Speed Sender 266-8577 for CAT 988H 992G Loader 834H 854G Wheel Dozer – RPM Tachometer Pickup

OE Number: 266-8577Compatibility: CAT 988H, 992G Loaders; 834H, 854G Wheel DozersEngines: C18, C27, C32 Industrial DieselType: Passive Magnetic Speed Pickup (Variable Reluctance)Output: AC Voltage Pulse (amplitude increases with RPM)Mounting: Flanged base with M6 boltsAir Gap: 0.5–1.0 mm (matches OEM spec)Operating Temperature: -40°C to +125°CBody Material: Stainless steel with IP67-rated connector

• Aftermarket speed sender (OE 266-8577) for Caterpillar 988H and 992G wheel loaders, 834H and 854G wheel dozers — monitors engine or transmission output shaft speed via gear teeth to drive analog tachometer gauges in C18, C27, and C32 industrial diesel engines.
• This is a passive magnetic pickup (variable reluctance type), not a powered digital sensor. It generates an AC voltage pulse as gears rotate — providing a direct signal to mechanical or analog tachometers without ECU involvement, software, or emission system linkage.
• Sealed stainless steel housing with rugged connector resists extreme heat, vibration, oil, and dust in demanding mining, quarrying, and heavy earthmoving applications across North America.
• Direct OEM-fit replacement with identical mounting flange, air gap tolerance, and electrical output profile. Install in minutes using standard tools — no calibration or wiring changes required.
• ⚠️ For off-road Caterpillar construction and mining equipment only. Not approved for on-highway vehicles, agricultural tractors, marine engines, irrigation systems, pesticide sprayers, or refrigeration units.