Manitowoc 2250 Service And Maintenance Manual

Reference Only
TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-56
Published 11-06-15, Control # 040-13
Test 21 — Checking Voltage at the Speed Encoders
Testing the boom hoist or load drum speed encoder for
correct voltages requires a standard test plug adapter (can
be ordered from Manitowoc Cranes, Inc.) and a digital multi-
meter.
To test incoming power at desired speed encoder:
• Engine must be off and power on, with all brakes and
locks engaged.
• Disconnect the output cable from the speed encoder
connector.
• Install the test plug adapter to the encoder.
• Connect the test plug adapter red (positive) and black
(negative) to digital multi-meter jacks.
• Start engine with all brakes and locks engaged.
• The motor or drum should remain at rest.
• Check for 12 volts DC.
• If this reading is not obtained, check 5 amp F11 fuse at
fuse panel (see Test 12 — Testing for Voltage at the
Fuse Box).
To test voltage output from the speed encoder to the PC:
• Engine must be off and power on, with all brakes and
locks engaged.
• Connect green (positive) and black (negative) wires to
digital multi-meter jacks.
• Check for 0.00 or 7.40 volts DC with motor or load drum
at rest.
• With the motor or load drum enabled, check for 3.5 to
3.9 volts DC.
• If these readings are not obtained, check the encoder
drive assembly and wiring.
Item Description
1 Encoder
2 Test plug adapter
3 Adapter cable connections
1
P1528
2
P1529
1
2 3
Load Drum Main Hoist Motor
3

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English