0460426520 VE6 Distributor Injection Pump for 0 460 426 520

What we can tell you about this pump is the architecture, and the architecture is unusually informative here. Bosch publishes the 0 460 number block as the distributor pump family, and inside it the sixth digit carries the plunger size and the seventh carries the cylinder count. On 0 460 426 520 that decodes as a 12 mm plunger in a six-cylinder pump, and three independent domains publish that rule the same way. That is a real specification, and it is worth having. What it is not is a fitment, which is why the two things that settle your order are the number on your old pump and the engine code plate — not the family, and not this page.

Why we publish no vehicle list here. This is a deliberate omission rather than missing data. The 426 family covers a large number of machines across several makers, and the trade listings that attach an engine or a vehicle name to numbers in this family contradict each other. We looked, and what we found was family coverage presented as if it were this number’s coverage. We also found no published cross reference and no EAN for this specific number. So rather than reprint a seller’s guess, the page names the pump system, gives you the decoded build, and asks you to send the number and the engine code plate for a written answer. That is a slower answer than a table, and it is the one that does not cost you a pump.

Three more identifiers worth having. If the machine is still with the customer, the serial plate settles the build faster than any chart. If the pump is already off the engine, a photograph of the number on the housing, a photograph of the cast marking on the shoulder, and a photograph of the drive end together are enough for us to confirm in writing. Add the engine code plate and you have removed every assumption from the order. Our buying guides cover the general method for confirming any diesel part from the unit itself.

What this page is not claiming. We are not saying that a neighbouring number in the same family fits your engine, that the full type designation for this number ends in a particular suffix, that a cross reference exists, or that a pump from another family substitutes. 0 460 426 520 describes one build, and the number on your old pump is what identifies it. Anything beyond those lines is better answered from your own parts data, and we would rather answer it with you than assert it here.

A distributor pump is the answer to a question every diesel engine asked: how do you build high pressure once, and then send it to six cylinders in turn? The answer is a rotating head with a single plunger inside it. As the head turns, that one plunger does two jobs at the same time. It slides back and forth against a cam disc, and that motion builds the injection pressure. It rotates with the head, and that motion lines the outlet up with whichever cylinder is next in the firing order. One element, six deliveries per cycle, and a package small enough to sit on the engine where an inline pump with six elements could never fit. That is why the diesel distributor pump ended up on everything from small tractors to marine engines and light trucks.

Three further parts of the pump do work that is invisible from outside, and all three sit inside the housing. A vane transfer pump in the rear half draws fuel in from the tank and raises the internal pressure; that pressure is what fills the pumping element, and it is also what works a piston that rotates the cam disc slightly as engine speed rises, which is how injection timing advances. A control sleeve sets how much fuel the plunger can take in before compression, and a mechanical governor on the pump shaft moves that sleeve to hold the engine speed the operator asked for. On this unit the governor sits visibly on the shoulder as an external assembly, built around a coil spring, a rocker arm and a sliding sleeve — which is convenient, because the easiest part of this pump to photograph and compare is also one of the parts that tells you what it is.

The number carries more information here than on almost any other pump of this kind, and that deserves an explanation in full. Bosch publishes the 0 460 block as the distributor pump family, and the digits within a number are not arbitrary. The sixth digit of the whole number gives the plunger size, where 2 means 12 mm, and the seventh digit gives the cylinder count, where 6 means six cylinders. On 0 460 426 520 that reads as a 12 mm plunger in a six-cylinder pump, and three independent domains publish that decoding rule in identical terms. It is the reason this page can state a plunger diameter and a cylinder configuration for a number that carries no other readable data at all.

That decode does not amount to a fitment, and the distinction is the one that costs money when it gets missed. The 426 family covers a great many machines. Family coverage falls short of this number’s coverage. The trade listings that attach an engine name, a vehicle name or a cross reference to numbers in this family contradict each other, and we found no published cross reference and no EAN for this number at all. So the page gives you the decoded build and the visible hardware, and stops there. The number on your old pump, the shape of the hardware and the engine code plate are what settle the order, and we will confirm all three in writing before anything is invoiced.

