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C4937363 XCMG GR2605 motor grader speed sensor

Part No.: C4937363 (4937363)
Brand: DCEC Cummins / Genuine Cummins
Type: Magnetic Pickup (Passive, Magneto-Electric)
Thread: M16×1.5
Probe Length: Approx. 25mm
Resistance: 800–1000Ω @ 20℃

Categories: XCMG Mining Graders Spare Parts

Product Details:

C4937363 XCMG GR2605 motor grader speed sensor

Introduction

C4937363 is a magnetic pickup speed sensor (crankshaft position sensor) for Cummins B/QSB series engines. It provides critical RPM and crankshaft position signals to the ECU for injection timing, speed control, and over-speed protection. Non-contact magnetic design, no power required, strong anti-interference, oil & heat resistant.

Technical Parameters

Part No.: C4937363 (4937363)
Brand: DCEC Cummins / Genuine Cummins
Type: Magnetic Pickup (Passive, Magneto-Electric)
Thread: M16×1.5
Probe Length: Approx. 25mm
Resistance: 800–1000Ω @ 20℃
Output: Sine wave pulse, peak 1.5–17V
Air Gap: 0.5–2.5mm to gear teeth
Power Supply: Passive (No external voltage needed)
Temp Range: -40℃ to +125℃
Protection: IP67
Material: Stainless probe, copper coil, metal housing
Connector: 2-pin waterproof
Weight: Approx. 0.18kg
Cross Reference: 3971994, 3967254, 213273

Application

Fit Engine: Cummins 4B3.9, 6BT5.9, ISBE, QSB6.7, 6B5.9
Fit Equipment: Dongfeng Tianlong/Tianjin, Foton Auman; XCMG/LiuGong/XGMA loaders, Sany/ Komatsu/ Hyundai excavators, rollers, pavers, forklifts, mining machines
Mounting: Flywheel housing, timing case, crankcase, facing flywheel/encoder gear
Function: Sends RPM & crank position to ECU; controls injection timing; governs idle & speed limit; drives tachometer

Common Faults & Troubleshooting

1. No Start / No Tach Signal

Cause: Sensor failure, abnormal resistance, open circuit, excessive gap
Fix: Measure resistance (800–1000Ω); check connector; adjust air gap (0.5–2.5mm); replace if no pulse output

2. Erratic Tach, Rough Idle, Poor Acceleration

Cause: Incorrect gap, oil/metal debris, electrical interference, damaged wiring
Fix: Clean probe & gear teeth; reset gap; inspect shielding; replace weak sensor

3. DTC P0321/P0322 (Speed Signal Missing)

Cause: Open/short circuit, faulty sensor, damaged gear
Fix: Test wiring continuity; replace sensor; inspect gear for broken teeth

4. High-Speed Cutting, Power Limitation

Cause: Weak signal, EMI interference, magnet degradation
Fix: Verify output at high RPM; replace sensor; route wiring away from high-voltage cables