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

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