The McCormick X4.35 is a versatile utility tractor powered by a 4.5L, 4-cylinder turbocharged diesel engine, designed for both field and loader work. Its instrument cluster provides clear warnings to ensure safe operation and prevent downtime. Understanding these indicators helps maximize the tractor's reliability and performance.
McCormick X4.35 Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Master Warning (Stop) | RED | A critical fault detected, such as low oil pressure or high coolant temperature, requiring immediate engine stop on the X4.35. | Stop the engine immediately and investigate the root cause before restarting. | |
| Master Caution | AMBER | A non-critical fault or system warning that needs attention soon, like a clogged air filter or low fluid level on the X4.35. | Check the cluster for additional warning lights and address the issue at the earliest opportunity. | |
| Check Engine (MIL) | AMBER | An engine management system fault, such as a sensor issue or misfire, specific to the X4.35's electronic engine controls. | Contact your McCormick dealer for diagnostic scan; continued use may reduce performance. | |
| Engine Oil Pressure | RED | Engine oil pressure is below safe operating level, risking severe engine damage on the X4.35. | Stop the engine immediately and check oil level; if full, seek service. | |
| Battery / Charging | RED | The charging system is not providing voltage to the battery, typically due to alternator failure or a loose belt on the X4.35. | Check alternator belt tension and wiring; recharge or replace battery if needed. | |
| Coolant Temperature | RED | Engine coolant temperature is above 110°C, risking overheating and component failure on the X4.35. | Reduce load and allow engine to idle; check coolant level and fan operation. | |
| Transmission Temp | AMBER | The transmission oil temperature is elevated, which can degrade clutch life on the X4.35's power shuttle. | Reduce heavy load or shift to lower gear; allow transmission to cool. | |
| Brake System | RED | A fault in the hydraulic brake circuit, such as low fluid or worn pads, affecting stopping performance on the X4.35. | Check brake fluid reservoir and lines; do not operate until repaired. | |
| Parking Brake | RED | The parking brake is engaged while the tractor is in motion, or a failure in the parking brake system on the X4.35. | Release parking brake fully before driving; if light stays on, inspect switch or brake linkage. | |
| Glow Plug / Preheat | AMBER | The glow plugs are active in cold starting conditions, common on the X4.35's diesel engine below 0°C. | Wait for the light to turn off before cranking the engine. | |
| DPF / Regeneration | AMBER | The diesel particulate filter is clogged and needs active regeneration; this appears on X4.35 models with Stage V emissions. | Drive at higher engine speed (above 1500 rpm) for 20-30 minutes to burn off soot. | |
| Water in Fuel | AMBER | Water has accumulated in the fuel filter/water separator, which can cause injector damage on the X4.35. | Drain the water from the filter bowl immediately to avoid engine performance issues. | |
| Low Fuel | AMBER | Fuel level is below 10% of the tank capacity on the X4.35. | Refuel as soon as possible to avoid air in the fuel system. | |
| High Beam | BLUE | The headlights are set to high beam for improved visibility on the X4.35. | Dim when approaching other vehicles to avoid glare. | |
| Hydraulic System | AMBER | A warning for low hydraulic oil level or overheating in the X4.35's hydraulic system. | Check hydraulic oil level and clean cooler fins; reduce heavy implement use. | |
| Reduced Power (Limp Mode) | AMBER | Engine power is automatically reduced to protect the drivetrain due to a fault, such as high transmission temp on the X4.35. | Stop as soon as safe and investigate the cause; dealer diagnosis recommended. | |
| Air Filter | AMBER | The engine air filter is restricted and requires cleaning or replacement on the X4.35. | Check and service the air filter element to prevent power loss. | |
| Service / Hour Meter | AMBER | Indicates that a scheduled maintenance interval (e.g., oil change) has been reached on the X4.35. | Perform the required service per the operator's manual. | |
| Work Lights | GREEN | The rear or front work lights are turned on for nighttime operation of the X4.35. | N/A – indicator only. | |
| Beacon / Rotating Light | GREEN | The warning beacon is activated, typically for road travel visibility on the X4.35. | N/A – indicator only. | |
| Differential Lock | GREEN | The rear differential lock is engaged to improve traction in slippery conditions on the X4.35. | Disengage when turning to avoid driveline binding. | |
| PTO Engaged | GREEN | The power take-off (PTO) shaft is rotating, either at 540 or 1000 rpm on the X4.35. | Ensure PTO shield is in place and no personnel are near the shaft. |
22 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 thermostat
- Clogged radiator fins
- Defective fan clutch
What to do
Stop the engine and let it cool. Check coolant level in the expansion tank; if low, add premixed coolant. Inspect the radiator for debris and clean with compressed air. If the issue persists on the X4.35, replace the thermostat or fan clutch.
