Test 7 - Checking Voltage At The Control Handle - Manitowoc 999 Service And Maintenance Manual

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999 SERVICE/MAINTENANCE MANUAL
Test 7 – Checking Voltage at the Control Handle
P1524
2
1
Use following test points to determine the correct voltages at
control handle:
Engine must be off and power on, with all brakes and
locks engaged.
Enable the test control handle and measure the voltage
with a digital multi-meter.
Hand
Test
Controller
Terminal
Left
Right
Swing
Center
3
4
Left
Right
Boom Hoist
Center
1
2
Left
Right
Right Travel
Center
3
4
Manitowoc
Item
1
Load Drum Handle
2
Boom/Swing Handle
3
Crawler Handle
4
Test Terminal
5
Ground Terminal "R"
Acceptable
Wire No.
Voltage (DC)
87FA
10
0
Ground
WA-08
1.4 to 8.6
8S Brake
12
WD-15 Brake
12
87FA
10
0
Ground
WA-05
1.4 to 8.6
0
Ground
WD-29
12
87FA
10
0
Ground
WA-06
1.4 to 8.6
8A
12
WB-01
12
Published 05-16-17, Control # 233-03
3
Description
The positive lead must be placed on the test terminal
and the negative lead on a grounded crane component
or on terminal "R".
Voltages outside the normal range may indicate a
problem with the control handle, electrical circuit, or
electrical components.
Hand
Test
Controller
Terminal
Left
Left Travel
Right
Center
Left
Right
Front Load
Center
Drum
1
2
Left
Right
Rear Load
Center
Drum
3
4
TROUBLESHOOTING
4
5
Acceptable
Wire No.
Voltage (DC)
87FA
10
0
Ground
WA-07
1.4 to 8.6
87FA
10
0
Ground
WA-03
1.4 to 8.6
0
Ground
WD-27
12
87FA
10
0
Ground
WA-04
1.4 to 8.6
0
Ground
WD-28
12
10-39
10

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