One consequence of the single-element layout runs through everything else on this page, and it is the thing a buyer most needs to know before ordering. Because one element feeds every cylinder, wear in that element shows up on all six cylinders together. A worn injector on a common rail system gives you one bad cylinder and a steady engine on the rest; a worn pumping element gives you an engine that is unhappy everywhere at once. That single distinction does more diagnostic work than any fault code name, and it is why a return flow test line by line is the measurement worth taking before you order anything.

A second consequence follows, and it changes what you do at fitting. On this architecture the diesel passing through the pump does the lubricating, so there is no separate oil supply to the pump and no oil to change. That keeps the unit simple, and it makes fuel quality a bigger factor than it would be on a pump with its own oil supply — and it means an internal failure can send wear metal through the tank, the lines and the filter housing along with the low pressure that stopped the engine. A replacement fitted into a circuit that was never flushed can be destroyed inside its first hour. That is why the flush step further down this page is the one that decides whether the new unit lasts.

Our supply differs in what arrives rather than in how the part works. Original equipment supply comes through the manufacturer’s own channels, and a buyer whose paperwork requires a factory boxed part does need to go there. What we supply is a new distributor injection pump — a new compatible unit for the same job, sold under the Vidishi Auto brand, built to the same number, at a single-piece minimum with no core return. That last point matters on this job more than on an old unit pump: nothing has to come back, there is no exchange loop to manage, and the removed pump stays with you for the warranty file.

One thing we do not do is dress that up. The 0460426520 pump we ship belongs to us, not to a manufacturer and not to a vehicle maker. The part numbers and the family name appear on this page so you can match the pump you are replacing; they are references for fitment, not a claim about who made the part, and the cast marking described in the photography is recorded as a marking carried by the photographed goods. Any plate visible in that photography is a reference identification plate, and a country-of-origin line on such a plate describes the plate rather than the place of manufacture of the goods we supply, which is why no country of manufacture is claimed anywhere above. The glossary explains the terminology if any of the names above are unfamiliar.

How we label data. Confirmed means a value read directly from the goods we handle, including the numbers on the housing and the build features visible in the photography. Reference means a family designation, a number block or a decoded value quoted so your paperwork can be matched, and carrying no claim about origin. Not published means the field is left blank on purpose — a cross reference, a fitment list or a figure we cannot source would be worse than an empty cell, because it would end up in somebody’s parts order or somebody’s engine settings.

What is in the box. One complete rotary distributor injection pump: the cast housing with the top cover on its four bolts, the external mechanical governor with its coil spring and rocker arm, the drive ring gear, the drive shaft with its hex retaining nut, the triangular mounting flange, the flat bracket with its three through holes, and the capped outlet unions seated on their copper-coloured sealing washers. The transfer pump, the distributor rotor, the cam disc, the control sleeve and the pumping element are inside the housing and are not separately identified on this page. New sealing washers and a fresh filter element are required at fitting and neither is asserted as included for this line.

One honest note about the photographs. There is a black data plate on one flank of this unit and it carries printed fine print. At the resolution available to us that text cannot be read, so nothing on this page is taken from it. What can be read is the raised marking on the housing shoulder, and that is recorded above as a mark on the goods. The SGS system certification mark on the photography shows the words ISO 9001 and carries no year suffix that we can read, so we record it as a supplier statement about the supplier’s quality system and not as a certificate we issue or as a claim about this individual unit.

Read the table from the top, because the order matters. Used as a 0460426520 cross reference map, it is a boundary as much as a bridge. 0460426520 and 0 460 426 520 are the same identifier written two ways, and a parts system will match one form and not the other, which is worth knowing before a search box tells you the part does not exist. The rows that carry real information are the two decode rows further down, because they tell you what the number means rather than what it is called.