Transmission Overheat
Common causes
- Overloading
- Low transmission oil level
- Clogged cooler
- Excessive clutch slip
What to do
Reduce load immediately; shift to a lower gear. Check transmission oil level on the dipstick (located near the PTO) and top up with recommended oil (e.g., UTTO). Clean the external transmission cooler with a soft brush. Avoid prolonged heavy PTO work.
Hydraulic System Failure
Common causes
- Low hydraulic oil
- Contaminated oil
- Faulty pump
- Leaking hose
What to do
Check hydraulic oil level in the rear sump and fill to the full mark with recommended hydraulic fluid. Replace the return filter if dirty. Inspect hoses for leaks and tighten connections. If the pump is noisy, contact a McCormick technician for the X4.35.
DPF Clog (Stage V Models)
Common causes
- Frequent idling
- Low-load operation
- Poor fuel quality
- Faulty regeneration system
What to do
If the DPF regeneration light is amber, drive the tractor at 1800-2000 rpm with a light load for 20-30 minutes to initiate active regeneration. If the light turns red, stop the engine and call a dealer for a forced regeneration or cleaning. Avoid short trips in the X4.35.
Fuel System Air Leak
Common causes
- Empty fuel tank
- Loose fuel line connections
- Dirty fuel filter
- Worn injection pump seals
What to do
Bleed the fuel system by loosening the bleeder screw on the fuel filter housing and pumping the hand primer until fuel flows without bubbles. Tighten all clamps on low-pressure fuel lines. Replace the fuel filter if it's clogged. For persistent air ingress on the X4.35, inspect the injection pump.
Frequently Asked Questions
Why does my X4.35 show a red oil pressure light after starting?
If the red oil pressure light stays on more than 5 seconds after the engine starts, it indicates low oil pressure. Check the oil level using the dipstick (located on the left side of the engine) and top up with 15W-40 oil. If the level is fine, a faulty oil pressure sensor or oil pump may be the cause and requires dealer inspection.
What does the amber 'water in fuel' light mean on a McCormick X4.35?
This light signals that water has accumulated in the fuel filter/water separator. To resolve, locate the drain valve at the bottom of the filter (under the tractor near the fuel tank) and open it gently to drain water until clean fuel appears. Close the valve and bleed the system if needed.
How do I perform a DPF regeneration on a Stage V X4.35?
When the amber DPF regeneration light appears, take the tractor to an open area, select a transport gear (B or C), and operate at around 1800-2000 rpm with a light drawbar load for 20 minutes. Do not idle or stop the engine during regen. If the light turns red, stop and call your dealer.
My X4.35 has a warning light that looks like a wrench – what is it?
That is the Service / Hour Meter light, which illuminates at preset intervals (e.g., every 500 hours) to remind you of scheduled maintenance. Refer to your operator's manual to see which service is due (e.g., oil change, filter replacement) and perform it promptly.
Why does the transmission temperature warning come on when using a baler?
Heavy PTO work like baling can overheat the transmission oil. Reduce the load by using a lower gear or decrease PTO speed. Check the transmission oil level (dipstick near the gearshift) and ensure the oil cooler (located in front of the radiator) is clean. If the light persists, avoid heavy work until the transmission cools.
What should I do if the brake system warning light stays on?
The red brake system light indicates a fault in the hydraulic brakes. First, check the brake fluid reservoir (under the hood, left side) – top up with DOT 4 brake fluid if low. Inspect brake lines for leaks. If the pedal feels spongy, air may be in the system; bleed the brakes. Do not operate the X4.35 until fixed.