Yale 524150797 Maintenance Manual page 179

4000 YRM 1509
PROBLEM
Slow lifting speed and insufficient
handling capacity.
Forks fail to lower.
POSSIBLE CAUSE
Battery is discharged.
Oil in the hydraulic reservoir is low.
Faulty hydraulic equipment.
Deformed lifting components.
Load exceeds lifting capacity.
Battery is discharged.
Deformed forks.
Deformed lifting components.
Bent lift cylinder piston rod.
Lower switch or solenoid not oper-
ating properly.
Troubleshooting
PROCEDURE OR ACTION
Charge or replace battery. See the
section Periodic Maintenance for
your lift truck.
Fill reservoir to correct level.
Check for leaks. See the section
Hydraulic
1900YRM1506.
See the section Hydraulic System
1900YRM1506.
Disassemble and replace dam-
aged parts.
Select loads within capacity rating.
Charge or replace battery. See the
section Periodic Maintenance for
your lift truck.
Disassemble, repair, or replace.
Disassemble, repair, or replace.
See the section Hydraulic System
1900YRM1506.
Troubleshoot lower switch, lower-
ing solenoid, and wiring.
System
11