Manitowoc Published 11-06-15, Control # 040-13 10-51
2250 SERVICE/MAINTENANCE MANUAL TROUBLESHOOTING
To determine if a hydraulic solenoid is enabled, place a
screwdriver on the solenoid coil. The solenoid is enabled if
the screwdriver is magnetically pulled toward the solenoid
coil.
Measure system voltage at various locations on the
hydraulic valve assemblies with a standard test plug adapter
(can be ordered from Manitowoc Cranes, Inc.) and a digital
multi-meter.
To test a hydraulic valve:
• Set the digital multi-meter for testing volts DC.
• Connect white (positive) and black (negative) wires from
adapter cable to digital multi-meter jacks.
• Install the test plug between the valve electrical socket
and the DIN plug.
• Enable the valve under test.
• Check for 12 volts DC at upper valve assembly and
auxiliary system disable valve.
• Voltage to the proportional flow control valve should be
between 3.25 and 7.22 volts DC.
6 Luffing hoist brake solenoid valve
7 Travel 2-speed solenoid valve
8 Travel brake solenoid valve
9
Swing lock solenoid valve (top disengage/bottom engage)
Current production cranes the swing lock is disabled
Swing lock solenoid is not present on current production cranes
10 Swing brake solenoid valve
11 Left crawler pins solenoid valve (top retract/bottom extend)
12 Right crawler pins solenoid valve (top retract/bottom extend)
13 Boom hinge pins solenoid valve (top retract/bottom extend)
14 Boom butt handling solenoid valve (top retract/bottom extend)
15 Rigging winch solenoid valve (top pay out/bottom haul in)
Item Description
15
P927
13
14
12
11
109
8
7
6
5
In Carbody
To Next Page
Loading...
Need help?
General
