332X1021R Exchange Unit Pump for GE 12V250 Locomotive Diesel
New 332X1021R exchange unit pump (Bosch EUP) for GE 12V250 / GEVO-12 locomotive diesels. A Vidishi Auto compatible replacement, new, 12-month warranty. Single package 30x21x10 cm, 7.0 kg gross. MOQ 4 pcs. Wholesale export supply.
Original price was: $2,460.00.$1,760.00Current price is: $1,760.00.
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Product Specifications
| Weight | 7.0 kg |
|---|---|
| Dimensions | 30 × 21 × 10 cm |
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| model | |
| engine | |
| position |
Product Details
332X1021R by the Numbers
Verified identity and fitment data for the complete diesel unit pump, supplied new for the GE 12V250 locomotive engine.
Every item in this listing is a complete diesel unit pump of the electronic kind: one sealed pump-nozzle body rather than a bare nozzle or a service kit, built to the Bosch F00BL0P047 specification, which is why the family carries the Bosch EUP name. The electronic unit pump element works in the camshaft-driven sense — the roller tappet rides the engine cam, the plunger pressurises fuel inside the element, and the solenoid spill valve times the delivery — so the assembly behaves as an EUP unit pump on the bench and in the engine alike. Buyers reach it by several routes: some search an exchange unit pump by the number on an old depot label, some bring the interchange 705503AT off a parts drawing, and most simply read the code off the body. Trade paperwork for the 332X1021RBS form shows why the family carries an exchange identity at all. On the OEM unit pump core charge scheme a depot hands back the spent element before the replacement is released; the assembly described here is bought outright, with nothing to send back and no exchange account to hold.
Engine Compatibility for 332X1021R
A unit pump for the GE 12V250: this assembly runs the twelve-cylinder GEVO-12 traction diesel and its six and eight-cylinder sisters, one pump element per cylinder, camshaft driven.
| Engine form | Layout | Typical machine | Listing form |
|---|---|---|---|
| GE 12V250 unit pump | Camshaft-driven EUP, one element per cylinder, V12 | GE 12V250 / GEVO-12 traction diesels | 332X1021R |
| EVO T2 unit pump | Evolution Series Tier 2 emissions rating | EVO T2 freight and passenger locomotives | 332X1021R |
| 12V250 rail unit pump | 250 mm bore, 320 mm stroke, twelve cylinders | Rail traction and stationary builds of the 250 family | 332X1021R |
| EVO T2 diesel unit pump | Pump-nozzle integrated, solenoid spill control | EVO T2 depot overhaul programmes | 332X1021R |
| Wabtec exchange unit pump | OEM unit-exchange register form | Exchange shipments handled by Wabtec | 332X1021RBS |
| GEVO-12 unit pump exchange | Twelve-cylinder GEVO build, exchange cycle | Exchange programmes on GEVO-12 fleets | 332X1021RBS |
Bosch partsReference brand range
Vidishi AutoCompatible brand range
Installation guidesFitting walk-throughs
Maintenance guidesService reference
Engine diagnosisSymptom triage
Fault codesCode reference hub
Wholesale programmeB2B supply
Most buyers arrive with a single number alone, so the whole platform sits on one page. Send the nameplate and we confirm the GE 12V250 fitment before you order; the same reference doubles as a depot guide for units coming off a twelve-cylinder locomotive. Interchange numbers seen across independent sources: 705503AT / F00BL0P047 / 332X1021 / 84E901259G5.
Fitment verification
- Engine code plate — the plate on the block must read the 12V250 / GEVO-12 build, not another Evolution series rating.
- Old pump nameplate — the number and the serial line are read straight off the body so we match the unit, not just the engine.
- Flange and connector photo — the mounting face and the solenoid connector show which build revision the assembly belongs to.
About the 332X1021R Assembly
What a pump-nozzle unit is, how the exchange numbering works, and where the assembly sits in the GE 12V250 fuel system.
What is a unit pump?
A unit pump is a single-cylinder, camshaft-driven high-pressure element that both pressurises and times the fuel for one cylinder. The 332X1021R covers a complete unit of that kind in the Bosch EUP family: one body holding the plunger element, the spill control and the delivery nozzle, so nothing is left for the engine to meter separately.
How does a unit pump work?
