101495-3414/6204731340 Fuel Injection Pump For 4D95LE Engine

Item	Specification
Compatible Engine	4D95LE (50-80kW compact equipment/generators)
OEM Part No.	101495-3414 (Komatsu)
Manufacturer Code	6204731340 (DENSO internal)
Pump Type	Inline A-Type Pump (4 cylinders)
Injection Pressure	13.5 MPa (135 bar)
Weight	8.7 kg (dry)

 

 

1. Compact Design Analysis

[Lightweight Camshaft] → 3 support bearings only

↓

[Short-Stroke Plunger] (Ø7.0mm, stroke 6.8mm)

↓

[Integrated Transfer Pump] (Gear-type, 0.35MPa output)

↓

[Mechanical Governor] (No hydraulic compensation)

Weight Reduction: Aluminum alloy governor housing (vs. cast iron in conventional pumps)

Foolproof Design: Asymmetric fuel port threads (M18x1.5 intake / M16x1.5 return)

2. Critical Performance Parameters

Operating Condition	Fuel Delivery (ml/1000 cycles)	Pressure Requirement
Rated Speed 2600 rpm	42.5±1.0	≥12.0 MPa
Idle 800 rpm	9.8±0.5	≥4.5 MPa
Cold Start	Transient peak 58ml	Cold-start enrichment active

Genuine Part Identification

✅ Authenticity Markers

Housing Cast Marks

Front face: ▲△ triangle symbol (tactile raised surface)

Base: "JAPAN" + production date (e.g., 23 08)

Plunger Finish

Matte dark gray surface (DENSO proprietary ceramic coating)

Laser-etched code on top (requires 10x magnification)

Governor Spring

Free length: 52.3 mm (counterfeits ≤50mm)

Second coil painted green

 

 

 

⚠ Top 3 Failure Modes

1 Transfer Pump Gear Shaft Fracture

Symptom: Normal low-speed operation, power loss at high RPM

Interim Fix: Install external 12V electric lift pump (limit to ≤1800 rpm)

2 Plunger Spring Fatigue

Diagnosis: Free length <50.5mm = failure

Replacement: Must use DENSO 095670-0040 spring (generic parts prohibited)

3 Governor Lever Pin Hole Wear

Symptom: RPM drift ±150 rpm (noticeable at no-load)

Repair Standard: Ream to Φ6.1mm + install bronze bushing

 

 

Arctic Cold Starts (Below -30°C)

Remove cold-start compensator gasket (+20% initial fuel delivery)

Must reinstall after warm-up to prevent black smoke

High-Dust Environments

Retrofit governor breather with oil-mist separator (Model ZF-06)

Clean filter every 500 hours

Biodiesel Operation

Max B20 blend ratio

Flush with mineral diesel for 10 minutes before shutdown

 

 

 

 

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