Toyota Model 7HBW23 Service Manual
Section 5. Troubleshooting Symptom Tables: Travel (Forward/Reverse) System
Symptom Tables: Travel (Forward/Reverse) System NOTE: Reference electrical schematics beginning on Page A-9 and hydraulic schematic beginning on Page A-12.
Slow Travel, Lift/Lower OK. No Fault Codes Possible Cause
Action
Truck configured for slow acceleration
Check truck configuration.
Battery problems
Replace battery with fully-charged good battery.
Binding drive wheel assembly/drive motor
Jack and block truck. Disable brake.See “Mechanically Releasing the Brake” on page 6-34. Check that drive wheel spins freely. If not, repair or replace.
Binding brake disc
Check “Air Gap Adjustment” on page 6-33
Bad drive motor (may test OK with no load, but fail under load) or worn brushes
Repair or replace drive motor or brushes.
Truck Does Not Accelerate Correctly Possible Cause
Action
Truck configured for slow acceleration
Check truck configuration.
Battery problem
Verify a correct, fully-charged good battery (24V) is installed in truck.
Binding or mechanical problem
Jack and block truck. Turn Master Control ON/OFF switch ON. Check brake, wheel bearings and load wheels to see if there is a mechanical problem. Repair or replace.
Bad motor brushes or motor
With Master Control ON/OFF switch OFF and battery disconnected, check drive motor brushes and motor. See “Drive Motor Brush Inspection” on page 6-35. Repair or replace.
Bad power amplifier
If all other possible causes check out, replace power amplifier.
00700-CL340-05, Issued: 2 May 2005
5-39
