D04FR SK140-8 Crankshaft Sensor Compatible with Construction Machinery

1. Product Overview & Wholesale Price Range

The D04FR SK140-8 Crankshaft Sensor collects crankshaft rotation and position signal, feeding real-time rotation data to the engine ECU to control ignition timing for SK140-8 excavator D04FR engine.

• Factory Wholesale Price: $9 – $48 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• Sensor Type: Engine Crankshaft Position Sensor with Long Wiring Harness
• MPN: D04FR-SK140-8-Crankshaft-Sensor
• 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 signal output test guarantee

2. Application Worksite Checklist

Engineered with corrosion-resistant housing and long sealed wiring harness to withstand harsh engine compartment conditions:

• Crankshaft Rotation Monitoring: Provides accurate crankshaft position & speed signal to ECU for timing control.
• Heavy Earthmoving & Quarry Operations: Wear-resistant housing resists oil corrosion, dust and vibration under continuous heavy-load operation.
• Long-Hour Mining & Loading Work: Stable rotation reading prevents engine fault codes during multi-shift operation.
• Engine Timing Control: Reliable position signal helps ECU maintain correct timing and protect engine parts.

3. Crankshaft Sensor Troubleshooting & Diagnostic Guide

If your SK140-8 D04FR excavator engine is exhibiting sensor-related failure, consult the diagnostic guide below:

• Fault 1: No Crankshaft Speed Reading on Dashboard
  Root Cause: Failed or intermittent crankshaft sensor — ECU receives no rotation signal.
  Solution: Replace with new D04FR SK140-8 crankshaft sensor and inspect wiring harness and connector pins.
• Fault 2: Engine Power Loss & Unstable Running
  Root Cause: Incorrect rotation signal makes ECU misjudge engine timing.
  Solution: Install new D04FR SK140-8 crankshaft sensor and check wiring connector.
• Fault 3: ECU Crankshaft Position Related Fault Code
  Root Cause: Open circuit, short circuit or corroded sensor connector.
  Solution: Replace D04FR SK140-8 crankshaft sensor and clean connector terminals; clear DTC with diagnostic scanner.
• Fault 4: Engine Hard To Start or No Start
  Root Cause: Missing crankshaft signal leads ECU to stop fuel supply during cranking.
  Solution: Replace the D04FR SK140-8 crankshaft sensor before pursuing expensive fuel system repairs.
• Fault 5: Wiring Damage from High Vibration
  Root Cause: Long time heavy vibration causes internal wire breakage of long harness.
  Solution: Replace long wire crankshaft sensor, fix wire harness away from high-temperature parts.

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 D04FR SK140-8 crankshaft sensor fits my machine?
A: Check your original sensor shape, wiring length and connector type. Send machine serial number to us for quick fitment check.

Q2: What is the working principle of this crankshaft sensor?
A: This crankshaft sensor detects crankshaft rotating speed and position, converting rotation signal into electrical signals for the engine ECU to control fuel injection timing.

Q3: What should I note during sensor installation?
A: Clean the mounting surface, do not over-tighten the fixing bolt. Protect the long wiring harness from high temperature and friction.

Q4: Does D04FR SK140-8 crankshaft sensor come with installation accessories?
A: Each long wire sensor is ready for direct installation on the engine, matching original mounting dimension and wire length.