Cat 320D Fuel Injection Pump (High?Pressure) – Product Details
Product Overview
The
Cat 320D Fuel Injection Pump (OEM Part Numbers:
326?4635, 320?2512, 10R?7662) is a genuine Caterpillar high?pressure fuel injection pump, purpose?built for
Cat 320D series excavators powered by the C6.4 diesel engine Cat® Parts Store. It precisely meters and delivers high?pressure diesel fuel to the engine injectors, ensuring optimal combustion, power output, fuel efficiency, and compliance with emissions standards in heavy?duty construction applications.
Basic Specifications
| Item |
Details |
| OEM Part Numbers |
326?4635, 320?2512, 10R?7662 (genuine CAT)Cat® Parts Store |
| Brand |
Caterpillar (CAT) |
| Applicable Engine |
Cat C6.4 diesel engine (Cat 320D, 320D L, 320D GC, 323D series excavators)Cat® Parts Store |
| Pump Type |
High?pressure mechanical fuel injection pump |
| Fuel Compatibility |
Ultra?low sulfur diesel (ULSD), standard diesel fuel |
| Operating Pressure |
Factory?calibrated high pressure (meets CAT C6.4 OEM specs) |
| Flow Rate |
Optimized for C6.4 engine fuel demand |
| Housing Material |
High?strength cast alloy with corrosion?resistant coating |
| Internal Components |
Hardened steel plunger, barrel, and control mechanisms |
| Weight |
Approx. 10–12 kg |
| Dimensions |
Length: 15.7 in (40 cm), Height: 6.2 in (16 cm)Cat® Parts Store |
| Condition |
New genuine / CAT?remanufactured (OEM?calibrated) |
| Fit Type |
Direct OEM replacement, bolt?on installation |
| Calibration |
Pre?calibrated at CAT factory; no field adjustment required |
Key Features & Advantages
- Precision Fuel Metering Uses a hardened steel plunger?barrel assembly and rack?and?pinion control to deliver exact fuel volumes per cylinder, matching engine load and speed for maximum efficiency and minimal emissions.
- Heavy?Duty Construction Cast alloy housing and hardened steel internals resist wear, vibration, and corrosion in harsh construction environments, ensuring long service life.
- OEM?Calibrated Performance Factory?set pressure and delivery parameters guarantee seamless integration with the C6.4 engine’s fuel system, eliminating performance issues from aftermarket mismatches.
- Reliable Cold?Start Capability Delivers consistent high?pressure fuel flow even in low temperatures, ensuring reliable engine startup in cold climates.
- Direct Bolt?On Fit CNC?machined to CAT’s exact tolerances, matching the 320D’s engine mounting, fuel lines, and electrical connections for zero?modification installationCat® Parts Store.
- Emissions Compliance Optimized fuel delivery meets global emissions standards (e.g., EPA Tier 3, EU Stage IIIA) for the Cat 320D platform.
- CAT?Backed Quality Genuine CAT or CAT?remanufactured units undergo rigorous testing to ensure durability and performance matching new OEM standards.
Core Working Principle
The pump operates via
reciprocating plunger motion within a precision?machined barrel:
- Intake Stroke: Plunger moves downward, opening fuel inlet ports to draw low?pressure fuel from the transfer pump into the barrel.
- Delivery Stroke: Plunger moves upward, closing inlet ports and pressurizing fuel to high levels, forcing it through the delivery valve to the injectors.
- Fuel Regulation: A control rack rotates the plunger, changing the effective stroke to adjust fuel volume—more rotation increases fuel delivery for high load, less rotation reduces it for idle/light load.
Application Scope
- Cat 320D Series Excavators: 320D, 320D L, 320D GC, 320D FM, 320D RR, 320D LNCat® Parts Store
- Cat 323D Series Excavators: 323D, 323D L, 323D LN, 323D SACat® Parts Store
- Other C6.4?Powered Equipment: Certain Cat skid?steer loaders, compact track loaders, and industrial power units
Packaging & Supply
- Packaging: CAT genuine anti?corrosion, shock?proof packaging with foam inserts
- MOQ: 1 piece
- Shipping Ports: Global CAT distribution centers (e.g., Qingdao China)
- Delivery: Sea freight, air freight, express courier (DHL, FedEx)
- Warranty: CAT standard parts warranty (12 months from installation)
Installation & Maintenance Notes
- Install only by certified CAT technicians following the official Cat 320D service manual.
- Use genuine CAT mounting hardware, fuel lines, and seals to prevent leaks and ensure proper pressure retention.
- Prime the fuel system completely after installation to remove air bubbles; use the Cat 320D’s manual priming pump or electronic priming function.
- Inspect fuel filters regularly; replace them per CAT’s recommended service interval to prevent contamination of the injection pump.
- Avoid using low?quality or contaminated diesel fuel, which can cause premature wear of plunger?barrel components.
- Store the pump in a clean, dry environment if not installed immediately; protect fuel ports from dust and moisture.
Why Choose Genuine Cat 320D Fuel Injection Pump?
- Unmatched Reliability: CAT’s engineering ensures consistent performance in extreme construction conditions.
- Perfect Compatibility: Direct fit with no modifications, minimizing downtime during replacement.
- Long Service Life: Heavy?duty materials and precision manufacturing reduce wear and extend pump life.
- Genuine CAT Warranty: Backed by Caterpillar’s global parts and service network for support.
- Optimal Engine Performance: Preserves the 320D’s power, fuel efficiency, and emissions compliance.
