Core Specifications
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Part Number: 7W0561 (7W-0561)
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Product Name: Fuel Injection Pump Plunger Element
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Compatible Engine: CAT 3408, 3408B, 3412, 3412C, 3412D Diesel Engine
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Fit Machine: Wheel Tractor Scraper, Bulldozer, Mining Heavy Machinery
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Material: High speed alloy steel
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Process: Heat treatment, precision grinding & lapping
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Feature: High pressure resistance, wear-resistant, low leakage
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Condition: 100% Brand New Aftermarket Plunger
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Warranty: 12 Months
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MOQ: 1 Piece available, bulk wholesale acceptable
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Packing: Neutral separate packaging, custom label & logo acceptable
Key Features
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Micron Precision Lapping: Ultra-fine matched plunger and barrel assembly, minimal internal leakage and stable high pressure output.
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High Wear Resistance: High-speed steel with special heat treatment, resist abrasion from fuel impurities, long service life.
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Strict Quality Control: Every plunger inspected for dimension, sealing and pressure performance before delivery.
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Direct Overhaul Replacement: Same OEM dimension, easy assembly for CAT 3408 /3412 series injection pump repair.
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Improve Engine Combustion: Stable fuel delivery reduces black smoke and optimizes fuel consumption under heavy load.
Solvable Common Faults
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Difficult cold start and long cranking time
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Engine power shortage and weak performance under heavy load
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Black smoke emission and increased fuel consumption
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Unstable idle speed and engine shaking
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Low injection pressure caused by plunger surface wear
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Excessive internal leakage inside fuel injection pump
Why Choose Us
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✅ Professional supplier for CAT 3408 3412 injection pump spare parts
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✅ Strict sealing and pressure inspection for every 7W0561 plunger element
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✅ OEM equivalent precision for heavy machinery pump overhaul
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✅ Support sample order and bulk purchase for repair shop & distributor
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✅ In stock and fast worldwide shipping
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✅ Technical support for pump assembly and bench calibration
FAQ
Q1: What engines does 7W0561 plunger fit? A1: It is designed for CAT 3408,3408B,3412,3412C,3412D engines, widely fitted on wheel scrapers and bulldozers.
Q2: What is the function of pump plunger element? A2: Plunger element is the core part of mechanical injection pump, responsible for building high fuel pressure and controlling fuel delivery quantity.
Q3: Does injection pump need calibration after plunger replacement? A3: Yes, the fuel injection pump must be fully calibrated on test bench after plunger replacement.