Those two rows are the reason this page can be specific on a pump with no published fitment data. The sixth digit of the Bosch number block is a plunger size code, and 2 is the 12 mm plunger. The seventh digit is a cylinder count code, and 6 is six cylinders. Three independent domains publish that rule identically, and the same rule applied to a four-cylinder sibling number in this batch produces a published four-cylinder designation, which is how we know the rule is being read correctly rather than guessed. This is a decode, and we label it as one: it tells you the build, and it does not tell you what the pump fits.

The Bosch VE6 row is there for identification the way a family name is on any catalogue entry, and it is worth reading with care. It tells you which published pump family this architecture belongs to, which narrows the search and tells a parts clerk what sort of unit to look for on the shelf. It is not a statement that the unit in our box was made by that manufacturer, because it was not, and the difference matters both legally and practically when a warranty claim has to be settled. Our brand page sets out how we handle reference brands across the site and what that does and does not claim.

The last row is the one worth pausing on. There is no cross reference row and no EAN row in this table, and that is not an oversight. No source we can stand behind publishes either one for this number. The 426 family contains many other numbers, and presenting a family member as this pump’s cross reference is exactly how a wrong part reaches a workshop with a confident-looking paperwork trail. Those are the assumptions that turn a cheap order into an expensive week of downtime, and we would rather leave the cell empty than fill it with a guess. Our comparison charts set out the number families we can evidence, and the buying guides cover the general method for confirming any diesel part from the unit itself.

The practical difference shows up on the return flow test. When one line returns clearly more than its neighbours, either the vehicle runs on uneven fuel until something else breaks, or the workshop fits a known-good pump and the readings balance straight away. Keeping a matched spare — correct number, external governor present, drive end correct — turns a two-week vehicle stop into a same-week swap. That is the case for holding one of these before anything has failed, and it is why a single-piece minimum is the sensible purchase here: one pump is one job, and the shelf spare is the one that earns its keep.

• Hard starting that is worse when warm — A pump that takes too long to fill will crank longer as the oil thickens and the fuel warms up, and a distributor pump has one element to fill. A start that is brisk cold and long hot is a signature worth reading properly rather than clearing with more cranking.
• An idle that hunts or will not settle — The mechanical governor moves the metering sleeve to hold a speed, and a sleeve that has worn or a linkage that has lost free movement shows up as an idle that will not hold, often with a shake no mounting fault explains.
• Loss of power only when the engine is worked — When the operator asks for load the pump has to deliver more per stroke, and that is what a tired pumping element struggles to do. The engine feels flat exactly when it is asked for more and fine at idle, which is what makes it easy to misread as a governor setting.
• Smoke under load — Fuel delivered at the quantity the engine asked for rather than the quantity it got will not atomise the way it should, and it leaves the stack as smoke. On this pump that points at the pumping element and the control sleeve rather than only at the injectors.
• Rising fuel consumption — Fuel that spills past a metering sleeve that has drifted is measured again and again, so the gauge moves faster than the work done and the tank empties sooner than the hour meter suggests.
• A return flow test that does not balance — The measurement that settles it. Compare what each delivery line returns at idle against its neighbours. On a distributor pump a single line returning clearly more than the rest points at the pumping element, and no amount of filter or injector work changes that reading.
• Rough running that moves with load — A cam disc worn unevenly, or a rotor and sleeve pair that has worn together, delivers unevenly from stroke to stroke, and the engine says so as a run that changes character as the load changes rather than one that stays steady.
• A fault code on the fuel system side — A fuel system air or vacuum code and an injection pump metering code are both worth reading before you order. Read the data rather than the code name, because a code names a circuit and not always the part. On a mechanical pump also check whether a stop solenoid or a mechanical stop lever is fitted, because the two do different jobs.

The pattern worth holding on to is the one that affects every cylinder together. On a modern common rail system a single worn injector gives you one bad cylinder and a steady engine on the rest. Here, one pumping element feeds all six, so a tired element takes the whole engine down together. That single distinction does more diagnostic work than any code name, and it is why we would rather you bring us a set of return flow readings than a code you have decoded from a list. The fault code guide explains how to read the data behind the code, and our maintenance guide covers the filter and water separator intervals that keep this circuit healthy.

