The Skyjack SJ45T telehandler's instrument cluster provides critical machine status warnings. Red lights demand immediate stop, amber signals caution, and green/blue indicate active functions or normal operation.
Skyjack SJ45T Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system fault has occurred on the SJ45T, such as engine shutdown or hydraulic failure, requiring immediate attention. | Stop the machine immediately and consult the operator’s manual. | |
| Master Caution | AMBER | A non-critical system warning on the SJ45T needs review, such as low fluid or filter restriction. | Check the secondary warning light and service as needed. | |
| Check Engine | AMBER | The SJ45T’s engine control module has detected an emissions or performance fault. | Reduce load and have the engine diagnosed by a technician. | |
| Oil Pressure | RED | Engine oil pressure in the SJ45T is below safe operating range, risking engine damage. | Stop engine immediately and check oil level. | |
| Battery / Charging | RED | The SJ45T’s charging system voltage is abnormal, possibly due to alternator or battery failure. | Check battery connections and alternator operation. | |
| Coolant Temperature | RED | Engine coolant temperature on the SJ45T is too high; continued operation may cause overheating. | Stop machine and allow engine to cool; check coolant level. | |
| Brake System | RED | The SJ45T’s hydraulic brake system pressure is low or a fault is detected. | Engage parking brake and inspect brake lines and fluid. | |
| Parking Brake | AMBER | The parking brake on the SJ45T is engaged or not fully released. | Release parking brake before driving. | |
| Seat Belt | AMBER | The operator’s seat belt on the SJ45T is unbuckled; machine functions may be restricted. | Fasten seat belt to enable operation. | |
| Low Fuel | AMBER | Fuel level in the SJ45T is below 10% capacity. | Refuel as soon as possible. | |
| High Beam | BLUE | The SJ45T’s high-beam headlights are activated. | No action needed unless blinding others. | |
| Hydraulic System | RED | The SJ45T’s hydraulic system has a critical fault, such as pump failure or leak. | Stop operation and inspect hydraulic lines and fluid. | |
| Fasten Seat Belt | RED | The operator seat belt on the SJ45T is not fastened and machine movement is locked. | Fasten seat belt immediately. | |
| Hydraulic Oil | AMBER | Hydraulic oil level or temperature on the SJ45T is outside normal range. | Check hydraulic oil level and allow system to cool. | |
| Engine Oil Temperature | AMBER | Engine oil temperature on the SJ45T is elevated, reducing lubrication effectiveness. | Reduce engine load and allow cooling. | |
| Air Filter | AMBER | The engine air filter on the SJ45T is restricted and needs replacement. | Replace air filter per maintenance schedule. | |
| Fuel Filter / Water Separator | AMBER | Water or contamination is detected in the SJ45T’s fuel system. | Drain water from separator and replace fuel filter. | |
| Service / Hour Meter | GREEN | Indicates the SJ45T has reached a scheduled maintenance interval. | Perform required service per manual. | |
| Work Lights | GREEN | The SJ45T’s work lights are turned on. | No action needed. | |
| Beacon / Rotating Light | GREEN | The amber beacon on the SJ45T is active, indicating the machine is in operation. | No action needed. | |
| Swing / Slew Lock | AMBER | The turret swing lock on the SJ45T is engaged, preventing rotation. | Disengage swing lock before moving the upper structure. | |
| Overload / Capacity | RED | The SJ45T’s load exceeds the rated capacity, risking tip-over or structural damage. | Lower or remove load immediately to reduce the load. | |
| Low Oil Level | AMBER | Engine oil level on the SJ45T is below the safe minimum. | Add engine oil to proper level. | |
| Brake Fluid Level | RED | Brake fluid level in the SJ45T is critically low, causing reduced braking force. | Top up brake fluid and inspect for leaks. | |
| Door Open | AMBER | The operator door on the SJ45T is not fully closed. | Close the door securely. | |
| Glow Plug / Preheat | AMBER | The SJ45T’s glow plugs are active for cold start assistance. | Wait until indicator goes out before starting. | |
| Reduced Power (Limp Mode) | AMBER | The SJ45T’s engine power is limited to protect the drivetrain or emissions system. | Reduce load and drive to a service area. | |
| Water in Fuel | AMBER | Water has accumulated in the SJ45T’s fuel filter/water separator. | Drain the water separator immediately. |
28 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheating
Common causes
- Low coolant level
- Clogged radiator fins
- Malfunctioning cooling fan
What to do
Stop the SJ45T, let engine cool, check coolant level and radiator cleanliness; clean fins and refill coolant if low.
Hydraulic Overload
Common causes
- Exceeding rated lift capacity
- Uneven load distribution
- Hydraulic system leak
What to do
Immediately lower the load and redistribute it within the SJ45T’s capacity; inspect hydraulic hoses for leaks.
Low Hydraulic Oil Level
Common causes
- Leak in hydraulic circuit
- Insufficient maintenance
- Damaged hose or fitting
What to do
Park the SJ45T on level ground, check hydraulic oil reservoir, and top off or repair leaks before resuming operation.
Brake System Failure
Common causes
- Brake fluid leak
- Worn brake pads
- Air in brake lines
What to do
Engage parking brake immediately, check brake fluid level and lines for leaks; bleed brakes if needed on the SJ45T.
Engine Fuel Starvation
Common causes
- Empty fuel tank
- Clogged fuel filter
- Water in fuel
What to do
Add diesel to the SJ45T’s tank, replace the fuel filter, and drain water from the separator.
Frequently Asked Questions
Why does the red stop light stay on after startup?
On the SJ45T, the red master warning indicates a critical fault; check for other lit warnings like low oil pressure or high coolant temperature, and do not operate until resolved.
How do I clear the amber master caution light?
Turn the ignition off and on; if the light remains, use the cluster diagnostic mode to view the active fault code on the SJ45T and address the underlying issue.
What should I do if the overload light blinks?
The SJ45T’s overload light means capacity is exceeded; slowly lower or remove load until the light goes off to avoid tip-over.
Can I continue operating with the hydraulic oil light on?
No, the amber hydraulic oil light on the SJ45T indicates low oil or high temperature; stop and check level to prevent pump damage.
Why is the parking brake light on while driving?
The parking brake may not have fully released; on the SJ45T, try disengaging the brake lever fully or check the brake switch adjustment.
How often should I service the air filter on the SJ45T?
The air filter light illuminates when restriction is high; service every 250 hours or as indicated by the cluster on the SJ45T.