The engine camshaft lifts the roller tappet, the plunger compresses the fuel trapped in the element, and the solenoid spill valve opens at the moment the ECU chooses so the pressurised fuel goes to the delivery nozzle instead of back to the gallery. On a GE 12V250 there are twelve of these elements, one per cylinder, and the ECU trims each individually. A tired element shows a weak delivery or a seeping seat long before the engine becomes impossible to start.
Electronic unit pump explained
The principle is simple: a mechanical element with an electronic spill valve bolted to it, where the cam does the work and the ECU does the timing. Put beside a rail-fed injector, the difference comes down to where the pressure is made — in the individual element here, versus in a pump feeding a shared gallery. Both are high-pressure diesel injection, but the hardware, the leak-down behaviour and the bench checks all differ, so the two are never interchangeable.
Unit pump exchange number explained
Large fleets rarely buy this family one piece at a time. The manufacturer runs a unit-exchange scheme: the depot orders a replacement, hands back the spent element, and the core charge is settled against the return. That is where the exchange register identity of this family comes from — numbers like 332X1021R and the refurbished-trade form 332X1021RBS travel on the paperwork of that cycle, while the Bosch catalogue and GE drawing numbers travel on the parts book.
Unit pump service exchange explained
A service exchange keeps a fleet moving because a rebuilt unit arrives quickly, but it ties the buyer to the OEM channel: a core to hand back, inspection charges if the returned element is not accepted, and lead times governed by the exchange pool. This listing describes the outright route instead — a new assembly bought and kept, no core to return, and the same interchange numbers used to confirm the match. Buyers who need the exchange cycle use the numbers here to identify their old unit; buyers who want to own the replacement outright order it directly from this page.
Inside this assembly sits its own delivery element and nozzle in one sealed body, which is why no separate internal component number is published for this part number. The unit is built to the Bosch F00BL0P047 specification, carries a 12-month warranty, and is supplied new under the Vidishi Auto brand as a compatible replacement.
Technical Specifications
Verified parameters for this high pressure unit pump, graded at the EUP platform level. Items the manufacturer does not publish are flagged, not guessed.
- Confirmed — multi-source verified fact
- Reference — interchange or class-level value; cross-check before relying on it
- Not published — the manufacturer does not publish it, and we never invent a number to fill the gap
| Parameter | Value | Data tier |
|---|---|---|
| Reference Part Number | 332X1021R — exchange register form | Confirmed |
| Interchange number | 705503AT — listed beside the exchange number across independent sources | Confirmed |
| Refurbished-trade form | 332X1021RBS — recorded on exchange shipment documents | Reference |
| Bosch catalogue form | F00BL0P047, dotted nameplate version F00B.L0P.047 — declarative reference | Reference |
| GE reference | 332X1021 — GE host number, interchange only | Confirmed |
| GE PT reference | 84E901259G5 — GE PT number, interchange only | Confirmed |
| Bosch side reference | B416810387 — listed beside the family on independent sources | Reference |
| Product family | Bosch EUP | Confirmed |
| Bosch unit pump specification | Built to the Bosch F00BL0P047 specification, EUP high-pressure class | Reference |
| Injection system | 12V250 fuel injection system, one element per cylinder | Confirmed |
| Pump type | Pump-nozzle integrated, solenoid-actuated spill control | Confirmed |
| Unit pump solenoid spill valve | Solenoid spill valve controlling delivery timing, part of the sealed assembly | Confirmed |
| High pressure unit pump class | 1,800 bar maximum system pressure at EUP platform level (Bosch published platform figure) | Reference |
| Engine output per cylinder | Up to 450 kW at EUP platform level (Bosch published platform figure) | Reference |
| Service life class | 20,000 hours at EUP platform level (Bosch published platform figure) | Reference |
| Supplied brand | Vidishi Auto — new compatible replacement, not Bosch-branded | Confirmed |
| Application engine | GE 12V250 / GEVO-12 diesel locomotive engine | Confirmed |
| Condition | New | Confirmed |
| 12-month warranty | Cover against manufacturing defects | Confirmed |
| Single package size | 30 × 21 × 10 cm | Confirmed |
| Packaged shipping weight | 7.0 kg per unit — packaging and transport weight | Confirmed |
| Internal component numbers (control valve, plunger, nozzle) | Not published against this part number — no number is stated rather than a borrowed one | Not published |
| Net weight (single assembly) | Not published by the manufacturer — only the packaged shipping weight above is stated | Not published |
| Maximum injection pressure value | Not published by the manufacturer | Not published |
| Flow rate (per element) | Not published by the manufacturer | Not published |
| Coil resistance (ohm) | Not published by the manufacturer | Not published |
| Per-unit opening pressure | Not published by the manufacturer | Not published |
Identification: part number location
The exchange number travels on the depot label and the shipment paperwork, the catalogue number F00BL0P047 with its dotted form F00B.L0P.047 sits on the solenoid-cover nameplate beside the serial and the GE references, and the mounting flange and connector confirm the build revision. Reading that nameplate against these lines is the quickest way to settle a match before ordering.
