The Skyjack SJ9250 RT is a rugged telescopic boom lift designed for rough terrain. Its instrument cluster provides critical warnings and indicators for safe operation, including engine, hydraulic, and stability systems.
Skyjack SJ9250 RT Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical system failure has occurred, such as engine shutdown or hydraulic pressure loss, requiring immediate operator action on the SJ9250 RT. | Stop the machine safely and consult the operator's manual for the specific fault code. | |
| Check Engine (MIL) | AMBER | The ECU has detected an engine fault that may reduce performance or emissions, common on the SJ9250 RT's Tier 4 diesel engine. | Contact service to diagnose with a scan tool; reduce load and monitor for drivability issues. | |
| Engine Oil Pressure | RED | Engine oil pressure has dropped below safe levels, risking engine damage on the SJ9250 RT's turbocharged diesel. | Immediately stop the engine and check oil level; do not restart until resolved. | |
| Battery / Charging | RED | The alternator is not charging the battery or voltage is too low for the SJ9250 RT's electrical systems. | Check alternator belt and connections; if persistent, replace battery or alternator. | |
| Coolant Temperature | RED | Engine coolant temperature has exceeded the safe limit on the SJ9250 RT, often due to low coolant or fan failure. | Stop and let engine cool; check coolant level and radiator for blockages. | |
| Parking Brake | RED | Indicates the parking brake is engaged or a fault in the brake system on the SJ9250 RT. | Release the parking brake before moving; if light stays on, service the brake system. | |
| Seat Belt | RED | The operator's seat belt is not fastened; the SJ9250 RT requires it for machine operation. | Fasten your seat belt immediately to proceed. | |
| Low Fuel | AMBER | Fuel level is low in the SJ9250 RT's tank, which could lead to air in the fuel system. | Refuel as soon as possible to avoid engine stalling and priming issues. | |
| Hydraulic System | RED | A hydraulic system fault, such as low oil level or filter blockage, affecting the SJ9250 RT's lift and drive functions. | Stop operation; check hydraulic fluid level and filter; contact service if unresolved. | |
| Glow Plug / Preheat | AMBER | The glow plugs are preheating the engine for cold starts on the SJ9250 RT; light off when ready. | Wait for the light to turn off before cranking the engine. | |
| Water in Fuel | AMBER | Water has been detected in the fuel system of the SJ9250 RT, which can cause injector damage. | Drain the fuel/water separator immediately; replace fuel filter if necessary. | |
| Air Filter | AMBER | Engine air filter is clogged, reducing power and fuel efficiency on the SJ9250 RT. | Inspect and replace the air filter element as per maintenance schedule. | |
| Overload / Capacity | RED | The basket load exceeds the rated capacity of the SJ9250 RT, triggering a safety shutdown. | Reduce load immediately until the alarm stops; do not operate overloaded. |
13 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheat
Common causes
- Low coolant level
- Faulty radiator fan
- Blocked radiator fins
What to do
For the SJ9250 RT, stop engine, let it cool, then check coolant level and radiator for debris. Replace fan belt if loose or damaged.
Hydraulic System Failure
Common causes
- Low hydraulic oil level
- Clogged hydraulic filter
- Pump failure
What to do
On the SJ9250 RT, verify hydraulic oil level and condition. Replace filter and check for leaks. If pump is noisy, contact service.
Battery/Charging Issue
Common causes
- Loose alternator belt
- Faulty alternator
- Poor battery connections
What to do
Inspect alternator belt tension and wiring on the SJ9250 RT. Clean battery terminals and ensure alternator output is 13.8-14.2V.
Engine Stalling or No Start
Common causes
- Low fuel or water in fuel
- Glow plug failure (cold weather)
- Fuel filter blockage
What to do
For the SJ9250 RT, check fuel level and drain water separator. In cold temps, ensure glow plugs cycle. Replace fuel filter if clogged.
Overload Warning Active
Common causes
- Basket capacity exceeded
- Load sensor malfunction
- Incorrect outrigger setup
What to do
Reduce load to within SJ9250 RT capacity (500 lb). If light persists with no load, calibrate load sensors per service manual.
Frequently Asked Questions
Why does the master warning light come on intermittently?
On the SJ9250 RT, intermittent master warnings often indicate a loose wire or intermittent sensor fault; check harness connections to the engine and hydraulic solenoids.
How long should I wait for the glow plug light to turn off?
The glow plug light on the SJ9250 RT typically goes out after 5-10 seconds in cold weather; if it stays on longer, the glow plug relay may be faulty.
Can I operate with the water in fuel light on?
No, operating with water in fuel can damage injectors on the SJ9250 RT. Drain the separator and replace the filter before continuing.
What does the hydraulic light mean when the machine is cold?
In cold temperatures, the hydraulic light may briefly illuminate until oil warms up; if it stays on, check hydraulic fluid level and for air in the system.
How often should I check the air filter indicator?
Inspect the air filter restriction indicator (if equipped) on the SJ9250 RT daily; replace the filter when the gauge shows red or at scheduled intervals (every 250 hours).
Why does the check engine light flash and then stay on?
A flashing check engine light on the SJ9250 RT indicates a severe fault; if it stays on solid, the ECM has stored a diagnostic code that needs professional retrieval.