Manitowoc Published 11-06-15, Control # 040-13 10-49
2250 SERVICE/MAINTENANCE MANUAL TROUBLESHOOTING
Test 15 — Checking System Voltage at the Air Solenoid Panel
To determine if an air solenoid is enabled, place a
screwdriver on the solenoid coil. The solenoid is enabled if
the screwdriver is magnetically pulled toward the solenoid
coil.
Testing air solenoid valves for correct voltage and amperage
requires a standard test plug adapter (which can be ordered
from Manitowoc Cranes, Inc.) and a digital multi-meter.
Connect the test plug adapter between the solenoid valve
and electrical connector. Make the connections form the
adapter cable white (positive) and black (negative) wires to
the digital multi-meter and check for 12 volts DC while
enabling the air solenoid being tested. Load current (amps)
can be measured by making current connections (red and
white) to digital multi-meter.
Item Description Item Description
1 Front drum clutch solenoid 10 Luffing hoist pawl in solenoid
2 Front drum park brake solenoid 11 Backhitch pin cylinders retract solenoid
3 Rear or right rear drum clutch solenoid 12 Backhitch pin cylinders extend solenoid
4 Rear or right rear drum park brake solenoid 13 Upper counterweight pin cylinders retract solenoid
5 Left rear drum clutch solenoid 14 Upper counterweight pin cylinders extend solenoid
6 Left rear drum park brake solenoid 15 Lower counterweight pin cylinders retract solenoid
7 Boom hoist pawl out solenoid 16 Lower counterweight pin cylinders extend solenoid
8 Boom hoist pawl in solenoid 17 Air Manifold
9 Luffing hoist pawl out solenoid
1
P913
3
5
7
9
11
13
17
15
2
4
6
8
10
12
14
16
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