949979-1420 Crankshaft Sensor Compatible with Machinery

1. Product Overview & Wholesale Price Range

The 949979-1420 Crankshaft Sensor detects crankshaft rotating speed and transmits real-time signal to ECU for construction machinery engine system. It is designed for direct installation.

• Factory Wholesale Price: $18 – $62 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• Component Type: Crankshaft Sensor
• MPN: 949979-1420
• OEM Part Number: 949979-1420
• MOQ & Bulk Discount: 1 Unit (Tiered wholesale discounts available for repair shop & distributor batch orders)
• Lead Time: 1–3 business days (Large factory stock ready for immediate worldwide dispatch)
• Warranty: 12 Months full replacement warranty with speed detection performance test guarantee

2. Application Worksite Checklist

Engineered with high precision sensing chip and dustproof housing, to withstand harsh engine system conditions:

• Crankshaft Speed Monitoring: Real-time detect shaft speed data and feed data to ECU for fuel injection timing adjustment.
• Heavy Earthmoving & Quarry Operations: Sealed housing resists oil mist, dust and vibration under continuous heavy-load operation.
• Long-Hour Mining & Loading Work: Accurate speed reading ensures stable engine power during multi-shift operation.
• Engine System Protection: Reliable speed signal helps ECU optimize fuel supply and protect engine from abnormal combustion.

3. Crankshaft Sensor Troubleshooting & Diagnostic Guide

If your machinery engine system is exhibiting sensor-related failure, consult the diagnostic guide below:

• Fault 1: Engine Power Drop & Weak Acceleration
  Root Cause: Damaged crankshaft sensor — Incorrect shaft speed signal causes improper fuel supply.
  Solution: Replace with new 949979-1420 crankshaft sensor and check connector pins.
• Fault 2: Increased Fuel Consumption
  Root Cause: Inaccurate speed reading leads ECU to inject excessive fuel.
  Solution: Install new 949979-1420 crankshaft sensor and clear engine fault codes.
• Fault 3: Black Smoke Exhaust During Operation
  Root Cause: Wrong speed signal causes air-fuel ratio imbalance.
  Solution: Replace 949979-1420 crankshaft sensor and inspect mounting gap; clear DTC with diagnostic scanner.
• Fault 4: Engine Rough Idle & Unstable RPM
  Root Cause: Fluctuating sensor signal makes ECU adjust fuel supply frequently.
  Solution: Replace the 949979-1420 crankshaft sensor before pursuing expensive engine repairs.
• Fault 5: Sensor Internal Damage from Oil & Vibration
  Root Cause: Long time heavy vibration and oil pollution causes internal chip failure.
  Solution: Replace sensor, clean mounting surface and check for oil leakage.

4. Hot Machinery Replacement Parts Recommendation

Explore our factory-direct replacement components compatible with major global excavator brands:

5. Frequently Asked Questions & Technical Support

Q1: How do I verify if 949979-1420 crankshaft sensor fits my machinery?
A: Check your original sensor shape and connector. Send machine serial number to us for quick fitment check.

Q2: What is the function of this crankshaft sensor?
A: This sensor detects crankshaft rotating speed and transmits real-time speed signal to ECU to adjust fuel injection timing.

Q3: What should I note during sensor installation?
A: Shut down machinery power before replacement, keep clean mounting surface, test engine after installation.

Q4: Is this sensor durable for heavy working condition?
A: It adopts high precision chip and dustproof housing, anti-vibration and oil-resistant design, suitable for long-time heavy load engine system.