NATIONAL CRANE
Published 11-01-2020 Control # 710-00
5-9
NBT60XL OPERATOR MANUAL
LUBRICATION PROCEDURE AND CHARTS
5
3.
Install a short 1 inch (25 mm) pipe in the outer threads
around the drain and fill plug (Figure 5-4).
NOTE:
Place an oil pan or other receptacle under the drain
pipe as needed.
4.
Using a 5/16 inch (8 mm) Allen wrench, remove the
drain and fill plug through the drain pipe. Allow the oil to
drain from the hoist completely.
5.
Inspect the O-ring on the drain and fill plug. Replace as
needed.
6.
Install the drain and fill plug through the 1 inch (25 mm)
drain pipe using a 5/16 inch (8 mm) Allen wrench.
Torque the fill and drain plug to 67.8 Nm (50 ft-lb).
7.
Remove the 1 inch (25 mm) drain pipe from access
hole.
8.
Coat the vent plug (2, Figure 5-3) threads with oil and
install the vent plug.
Fill the Gearbox and Brake Oil
1.
Rotate the hoist drum so the plug aligns with the oil fill
access hole at the 3 o’clock position (4, Figure 5-3).
2.
Using a 5/16 inch (8 mm) Allen wrench, remove the
drain and fill plug (Figure 5-4).
3.
Fill the hoist gearbox and brake with oil. See
, page 5-3 for specific lubricants.
4.
Visually inspect the oil level through the sight glass (1,
Figure 5-3). When done filling, the oil level should be
approximately half-way up in the sight glass.
5.
Using a 5/16 inch (8 mm) Allen wrench, install and
tighten the drain and fill plug (4, Figure 5-4). Torque the
drain and fill plug to 67.8 Nm (50 ft-lb).
Swing Gearbox Oil
The oil in the gearbox is recommended to be changed after
first 50 hours of operation and every 500 hours thereafter.
1.
Remove the drain plug (1, Figure 5-5
and vent plug (2)
to drain the gearbox oil
.
2.
Examine the used oil for signs of significant metal
deposits and then dispose of it in a proper manner.
3.
Replace the drain plug (1). Inspect and replace the o-
ring as needed.
4.
Remove the oil level/fill plug (3). Fill the swing gearbox
with 2.4 l (2.5 qt) of the appropriate type of oil, and then
replace the vent plug (2) and level/fill plug (3). Inspect
and replace the o-rings as needed.
of this manual
.
5.
Inspect the outside of the swing gearbox daily for any
visible leaks. The maximum oil capacity for this gearbox
is 2.4 l (2.5 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
Drain and
fill plug
Drain and fill plug
outer threads
FIGURE 5-4
Access hole
9674
CAUTION
The hoist gearbox and brake holds a maximum of 5.44
liters (11.5 pints) of oil. Under- or over-filling the hoist can
lead to damage of equipment.
Fo
r
Reference
Only
