What Is the Bosch 0440020036 Fuel Pump?
The Bosch 0440020036 fuel pump is a mechanically driven, gear-type fuel supply pump — also called a feed pump or transfer pump — fitted to Mack E6, E7 and E-Tech truck engines from 1997 to 2006, and to Volvo applications carrying part number 21089217. If that ten-digit number is on your old pump’s tag or on your invoice, it is the number to order by. Its job is low-pressure fuel delivery: it pulls diesel from the tank and keeps the injection system fed. It does not generate injection pressure itself.
That distinction matters. A buyer chasing a no-start on a Mack E7 sometimes orders a high-pressure injection pump when the fault is actually the supply pump starving it. This guide tells you what the 0440020036 is, which engines and years it belongs to, how to read the thirty-plus numbers that all point to this one pump, and what to demand from a supplier before it ships.
What the 0440020036 Actually Is
| Attribute | Detail |
|---|---|
| Operating mode | Mechanical, engine-driven — not an electronically controlled high-pressure pump |
| Pump type | Gear pump; fuel supply / feed / transfer pump |
| Fuel | Diesel |
| Bosch type code | FP/ZP6VH/L1S |
| Typical contents | Gear, gasket, hand primer (contents vary by supplier — confirm before ordering) |
| Weight | Approximately 3.08 lb (1.4 kg) |
| EAN | 3165143338049 |
| Also offered as | PAI ESP-3583 / ESP-3583OEM / EM35830, and other aftermarket references below |
| Flow rate, pressure rating, housing material | Not published in the catalogs we checked — ask your supplier for the bench test data rather than accepting a generic figure |
A gear-type supply pump is a simple, tough unit: two meshed gears move a fixed volume of fuel each revolution. When the gears or the housing bore wear, the pump loses its ability to hold supply pressure — especially at idle and low engine speed. A hand primer that will not build pressure, or air entering on the suction side, produces much the same symptom without any internal wear at all.
Fitment: Engines, Years and Vehicles
Public parts catalogs consistently place the 0440020036 on Mack trucks. Here is what they agree on:
| Make / engine | Years / application | Associated OE numbers |
|---|---|---|
| Mack E6 | 1997–2006 range quoted by suppliers | Mack 322GC38 / 322GC42 / 322GC43 / 322GC45 / 322GC49A |
| Mack E7 | 1997–2006 | Same Mack 322GC / 332GC group |
| Mack E-Tech series | E-Tech fuel supply pump applications | PAI ESP-3583, Mack 322GC49A |
| Volvo | Cross-referenced applications | Volvo 21089217 |
See the exact unit on our Bosch 0440020036 fuel pump product page for the identification details and what ships with the pump.
One honest caveat: fitment lists on public catalogs are copied between suppliers and can carry transcription errors. Before a large order, confirm against the truck’s VIN, engine model and year, and the number on your old pump’s tag. Send us those three details and we check them before quoting — no cost, no obligation.
Cross Reference Numbers for 0440020036
One physical pump can legitimately appear under all of the numbers below. Group them by system and the apparent chaos disappears:
| System | Numbers |
|---|---|
| Bosch | 0 440 020 036 / 0440020036 (primary); 0 440 020 001 / 0440020001; 0 440 020 006 / 0440020006; F 00E 200 429 / F00E200429; FP/ZP6VH/L1S |
| Mack | 322GC38, 322GC38M, 322GC41, 322GC42, 322GC43, 322GC45, 322GC49, 322GC49A, 332GC45, 31089217, 21051407, 25100075, 85013282, 21089317, 25099005 |
| Volvo | 21089217 |
| PAI / other | ESP-3583, ESP-3583OEM, EM35830, 935-0440020001, 935-0440020036, 9350440020001, 9350440020036, MAK322GC49A, 0-440-020-036, 440020036, 9008FP |
Roughly thirty-five numbers across four systems, all describing the same supply pump family. The practical rule: whichever one is stamped on your old unit, verify it against your engine model and year before ordering. A number that maps to a different pump on a different engine family is the most common cause of a wrong shipment.
How to Confirm 0440020036 Before Ordering
- Photograph the identification tag. Clean the plaque on the pump housing and capture the full ten-digit number plus any prefixes. A casting number stamped into the housing is not the orderable part number.