Reference figures come from the 332X1021R exchange and 332X1021RBS refurbished-trade document trail together with the locomotive-side 332X1021 and 84E901259G5 component evidence; the platform pressure, output and service-life figures are Bosch published class values for the EUP range, not a calibration for this individual part. Net weight is left as not published because no source ties a figure to this part number, so only the packaged shipping weight of 7.0 kg is stated. Flow rate, coil resistance and opening pressure are quoted only after a bench test. This assembly is a pump-nozzle integrated unit, so no internal component of it carries a number we can bind to the listing, and none is printed here.
Cross-Reference & Interchanges
Need a 332X1021R cross reference or a 332X1021R equivalent? The numbers below are the ones buyers match against. All are reference interchanges only.
These references are printed so the right pump can be matched, not to claim an origin. The Bosch catalogue number and the GE drawing numbers identify the same physical element across parts books, while the exchange and refurbished-trade forms travel on the service paperwork of the same family. We list only the numbers we can corroborate across independent sources. The internal control valve, plunger and delivery nozzle of this assembly carry no number that any independent source binds to the listing, so we state none at all rather than a borrowed one. Send the nameplate photo and we confirm the interchange set against your build on the same RFQ.
Key Features
Why this EUP assembly is built for locomotive service, and what the exchange identity means for the way you buy it.
Camshaft driven unit pump
Each cylinder carries its own cam-actuated element, so pressure is generated in the element rather than in a shared gallery.
No core return unit pump
Bought outright and kept: nothing to hand back, no depot core account to open and no exchange paperwork to track.
Unit exchange program, outside it
The OEM scheme hands back a rebuilt unit against your spent element. This listing supplies a new assembly instead, so the cycle never starts.
Unit pump core exchange, avoided
No core charge to settle and no inspection dispute over the returned element — the price quoted is the price invoiced.
Unit pump exchange alternative
A practical route for buyers who cannot wait on an exchange pool: identify the old unit by its exchange number, order the new one outright.
Complete assembly, not a part
What you receive is the whole pump-nozzle body — a complete unit, not an internal component of one.
No invented numbers
Where an internal number is not published against this revision, we say so rather than filling the gap.
New and warranted
Supplied new with a 12-month warranty against manufacturing defects, handled against the batch number.
Failure Symptoms
Unit pump symptoms to watch for on a GE 12V250, and the checks that separate a tired element from a healthy one.
| Symptom | What it usually means |
|---|---|
| Unit pump symptoms | A weak or seeping element drops combustion quality on one cylinder and shows up first as uneven exhaust temperature. |
| 12V250 unit pump low power | Delivery falling below the class figure on one or more elements pulls the whole engine rating down under load. |
| 12V250 unit pump hard starting | Low cranking delivery on one element or a leaking spill seat delays the first firing. |
| EVO T2 engine smoke unit pump | Poor atomisation from a worn delivery nozzle raises exhaust opacity on an EVO T2 rated build. |
| Diesel unit pump rough running | Uneven delivery between elements shows as a lope or beat at idle and light load. |
| Unit pump cylinder imbalance | One element drifting out of step with its neighbours changes exhaust temperature spread and fuel burn. |
| EUP diagnostic trouble code | An ECU cylinder-balance or circuit code points at one element for a bench check. |
| Unit pump return flow test | A return-flow reading against the EUP class separates a tired element from a healthy one. |
Two measurements do most of the work: a return-flow reading against the EUP class, and a bench spray and seat-leak check. Recognising these signs early keeps a unit out of a line failure. The root cause is rarely the pump alone — contamination past the filter, a worn tappet face and long service hours all repeat the same damage, so fix the cause as well as the assembly.
How to replace unit pump on a GE 12V250
A bench-side walk-through of fitting for the 332X1021R, from a single-element change a depot can do in the shed to a full bench test.
Confirm the code
Match the exchange number 332X1021R, the interchange 705503AT and the engine plate before a spanner moves.