The second pattern is specific to this architecture and worth its own paragraph, because it changes what you do next. Where the diesel itself lubricates the pumping element, a failure can send wear metal through the tank, the lines and the filter housing along with the low pressure that stopped the engine. Fine particles in the filter bowl, or a return line running unusually hot, are the reasons to stop the engine and flush the circuit rather than fit the pump and hand the vehicle back. A replacement fitted into a circuit that was never cleared is a second failure bought on the same day.

• Step 1. Mark the drive position before anything is unbolted
  Before the first bolt moves, mark where the drive shaft sits against the engine and which way the drive ring gear is oriented. This pump is coupled to the engine, and the mark is the only thing that guarantees it goes back on the same position.
• Step 2. Flush the fuel circuit if the old unit failed internally
  A distributor pump is lubricated by the diesel itself, so an internal failure can leave wear metal in the tank, the lines and the filter housing. Drain it all, fit new filters, and only then fit the new unit. This step is the single biggest cause of a second failure and it is the one most often skipped on a pump sold as a drop-in.
• Step 3. Clean the mounting face and the spill port before opening anything
  Wash around the pump, blow the sealing face down, and only then release the bolts. Grit that falls onto that face ends up between the two surfaces and the new pump will weep from its first minute.
• Step 4. Unbolt evenly and support the housing
  Work the bolts in sequence rather than freeing one corner at a time. The housing has to lift straight off the engine, not at an angle, and the drive shaft must never be levered against the coupling.
• Step 5. Inspect the drive shaft, the ring gear and the coupling
  Check the drive shaft, the drive ring gear and the coupling for wear, burrs and stray debris. A drive that has been turning against a worn coupling, or against one that has picked up metal, will damage the new pump inside its first hour of running.
• Step 6. Fit new sealing washers and a fresh filter element
  A fresh washer goes under the refitted pump and the filter element is renewed rather than reused. Reused washers and a reused element are the most common causes of both a weep and an early return of the same fault.
• Step 7. Refit square and torque to the engine figure
  Drop the pump into the marked position, bring the mount up evenly, and torque to the figure for your engine. The figure belongs to the engine, not to the part, and we do not publish it for this number.
• Step 8. Prime, bleed and verify before the engine goes back to work
  Fill and bleed the system properly until it shows no air, then confirm the delivery unions are clean and the caps are off every port. Verify the return flow line by line and confirm a clean cut-off before the vehicle leaves, and check the filter bowl again after the first run.

Two notes on what we deliberately do not print. We do not publish the tightening figure for the mount, the injection pressure figure, the advance curve or the drive phasing, because all four belong to the engine application rather than to the part, and a figure copied from a product page into a workshop manual is how a good pump gets damaged on a correct fit. Take them from the engine manual for the machine in front of you. And we do not publish a diesel fuel injection torque figure as a shortcut, because the mount, the delivery unions and the fuel lines each have their own value and they are not interchangeable. The installation guide covers the surrounding routine, and the glossary defines the terms if any of the above are new to you.

Every 0460426520 pump is covered by a 12-month warranty against manufacturing defects. That covers a unit that arrives out of specification or fails early because of how it was made. It does not cover damage from contaminated fuel, from water in the system, from a filter changed too late, from incorrect fitting, from a drive coupling torqued beyond its figure, or from a separate fault elsewhere in the fuel circuit. It does not extend to labour or to the machine. It is a supplier warranty from Vidishi Auto and it is not a Bosch warranty — we are not a dealer for any of the equipment makers and no cover from any of them travels with this part.

The one condition we ask about every time is whether the circuit was flushed when the old unit came out, because on this architecture that is the single most common reason a replacement pump fails early and the single easiest thing to get wrong on a job where somebody is under time pressure. The diesel lubricates the pumping element, so metal left in the circuit is the mechanism rather than a theory. Tell us what was done and we can tell you quickly whether a claim is likely to stand. If you would rather settle that question before you order, the contact page is the fastest route to a written answer.

