National Crane Published 4-23-2018 Control # 239-11 5-9
NBT40 SERIES OPERATOR 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
1000 hours or 6 months of usage. Gearbox oil is drained by
removing the drain plug and removing the fill/vent plug for
ease of draining.(Figure 5-5)
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 5-3 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 (1, Figure 5-6)
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
FIGURE 5-5
7462-32
Fill/Vent
Drain
To Next Page
Loading...
Need help?
General
