105220-5960 34461-09050 Fuel Feed Pump Assy for Komatsu S4S S4Q S4Q2 6D102 6D95 Engine PC200-6 Excavator Aftermarket Parts

Engineered for Komatsu & Industrial Diesel ApplicationsThe S4S S4Q S4Q2 6D102 fuel injection pump (cross references: 105220-5960 = 34461-09050) delivers reliable fuel pressure for naturally aspirated and turbocharged diesel blocks. This plunger-style pump replaces worn units on forklifts, backhoes, and stationary generators without reprogramming.Specifications- OEM part numbers: 105220-5960 / 34461-09050- Engine fitment: S4S, S4Q, S4Q2, 6D102 series- Operating voltage: 12V DC (solenoid stop)- Plunger diameter: 9mm (standard)- Mounting center distance: 84mm- Inlet thread: M14x1.5- Outlet fitting: 2x M12x1.25 delivery valve holders- Weight: 2.85 kg (6.28 lbs)Product Features- Replacement for 105220-5960 pump with identical housing casting- 34461-09050 cross-match ensures governor spring tension matches OEM- S4S S4Q injection pump includes rack limiter for anti-stall protection- 6D102 fuel pump uses hardened camshaft and roller tappets- All gaskets and O-rings are oil-resistant nitrile rubberInstallation Instructions1. Disconnect battery ground. Remove fuel lines from old pump.2. Mark gear timing: Rotate engine to TDC for 6D102 cylinder #1.3. Unbolt old S4S S4Q2 pump; transfer delivery valve holders if needed.4. Install new 105220-5960 fuel pump; torque mounting nuts to 18-22 lb-ft.5. Connect inlet and return lines. Bleed air via top plug on 34461-09050 pump.6. Run engine at idle; check for external leaks on S4S fuel pump body.Important Notes- Do not use damaged fuel lines with this S4Q injection pump.- Always replace crush washers on banjo bolts for 6D102 installation.- This fuel pump is not compatible with CNG, LNG, or gasoline.- Store 105220-5960 pump in dry area; avoid dropping plunger assembly.- For warranty claims, keep old pump for core comparison.

• [🔥] Precision Fuel Delivery – S4S S4Q fuel injection pump ensures accurate fuel metering for 6D102 engines. Ideal for heavy machinery operators needing stable idle control and reduced exhaust smoke in construction or agricultural settings.
• [🔥] Durable Plunger Assembly – 105220-5960 replacement pump handles high-pressure cycles without leakage. This 6D102 injection pump suits daily use in excavators, loaders, and tractors where vibration and temperature swings are common.
• [🔥] Simple Retrofit Design – Direct bolt-on fit for 34461-09050 systems on S4S and S4Q2 engine blocks. Each S4S S4Q fuel injection pump includes pre-calibrated settings to minimize installation guesswork for shop mechanics.
• [📦] Compact & Sealed Build – 6D102 fuel pump body resists dust and moisture ingress. With standard 12V solenoid operation, S4S S4Q injection pump matches OEM spacing for fuel line connections and mounting brackets.
• [⚠️] Pre-Install Check Required – Compare old 105220-5960 pump flange pattern before mounting. This S4S S4Q2 pump requires clean diesel and a pre-lubed plunger; never run dry. Inspect delivery valve holder torque (25-30 Nm) after first engine start.