Manitowoc MLC300 Guide

Lubrication Guide MLC300
F2280-34
Published 07-21-21
AUTOMATIC LUBRICATION SYSTEM
The crane has two grease systems that automatically grease
points on the turntable bearing and the rollers on each
crawler. Grease is pumped to each point at the intervals
given in Table 5
when the ignition switch is on. The grease
pumps use 24 VDC power.
Table 5 Automatic Greasing Intervals
Operation
See Figure 15 on page 32 and Figure 16 on page 33 on for
the following procedure.
The crane’s programmable controller controls the grease
pumps.
• The pumps push grease to the grease points when the
automatic grease system component is operating,
usually when the crane is swung or traveled. See Tab le
5 for greasing intervals.
• The pumps stop pumping when the automatic grease
system is not operating.
• The pumps also stop pumping if the crane’s ignition
switch is turned off.
• Each divider valve has an indicator pin (12) that extends
and retracts during a lubrication cycle.
Daily Inspection
See Figure 15 on page 32 and Figure 16 on page 33 on for
the following procedure.
To ensure maximum reliability and to protect crane
components, the automatic lubrication systems must be
inspected daily:
1. Check the grease level in each reservoir.
2. When the grease level reaches the MIN mark on the
reservoir, fill the reservoir to the MAX mark with a hand
operated grease pump through the grease fitting on the
pump housing.
Use a recommended grease (see Table 1
for the factory
fill).
3. Visually inspect the automatic lubrication systems:
a. Inspect the divider valve inlets, outlets, and
lubrication points for leaks.
b. Inspect for broken or cut grease lines.
c. Inspect the terminal ends of each grease line to
verify there are no leaks.
d. Tighten any fittings if grease leakage is detected.
4. With the power on, check that the pumps are working by
moving the swing and travel handles.
5. Check to see if the indicator pin on each valve is working
when the system is cycling. The indicator pin on each
valve should extend and retract.
6. If grease is pumped out through the pressure relief
valve, pressure within system is greater than 276 ±
17 bar (4,000 ± 247 psi). An obstructed grease line or
divider valve is indicated. Troubleshoot the system (see
the next page).
Manual Greasing
See Figure 15 on page 32 and Figure 16 on page 33.
Each divider valve is equipped with a grease fitting (4) so
that the crawler rollers and the turntable bearing can be
greased manually if the need arises.
Additionally, each crawler roller is equipped with a grease
fitting to allow manual greasing, if necessary.
Item Cycle Time Interval
Turntable Bearing 2 minutes Every hour
Crawler Roller Bearings Continuous
While
Traveling
Reservoir Capacity 4 L (1 gal)
Pump Output:
Turntable Bearing
Crawlers
2.8 cm
3
/min
8.0 cm
3
/min
CAUTION
Crawler/Turntable Bearing Hazard!
In extreme cold weather operation—temperatures down
to -40°C (-40°F)—pumps may not pump grease through
the automatic lubrication systems. It will be apparent that
the lines are obstructed when the pump pushes grease
out the relief valve.
If this occurs, grease the crawler rollers and the
turntable bearing manually using the grease fittings (4)
on the divider valves.
FOR REFERENCE
ONLY

Manitowoc MLC300 Specifications

General

Brand	Manitowoc
Model	MLC300
Category	Construction Equipment
Language	English