11-103
TROUBLESHOOTING
2-5-4. Machine speed cannot be changed
Parking brake switch must be released.
Foot brake switch must be ON (Brake pedal is not depressed).
Reference Fig.: 2-5-1
Check point
Check/Cause
Action
1. Speed Change Switch (1) when starter switch is ON, measure voltage between
speed change switch terminal 1 inlet wire YW and
chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON and speed change switch is
“
”, measure voltage between speed change switch
terminal 3 outlet wire BrR and chassis ground.
Standard voltage : 12 V or more
(3) when starter switch is ON and speed change switch is
“
”, measure voltage between speed change switch
terminal 3 outlet wire BrR and chassis ground.
There is no electricity in normal condition.
If above item (1) is OK and item (2) or (3) is NG, speed
change switch is faulty.
•
Replace speed change
switch.
2. Resistor Unit
Measure resistance between resistor unit wire No. 39 wire
BrR and ground wire.
Standard resistance : 300 Ω
If resistance is abnormal, resistor unit is faulty.
(NOTICE)
Resistor unit is used to stabilize contact of switch.
•
•
•
Replace resistor unit.
3. Traveling Controller
(1) when starter switch is ON, measure voltage between
traveling controller power supply terminal 2 inlet wire
WB and ground terminal 1 wire B.
Standard voltage : 12 V or more
(2) when starter switch is ON and speed change switch is
“
”, measure voltage between traveling controller
terminal 25 inlet wire BrR and terminal 1 wire B.
Standard voltage : 12 V or more
If items (1) and (2) are OK, traveling controller is faulty.
•
Replace traveling
controller.
4. Harness Connecting
Between Terminals
Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.
•
•
Содержание SW880-1
Страница 1: ...SW880 1 990 1 SHOP MANUAL 3498 6568A 0 ...
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Страница 15: ...SAFETY ...
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Страница 25: ...SPECIFICATIONS ...
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Страница 39: ...ENGINE AND CONTROLS ...
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Страница 47: ...HYDRAULIC SYSTEMS ...
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Страница 83: ...ELECTRICAL SYSTEM ...
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Страница 125: ...VIBRATORY DRUM ...
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Страница 183: ...INSPECTION AND ADJUSTMENT ...
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Страница 209: ...TROUBLESHOOTING ...
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