Trouble Shooting of the Floor Crane
If the crane fails any of these tests, do not operate this crane until the problem is resolved
1. Read and understand Operator’s Manual before using the crane.
2. Make sure that the battery cable connector is fully engaged into the battery compartment of the crane.
3. Make sure there has not any leakage of oil from previous use.
4. Turn the key switch on and check the battery meter to ensure if there is full of battery supply.
5. Check that the raising and lowering of the forks are working properly. Give special attention to horn, speed controller and steering system.
6. Check the service brake operation by raising the handle to the vertical position and lowering it to the lowered position to see that it fully stops the crane in either position.
7. Observe the condition of the crane for any other malfunction or defect.
Problem | Possible cause |
NO LIFT (motor does not run) | l Faulty wiring from fuse to lift switch in handle. l Faulty lift switch l Faulty wiring from lift switch to pump contactor. l Faculty lift contactor l Faulty wiring from battery positive terminal to pump contactor, or from pump contactor to pump motor l Burned out brushes in pump motor l Defective control circuit fuse |
NO LIFT (Motor runs) | l Low hydraulic pressure caused by: - Pressure relief valve needs adjustment - Pump check valve stuck open - Faulty solenoid valve l Check oil level if forks do not rise fully l Check hydraulic pump operation l Defective control circuit fuse |
FORKS WILL NOT LOWER | l Faulty lowering switch on steering handle l Faulty wiring from lowering switch to solenoid valve l Faulty solenoid coil on soft shift control valve l Faulty soft shift control valve l Faulty load lowering valve l Faulty velocity fuse l Defective control circuit fuse |
NO ELECTRICAL POWER
NO ELECTRICAL POWER
| l No electrical power caused by: - Key switch in “OFF” position - Emergency disconnect button depressed - Faulty SB connector (or unplugged) - Loose battery connections - Blown control or power fuse l Faulty wiring from fuse to travel control switch l Faulty travel control switch l Faulty wiring from travel control switch t direction contactor l Faulty contactor l Check traction motor |
