cylinders retracted and
boom stowed) and the oil cold.
WIRE ROPE LUBRICATION
A wire rope cannot be lubricated sufficiently during
manufacture to last it’s entire life. Therefore, new lubricant
must be added throughout the life of a rope to replace factory
lubricant which is used or lost. It is important that lubricant
applied as part of a maintenance program shall be
compatible with the original lubricant, and to this end, the
rope manufacturer should be consulted. Lubricant applied
shall be of the type which does not hinder visual inspection.
Those sections of rope which are located over sheaves or
otherwise hidden during inspection and maintenance
procedures require special attention when lubricating rope.
The object of rope lubrication is to reduce internal friction and
to prevent corrosion.
During fabrication, ropes receive lubrication; the kind and
amount depends on the rope’s size, type, and anticipated
use. This in-process treatment will provide the finished rope
with ample protection for a reasonable time if it is stored
under proper conditions. But, when the rope is put into
service, the initial lubrication may be less than needed for the
full useful life of the rope. Because of this possibility, periodic
applications of a suitable rope lubricant are necessary.
The following are important characteristics of a good wire
rope lubricant:
1. It should be free from acids and alkalis.
2. It should have sufficient adhesive strength to remain on
the ropes.
3. It should be of a viscosity capable of penetrating the
interstices between wires and strands.
4. It should not be soluble in the medium surrounding it
under the actual operating conditions (i.e. Water).
5. It should have a high film strength.
6. It should resist oxidation.
Before applying lubrication, accumulations of dirt or other
abrasive material should be removed from the rope.
Cleaning can be accomplished by using a stiff wire brush and
solvent, compressed air, or live steam. Immediately after the
wire rope is cleaned, it should be lubricated. Many
techniques may be used; bath, dripping, pouring, swabbing,
painting, pressure spray.
Whenever possible, the lubricant should be applied at the
top of a bend in the rope, because at that point the strands
are spread by bending and are more easily penetrated.
There should be no load on the rope while it is being
lubricated. It should be noted, the service life of wire rope will
be directly proportional to the effectiveness of the method
used and amount of lubricant reaching the working parts of
the rope.
Sight Gauge
Hydraulic Oil Level
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