Genuine VOLVO Premium Heavy‑Duty Engine Speed Sensor Assembly 20820494
The Genuine VOLVO Premium Heavy‑Duty Engine Speed Sensor Assembly (Part Numbers: 20820494 / VOE20820494 / 22435058), also known as Electromagnetic Inductive RPM Pickup or Crankshaft/Flywheel Position Sensor, is a core powertrain data‑acquisition component for VOLVO D4, D6 and D7 diesel engines. Mounted on flywheel housing or timing gear casing, it generates sine‑wave RPM signals for E‑ECU to control injection timing, fuel quantity, auto‑deceleration and hydraulic pump torque balance. Replacing degraded sensors ensures stable startup, smooth operation and accurate engine calibration.
Core Technical Advantages
High‑Sensitivity Magnetic Core: Neodymium magnet + fine copper winding delivers sharp sine‑wave signals for cold‑start precise RPM detection.
Hermetically Sealed Stainless Steel Probe: Seamless corrosion‑proof steel body resists oil contamination, metal debris, carbon deposits and high‑temperature vapor erosion.
EMI‑Shielded Signal Cable: Integrated shielding foil eliminates alternator/starter electrical interference and signal cross‑talk.
Heat‑Resistant Sealed Connector: Glass‑filled polymer plug with weather‑proof gaskets maintains stable low‑resistance connection under heavy vibration.
Technical Specifications
| Engineering Parameter | Specification |
|---|
| Part Numbers | 20820494 / VOE20820494 / 22435058 |
| Type | Electromagnetic Inductive RPM / Crankshaft Position Sensor |
| Output Signal | Variable‑Frequency Analog Sine‑Wave |
| Housing Material | High‑Tensile Anti‑Magnetic Stainless Steel |
| Ingress Protection | IP69K (High‑Pressure Wash / Oil‑Resistant) |
| Connector Type | Sealed Multi‑Pin Snap‑Lock Blade Socket |
Compatible Machine Models
Compact & Mid‑Size Excavators: EC140C/D, EC160D, EC170D, EC180D, EC200B, EC210B, EC220D/E, EC240B
Heavy‑Duty Excavators: EC250D, EC290B, EC300D
Procurement & Maintenance Guide
B2B Strategy: Engine speed sensors suffer coil degradation, magnetic‑tip debris buildup and signal drift under extreme heat and vibration. Failed units trigger no‑start, power‑reduction limp mode or unstable hydraulic output. Stock 20820494/22435058 for high‑margin emergency engine repairs. Cross‑sell with ECU modules, engine wiring harnesses and fuel injectors for complete powertrain electronic overhauls.
Common Failure Symptoms:
Starter cranks normally but engine fails to start (no RPM signal to E‑ECU).
Random stalling, rough idling or hunting caused by intermittent coil continuity loss at high operating temperature.
Speed‑sensor DTC codes, low‑horsepower limp mode and sluggish hydraulic response due to pump coordination failure.
Installation Notes: Disconnect main battery before replacement. Clean mounting area thoroughly. Lubricate new O‑ring with clean engine oil. Strictly follow factory air‑gap clearance between sensor tip and flywheel gear teeth. Reconnect harness, restore power and verify steady idle RPM signal after startup.
Cross‑Reference & Packing Info
Direct interchange part: 22435058 | Group: Powertrain Management / Crankshaft Position / Flywheel RPM Sensor
Supplier: Xuzhou Sinoswift Import & Export Co., Ltd.
Contact: +86 13701956981 | [email protected]
MOQ: 10pcs | Warranty: 12 months
Note: Genuine‑equivalent aftermarket parts with strict OEM‑matched performance for VOLVO construction machinery.
Disclaimer: All brand names, part numbers and trademarks belong to their respective manufacturers, used for cross‑reference purposes only.
