LUBRICATION NBT40 SERVICE MANUAL
8-10 Published 8-01-2017 Control # 287-11
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
1000 hours or 6 months of usage. Gearbox oil is drained by
removing the drain plug and remove the fill/vent plug for
ease of draining. (See Figure 8-5).
1. Examine the used oil for signs of significant metal
deposits and then dispose of it in a proper manner.
2. Replace the drain plug.
3. Fill the swing gearbox with the appropriate amount and
type of oil and replace fill/vent plug. See “Lubrication” on
page 3 of this manual.
Gearbox oil level inspection is achieved by removing 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 3.3 l (3.50 qt) 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 (Figure 8-6)
located on the side of the reservoir. The oil in the hydraulic
reservoir is sufficient when the level is between the High and
Low marks on the sight gauge with the crane parked on a
level surface in the transport position and the oil cold.
If the oil level is to low, add the recommended hydraulic oil
until the oil level is even with the upper mark. If the oil level is
high, drain oil until the oil level is even with the upper mark.
AIR CONDITIONING
When servicing air conditioner, evacuate system prior to
disconnecting any components connected to the pressurized
lines. Follow the specifications listed on section titled Air
Conditioner, page 9-32.
After servicing ensure air conditioning system is re-charged
with refrigerant and oil according to specifications listed on
(Table 8-2, page 8-5).
WIRE ROPE LUBRICATION
Wire rope is lubricated during manufacture and the lubricant
applied does not last the life of the rope. The wire rope must
be lubricated as part of a regularly scheduled maintenance
program. The lubricant applied must be compatible with the
original lubricant and not hinder visual inspection of the rope.
Consult the rope manufacturer for proper lubricant. The
sections of rope which are located over sheaves or
otherwise hidden during inspection and maintenance
procedures require special attention.
The object of rope lubrication is to reduce internal friction and
to prevent corrosion. The type and amount of lubrication
applied during manufacture depends on the rope size, type,
and anticipated use. This lubrication provides the finished
rope with protection for a reasonable time if the rope is
stored under proper conditions. When the rope is put into
service, periodic applications of a suitable rope lubricant are
necessary. Characteristics of a good wire rope lubricant are
that it should be:
• free from acids and alkalis.
• have sufficient adhesive strength to remain on the rope.
FIGURE 8-5
7462-32
Fill/Vent
Drain
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