Product Overview

This high-quality A Type Plunger (Part Numbers A177 & 131152-4820) is a critical component for the fuel injection system of Komatsu 4D95L engines, commonly used in the PC90 excavator series. Manufactured to strict OE specifications, this plunger and barrel assembly ensures precise fuel metering and reliable engine performance. We serve a global B2B clientele, with regular shipments to North America, Europe, Southeast Asia, the Middle East, and South America, providing a dependable supply chain for your heavy equipment maintenance needs.

Key Features & Benefits

• Precision Engineering: Manufactured from high-grade chrome steel for exceptional wear resistance and long service life.
• Optimal Fuel Economy: Restores proper fuel injection pressure and timing, leading to improved combustion efficiency and reduced fuel consumption.
• Enhanced Engine Performance: Ensures smooth engine operation, reliable starting, and consistent power output for your Komatsu PC90.
• Direct Replacement: Standard size, “A Type” design for a hassle-free, direct fit installation into the fuel injection pump.
• Cost-Effective Solution: A premium aftermarket alternative to the OEM part, offering high quality at a competitive price point.

Technical Specifications

OEM Cross-Reference

This plunger assembly is a direct replacement for the following OEM numbers:

• Komatsu: 131152-4820
• Alternative Number: A177

Compatibility

This component is specifically designed for use in:

• Engine: Komatsu 4D95L
• Vehicle/Equipment: Komatsu PC90 Excavator
• System: Fuel Injection Pump (A Type)

Please verify your existing pump model and part number to ensure correct fitment.

Global Supply & Distribution

We maintain a robust global distribution network to ensure fast and reliable delivery for our B2B partners:

• Worldwide Shipping: We ship to all major international destinations via air, sea, and express couriers (DHL, FedEx, UPS, TNT).
• Major Markets: Our products are regularly exported to North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Japan, Korea, Australia), the Middle East (UAE, Saudi Arabia), and South America (Chile, Peru, Brazil).
• Fast Delivery: Stock items are dispatched within 24-48 hours. We offer efficient logistics to major ports and industrial hubs worldwide.
• Trade Experience: With years of export experience, we handle all international trade documentation and compliance requirements.

Quality Assurance

• Manufacturing Standards: Produced in ISO-certified facilities with strict quality control processes.
• Material Integrity: Made from high-chrome steel that undergoes hardness and durability testing.
• Dimensional Accuracy: Each plunger and barrel is precision-ground and lapped to meet OE tolerances for a perfect seal and consistent fuel delivery.
• Warranty: Backed by a 4-month warranty against manufacturing defects.

FAQ

Q: How do I know this A177 plunger is the correct part for my pump?
A: This is an “A Type” plunger, standard size, used in the injection pump for the Komatsu 4D95L engine. Please confirm your pump’s plunger part number matches 131152-4820 or A177. If you are unsure, measure the diameter and length of your old plunger to verify it matches a standard “A” size.

Q: What is the installation procedure for this plunger and barrel assembly?
A: Installation requires disassembling the fuel injection pump. The plunger and barrel are a matched set and must be installed together. Ensure the working area is exceptionally clean, as any dirt can cause immediate damage. Lubricate with clean diesel fuel or light oil during installation. Due to the precision nature of the component, it is recommended to have the pump calibrated on a test bench by a qualified diesel injection specialist after installation.

Q: What are the signs of a worn plunger that needs replacement?
A: Common symptoms include hard starting, engine misfiring or running rough, reduced power output, increased fuel consumption, and excessive black smoke from the exhaust. A worn plunger cannot maintain the high pressure required for proper fuel atomization, leading to incomplete combustion. If you observe these issues, testing the pump’s delivery pressure is recommended.