Bosch 2418455542 Plunger & Barrel Assembly — Restoring Heartbeat To Bosch PS7100 / PES6P120 Pump

On a Euro-2 Scania, the injection pump is the heart of the engine – and the plunger element is the part doing the real work. When that plunger wears, you start to see the symptoms: harder hot starts, uneven idle, a haze of smoke when pulling away, and rising fuel consumption.

The reference 2418455542 (also written 2 418 455 542 or 2455-542) identifies a Bosch plunger & barrel assembly used in Bosch PS7100 / PES6P120-series inline pumps, widely fitted to Scania P94 / D94 / C94 / L94 buses and trucks and to Bosch 0412926025 fuel pump assemblies.

If your pump plate or parts catalog lists 2418455542 / 2 418 455 542 for a Euro-2 Bosch inline pump, this is the core precision component you're looking for.

 

 

Rather than a full pump, this part is the high-precision plunger & barrel pair inside a Bosch inline injection pump:

Component: Plunger & barrel assembly ("pump element")

Bosch number: 2 418 455 542 (= 2418455542) 

Cross reference: 2455-542 (often used in catalog titles and kits)  

Typical pump types: Bosch PS7100 / PES6P120 family, including fuel pump 0412926025  

Typical vehicles: Aftermarket catalogs expressly list SCANIA P 94, D 94, C 94, L 94 BUS platforms using this element. 

So if your inline pump is being rebuilt - not fully replaced - this plunger & barrel is the critical wear part that restores its metering accuracy.

 

 

In a Bosch PS7100 / PES6P120 pump, each cylinder has its own plunger element. Wear here directly affects how the engine feels:

• Delivery volume drift
As the plunger and barrel wear, high-pressure sealing suffers. Delivery per stroke falls, and cylinders stop getting equal fuel. The driver feels this as flat spots, rough idle, and loss of torque under load.

• Return-to-crank problems
Leakage past a worn element makes it harder to build injection pressure at cranking speed. Result: longer hot starts after a short stop in the depot or at the fuel island.

• Dirty exhaust
Poor hydraulic sealing and disturbed spray timing mean more partially burned fuel. That shows up as extra smoke on climb-outs and acceleration, easily noticed on city bus routes.

A fresh 2418455542 plunger & barrel brings the hydraulic sealing and effective stroke back to Bosch design values, allowing the rebuilt pump to deliver factory-spec fuel quantity again.

 

 

On your product page, you can talk about specific benefits instead of vague "high quality" claims:

OE-pattern geometry
Machined to match Bosch 2 418 455 542 dimensions and tolerances, so it drops into PS7100 / PES6P120 assemblies that call up this code.  

Matched plunger–barrel pairing
Each element is lapped as a pair, giving a controlled clearance that maintains injection pressure at truck and bus duty cycles.

Euro-2 calibration focus
Longshine and other diesel specialists advertise this element as a "Bosch EURO 2 pump plunger 2418455542 for 0412926025 fuel pump", underlining its role in Euro-2 Scania applications.  

Rebuild-friendly packaging
Often supplied individually, or in 6-pc sets for 6-cylinder pumps – ideal for full pump overhauls on Scania inline-6 engines

 

 

You can speak directly to the situations your buyers face:

Scania bus or truck pump overhaul
During a full rebuild of a Bosch inline pump on a P94 / D94 / C94 / L94 bus, technicians renew all six plunger elements with 2418455542/2455-542 to bring the pump back to even delivery on each cylinder. 

Euro-2 fleet refresh
Fleet workshops looking to extend the life of Euro-2 vehicles can pair new plungers with fresh nozzles and a re-calibrated governor for a noticeable drop in smoke and fuel use.

Pump repair instead of full replacement
In markets where a complete Bosch pump is expensive or slow to obtain, swapping plunger elements is a cost-effective way to get another service life out of the original housing.

 

 

Because your buyers search for "how-to" as well as part numbers, a short technical block helps:

Disassemble and inspect
Remove the old plunger elements from the PS7100 / PES6P120 pump body; check for scoring, corrosion, or abnormal wear tracks.

Ultra-clean environment
Clean all galleries rigorously. Even small particles can damage a new plunger & barrel set.

Install by position
Fit each 2418455542 / 2 418 455 542 element in accordance with the pump's calibration sheet, keeping original rack and helix orientation.

Re-calibrate on a test bench
After assembly, the pump must be run on a calibration stand to adjust delivery quantity, advance curve and governor settings back to spec.

Refit and verify on vehicle
Once installed, check for easy hot start, smooth idle, reduced smoke and matched EGT between cylinders during a road test.

 

 

Blend a few of these into titles, bullet points and FAQs:

"2418455542 Bosch pump plunger for Scania P94 / D94 bus" 

"2 418 455 542 PS7100 / PES6P120 plunger barrel element 2455-542" 

"Bosch EURO 2 injection pump plunger 2418455542 for 0412926025 fuel pump"  

 

 

 

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