Core Specifications
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Part Number: 1086633 (108-6633)
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Product Name: Fuel Injection Pump Plunger Element
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Compatible Engine: CAT 3304, 3306 Diesel Engine
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Fit Machine: Excavator, Wheel Loader, Bulldozer, Construction Machinery
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Material: High-grade alloy steel
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Process: Heat treatment, precision grinding & lapping
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Feature: High pressure resistance, wear-resistant, low internal leakage
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Condition: 100% Brand New Aftermarket Plunger Element
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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 Matching: Plunger and barrel fine lapped together, tiny clearance, minimal internal leakage and stable high pressure.
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Excellent Wear Resistance: Alloy steel plus special heat treatment, withstand abrasion caused by fuel impurities, extend service life.
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Rigorous Quality Inspection: Each plunger tested for sealing, pressure and dimension before delivery.
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Direct Overhaul Replacement: Same OEM dimension, simple assembly for CAT 3304 / 3306 injection pump repair.
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Optimize Engine Combustion: Stable fuel supply reduces black smoke and improves fuel economy under heavy working 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 3304 3306 injection pump spare parts
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✅ Strict sealing and pressure inspection for every 1086633 plunger element
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✅ OEM equivalent precision for construction 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 1086633 plunger fit? A1: It is designed for CAT 3304 and 3306 diesel engines for excavators, loaders and bulldozers.
Q2: What is plunger element used for? A2: Plunger element is the core component of mechanical injection pump, it builds high fuel pressure and controls fuel delivery volume.
Q3: Is bench calibration needed after replacing plunger? A3: Yes, injection pump must be fully calibrated on test bench after plunger replacement.
