Section 5. Troubleshooting
Toyota Model 7HBW23 Service Manual
Symptom Tables: Lift/Lower System
Load Drifting/Settling Possible Cause
Action
Incorrect lift pressure adjustment
Check and adjust lift pressure setting.
Contaminated or bad check valve
Check for contamination in hydraulic fluid. If contamination is present, flush, fill and bleed the hydraulic system. Clean the check valve. If no contamination is found, replace check valve.
Leaking or contaminated lowering solenoid valve
Check for contamination in hydraulic fluid. If contamination is present, flush, fill and bleed the hydraulic system. Clean the solenoid valve. If no contamination is found, replace the solenoid valve.
Load too large for lift truck capacity
Check load weight. Check lift pressure setting.
No Lift or Lower. No Fault Codes '
5-38
Possible Cause
Action
Throttle magnet-actuator arm (in control handle) out of adjustment
Check with service display and repair as needed. Bad ETAC. If no other problems are noted but the ETAC does not detect the presence of the magnet, replace the ETAC.
Lift contactor missing, open or short circuit in lift circuit (contactor, wiring, motor), Bad power amplifier
Perform standard electrical troubleshooting procedures in the lift circuit.
Incorrect ETAC software installed.
Note: this is only possible if ETAC was recently replaced. Lowering may not occur if incorrect software was inadvertently installed (drive function will also not function correctly). Check for correct software part number and replace ETAC if not correct.
00700-CL340-05, Issued: 2 May 2005
