Sakai SW880-1, Shop Manual

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TROUBLESHOOTING
2-5-5. Auto speed function does not work 9/9
Parking brake switch must be released.
Foot brake switch must be ON (Brake pedal is not depressed).
Set speed change switch to “
”.
(Automatic speed function is disabled when speed change switch is “ ”.)
Check that speed can be changed by speed change switch between operation speed (“ ”) and traveling
speed (“ ”).
Set throttle switch to “FULL”.
(Automatic speed function is disabled when throttle switch is in any other position than “FULL”.)
Check whether exact meter multiple display shows any error code.
2) when display shows no error code
Reference Fig.: 2-5-1
Check point Check/Cause Action
1. F-R Lever Auto Speed
Set Switch
(1) when starter switch is ON, measure voltage between
F-R lever auto speed set switch terminal COM inlet wire
YW and chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON and F-R lever auto speed
set switch is ON, measure voltage between F-R lever
auto speed set switch terminal NO outlet wire GY and
chassis ground.
Standard voltage : 12 V or more
If above item (1) is OK and item (2) is NG, F-R lever auto
speed set switch is faulty.
•
Replace F-R lever auto
speed set switch.
2. Resistor Unit Measure resistance between resistor unit wire No.38 wire
GY 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 F-R lever auto speed
set switch is ON, measure voltage between traveling
controller terminal 21 inlet wire GY and terminal 1 wire
B.
Standard voltage : 12 V or more
If above items (1) and (2) are OK and no error code is
displayed, 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.
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