Isolate the fuel and the battery
Shut off the fuel supply, relieve pressure in the element supply line and isolate the battery before opening the high-pressure connections.
EVO T2 unit pump removal
Unbolt the old assembly on the EVO T2 build, note the flange orientation, and check the tappet bore and the mounting face for scoring or debris.
12V250 unit pump replacement
Offer the new assembly in with a fresh sealing washer and a clean flange face before the fasteners are started.
Unit pump installation torque
Seat the assembly to the torque figure given in the engine manual, working evenly across the flange.
Unit pump timing
Roll the engine to the timing mark before the element is clamped home. The setting is fixed by the cam position, so being one tooth out will show as a rough cylinder.
Check the flange and connector
Confirm the bolt pattern and connector keyway against the old body before you commit to the change.
Unit pump priming
Bleed the supply line and crank without firing until the element is fully bled, then check for weeping at every joint.
Unit pump cylinder balance
After the first start, run a balance check on the exhaust temperatures and trim as the ECU allows before sending the unit back into service.
Fit a fresh sealing washer every time, work to the torque figure, and prime before the first start. The seal and the timing position are the two steps workshops most often rush. A single-element change on a 12V250 uses the same procedure as a full set — change the worn element, not all twelve.
Warranty & Support
Every 332X1021R assembly is covered against manufacturing defects, handled against the batch number on the box.
Manufacturing defects are covered from the ship date, and claims are handled against the batch number recorded on the box.
Every assembly ships with these terms in writing on the packing list that travels with the consignment.
Contaminated fuel, water in the system, incorrect fitting, or a root fault elsewhere in the fuel system.
To open a claim, send the batch number and the bench report; the full procedure sits on the Warranty Policy page.
Wholesale & Bulk Supply
As a 12V250 unit pump supplier we ship to depots, rebuilders, fleets and importers worldwide. Send a unit pump RFQ with your quantity and destination port and we return a wholesale unit pump figure, from a single element to a unit pump bulk order.
A floor of 4 pcs lets a depot trial the assembly first, and volume tiers are quoted on the same RFQ.
Outright new stock replaces the exchange cycle for bulk programmes, drawn from one production run so per-cylinder output stays consistent across a V12.
A consolidated shipment moves on one packing list and a single tracking reference.
Supply for depot overhaul programmes and outright fleet stock, quoted per order rather than off a list.
We provide the invoice, packing list and documentation with every consignment.
A dedicated channel for overseas fleets, with freight quoted by mode and destination.
Shipping & Packing
Export packing and freight for single boxes through container volumes, quoted per order.
Express courier or air for single boxes and small batches, sea freight for container volumes, all with tracking. Unit pump shipping is booked on the same RFQ as the goods.
Each assembly ships in a 30 × 21 × 10 cm export box at 7.0 kg gross, foam-lined to protect the flange and connector. 12V250 pump export packing is built for a long sea leg.
The commercial invoice, packing list and full export paperwork travel with every consignment, together with a tracking reference.
Buyer Feedback
Field notes from depots and fleets running the 332X1021R on GE 12V250 power.
Matched the exchange number on our depot labels and the nameplate on the old units; even exhaust temperatures after a cylinder-balance check. A new outright part with nothing to send back — exactly what we needed.
One element replaced a tired pump on a twelve-cylinder unit; hard start cleared and smoke dropped. Fast RFQ turnaround and the box arrived intact.
Frequently Asked
Common questions about the 332X1021R exchange listing and ordering a compatible replacement.
Is 332X1021R genuine Bosch?
332X1021R unit pump – what does it cover?
What does the 332X1021R exchange number actually mean?
Which engines does the 332X1021R application cover?
Can you run a 332X1021R fitment check before I order?
What do the 332X1021R cross references cover?
332X1021R pressure rating – what class is it?
332X1021R warranty terms – what is covered?
332X1021R minimum order quantity – how low can the first order be?
Does the assembly come with its nozzle?
How do I check the 332X1021R against the pump coming off my engine?
332X1021R lead time and freight – how is it quoted?
Need Help Matching?
Send the engine plate and the old nameplate photo; we confirm the 332X1021R match before you pay.
Instant fitment check — wa.me/8613509025030
Formal quote — [email protected]
Warranty Policy — cover, claims and exclusions for the 332X1021R.
Contact us — or read the FAQ and Shipping Information pages.
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