Machine Moves Neither Forward Nor Backward 2/2; Brake Cannot Be Released; Brake Does Not Work 1/2; Brake Does Not Work 2/2 - Sakai R2-4 Shop Manual

2-4-1. Machine moves neither forward nor backward 2/2

• Parking brake switch must be released.
• Foot brake switch must be ON (Brake pedal is not depressed).
Reference Fig.: 2-4-1
Check point
6. Harness Connecting
Between Terminals

2-4-2. Brake cannot be released

• Parking brake switch must be released.
Reference Fig.: 2-4-1
Check point
1. Parking Brake Solenoid
2. Parking Brake Switch
3. Harness Connecting
Between Terminals

2-4-3. Brake does not work 1/2

• Parking brake switch must be applied.
• Foot brake switch must be OFF (Brake pedal is depressed).
Reference Fig.: 2-4-1
Check point
1. Parking Brake Solenoid
2. Brake Relay
Check/Cause
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
Check/Cause
• Disconnect harness and measure resistance of coil.
Standard voltage : 8.5 Ω
• If measured resistance is abnormal, parking brake
solenoid is faulty.
(1) when starter switch is ON, measure voltage between
parking brake switch terminal 1 inlet wire WB and
chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON, measure voltage between
parking brake switch terminal 3 outlet wire GW and
chassis ground.
Standard voltage : 12 V or more
• If above item (1) is OK and item (2) is NG, parking brake
switch is faulty.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
Check/Cause
• Disconnect harness and measure resistance of coil.
Standard voltage : 8.5 Ω
• If measured resistance is abnormal, parking brake
solenoid is faulty.
(1) when starter switch is ON, measure voltage between
brake relay terminal 1 inlet wire BW and chassis
ground.
There is no electricity in normal condition.
(2) when starter switch is ON, measure voltage between
brake relay terminal 5 outlet wire BrB and chassis
ground.
There is no electricity in normal condition.
• If above item (1) is OK and item (2) is NG, brake relay is
faulty.
TROUBLESHOOTING
Action
Repair or replace
harness.
Action
Replace parking brake
solenoid.
Replace parking brake
switch.
Repair or replace
harness.
Action
Replace parking brake
solenoid.
Replace brake relay.
10-031