The minimum order is 1 piece, and the reasoning is worth stating rather than leaving you to work out. Demand for a pump of this type arrives one fault at a time, because a failure takes a machine off the road and the repair is done once, properly. A single unit covers that job, and it lets one pump sit on the shelf as the known-good unit for return flow testing before anything else is committed. From there the line scales normally — a fleet running several engines will take a set per machine, and a distributor will take them alongside the rest of a fuel system order.

What we do not do on this line is pretend the part is something it is not. The unit we ship is a new compatible replacement sold under the Vidishi Auto brand. It is not Bosch-branded, it is not a factory boxed original and it is not an exchange unit. That matters commercially as well as legally: if your incoming goods inspection needs a specific brand on the paperwork, this is not that product, and we would rather tell you now than have a delivery rejected. The brand page sets out the distinction, and the help centre covers ordering and documentation questions.

The package size and gross weight in that table are a packing estimate, and we label it that way rather than quietly presenting it as a specification. No source we can stand behind publishes a packaged figure for this number, so we give you a figure we can pack and weigh against rather than a manufacturer specification we cannot evidence. If your freight is calculated on volumetric weight rather than actual weight, tell us the destination and we will confirm the chargeable weight against the carton we actually use. The shipping page sets out the full documentation and delivery terms, and the order tracking page is where to follow a shipment once it has left.

On the protective side, the three areas we watch closely are the drive ring gear, the drive shaft nut and the delivery unions. A ring gear knocked out of true will not seat properly on the coupling and will damage the new pump within hours, a shaft nose knocked out of round is a second removal job, and a delivery union left capped and buried in packaging is a leak that shows up on the road rather than in the workshop. All three are packed protected on every unit, and all three are worth checking on arrival before the box goes into stores.

A distributor pump is a small number of large, precisely machined parts, and the ones that matter are hidden once the housing is closed. That is why this line is checked at unit level rather than by sample, and why the checks concentrate on the things a photograph or a torque wrench can settle. Every batch passes an incoming check for the number on the housing, an inspection of the drive ring gear and the drive shaft end, a confirm that the external governor is complete with its spring and rocker arm, a check that the domed cap and its four bolts are sound and that the cap seats, a check that the delivery unions and their sealing washers are clean and free of obstruction, and a packed-weight confirmation against the documented figure.

Rather than publish reviews we cannot verify, we tell you what we will actually put in writing: a written fitment confirmation against the number and the engine code plate you send us, a written quote against your quantity and destination, and a warranty position on any claim that follows. On the certification mark visible in the product photography: it shows the words ISO 9001 and carries no year we can read, so we record it as a statement about the supplier’s quality system rather than as a certificate issued for this unit. If you need a supplier who will sign a specific inspection or conformance document with the order, ask before you buy rather than after, because the answer depends on what the document is. The help centre covers the documentation we can provide, and the partner programme page is the route for a standing arrangement that needs more than a one-off order.

Support is not an add-on on this line — it is how most of these orders get placed correctly. It costs nothing before you buy: send the number read off the unit you are removing, the engine code and the machine details, and we check the whole set against what we supply before quoting. That last item is the one people skip, and on this number it is the one that matters most, because there is no published vehicle list to fall back on. A family description is not a fitment, and a seller’s guess that this number covers a particular machine is not evidence. Two minutes with the old pump in front of you is cheaper than a pump that arrives and does not settle the fault.

Two things we will not do, whatever the order size. We will not quote a fitment we cannot evidence, and we will not print a cross reference that no source publishes. If that costs us an order, it is still the right call: a distributor pump that arrives mismatched costs a workshop a second removal, and that is the failure we exist to prevent. If anything on this page is unclear, the contact page lists every route to us, and a written answer is always better than a guess on a workshop schedule.