Manitowoc 2250 Service Maintenance Manual

Reference Only
HYDRAULIC AND AIR SYSTEMS 2250 SERVICE/MAINTENANCE MANUAL
2-26
Published 07-19-16, Control # 249-01
MOISTURE EJECTOR VALVE
MAINTENANCE
General
See Figure 2-29 for the following.
The moisture ejector valve is fastened to the bottom of the air
tank for the purpose of automatically ejecting moisture which
settles in the bottom of the air tank. The valve has a heater
controlled by its own thermostat.
On some crane models, a moisture ejector valve is fastened
to the bottom of each air tank.
Control Handle Positions
See Figure 2-30 for the following procedures.
Automatic Operation
Turn the handle all the way out.
Shut-Off
Turn the handle all the way in.Turn the handle to this position
if the valve malfunctions. The crane can then be operated
until repairs or a replacement can be made at a convenient
time.
Operational Checks
Make the following checks after the engine is started at the
beginning of each work shift.
1. Check for air leaks. There must be no leaks in the pilot
line to the valve or at any point on the valve.
2. Observe the valve for proper operation.
The valve should eject air and moisture each time the
compressor cuts in at the low pressure setting and each
time the compressor cuts out at the high pressure
setting. See Table 2-13
for air system pressure settings.
3. If the valve does not operate properly, verify that the
handle is turned all the way out to the AUTOMATIC
position. If the valve still does not operate properly,
repair or replace the valve.
The valve should feel warm to the touch within 60
seconds after starting the engine when the outside
temperature is 2
°C (35°F) or less.
The heater should shut off when the valve temperature
rises to 41
°C (105°F).
If the heater does not operate properly, check the
electrical wires for continuity. One wire should be
connected to ground. The other wire should be
connected to the appropriate power supply (see the
electrical schematic in Electrical System
Section 3).
If the heater still does not operate properly, replace the
valve upper body, which houses the heater.
FIGURE 2-29
P297
Moisture Ejector
Valve
Eject Port
Governor Unloader
Pilot Line
Eject Port
Control Handle
Electric Wires
FIGURE 2-30
S110
Electric Wires
Handle
Shut-Off
Position
Eject
Port
Automatic
Position
Pilot
Port
Electric
Wires

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English