- Record engine model and year. E6, E7 or E-Tech, plus the truck’s model year. Suppliers quote 1997–2006 for the E7 application; a truck outside that window needs a second look.
- Note the VIN and any Volvo reference. If your paperwork says 21089217, that is the Volvo-side number for this pump family.
- Check ports, drive and mounts. Inlet and outlet positions, the mechanical drive coupling and the mounting flange must match the old unit. Ask for a photo of the actual pump, not a catalog render.
- Confirm what is in the box. Gear, gasket and hand primer are commonly included, but contents vary. Get the list in writing before payment.
Send it in one message: the 0440020036 number, engine model, truck year, VIN and a photo of the old pump’s tag → inquiry form or email sales@atospumps.com. Fitment confirmation and quotation within 24 hours.
Symptoms of a Failing Supply Pump
Low-pressure supply faults overlap with cheaper problems, so rule out filters, air leaks and fuel quality before condemning the pump:
- Hard starting after the truck sits. Fuel drains back toward the tank and the pump struggles to re-prime. A hand primer that goes soft again points at the suction side or the pump’s internal check valve.
- Loss of power under load. The injection system is not being fed enough fuel at demand.
- Stalling, surging or unstable idle. Often air entering the supply line, sometimes worn gears losing their seal at low speed.
- Fuel leaks at the pump or fittings. A weeping gasket or loose line lets air in on the suction side — the same symptom as a worn pump.
- Metal particles or heavy sludge in the filter. Cut the filter open. Contamination tells you what the pump has been swallowing, and debris can travel into the injection system.
And keep the diagnosis honest: a restricted filter, a cracked suction line, a bad lift pump on a different part of the circuit, or injector faults can all look like a failing supply pump. Check the cheap things first — a ten-minute inspection beats a wrong order every time.
What to Check Before Ordering
- 100% bench testing. Every pump pressure-tested and leak-checked before packing, with test data available on request — not just a sampled batch.
- Gear machining quality. Precision-cut gears with tight housing clearances hold supply pressure at low engine speed; sloppy gears lose it as the pump warms up.
- New seals, gasket and hand primer. Reused sealing surfaces cause the air leaks that bring pumps back.
- Part number matched to your engine and year. The supplier should confirm against those, not just against a number typed into an order form.
- Export-grade packing. Precision-machined internals do not enjoy rough freight — confirm wooden case or reinforced packing for sea shipments.
- Written warranty. Coverage and the claim process in writing before payment, not after.
What to Include in Your Inquiry
A short, complete inquiry gets a fast, accurate answer; a vague one turns into five emails and a week of downtime. Copy this checklist into your message: the full part number (0440020036), a clear photo of the identification tag, engine model (E6, E7 or E-Tech), truck year and VIN, the quantity you need, and your destination port or country. If the truck is already off the road, say so — it changes the shipping method we recommend. We reply with fitment confirmation, a quotation and a realistic delivery schedule within 24 hours, and we will tell you plainly if the number in your hand does not match your engine.
One more thing worth asking any supplier: what happens if the pump arrives and does not fit? A clear answer about returns, replacements and technical support before payment tells you more about a supplier than any product photo. Fleet buyers and repair shops should also ask about mixed-part consolidation — combining several numbers in one shipment usually beats paying freight on a single pump twice.
Frequently Asked Questions
How do I confirm 0440020036 fits my truck?
Send the engine model (E6, E7 or E-Tech), model year, VIN and a clear photo of the old pump’s identification tag. We check the number against the engine and year before quoting, at no cost. Public fitment lists are useful guides, not a substitute for the truck’s own data.
Is this a high-pressure injection pump?
No. The 0440020036 is a mechanically driven, gear-type low-pressure fuel supply pump — it feeds the injection system rather than creating injection pressure. If your diagnostic points at injection or rail pressure, the fault may sit elsewhere in the fuel system. Tell us the symptoms with the tag photo and we help you sort it out.
Why does one pump have so many numbers?
Bosch production and superseded numbers, Mack and Volvo OE numbers, PAI aftermarket references and plain catalog formatting variants all describe the same pump family. The cross reference table above groups them in one place. Photograph the tag and verify against your engine and year — then any of those numbers works.
Can I order a single pump?
Yes — single-unit orders are routine for repair shops. Distributors stocking a fuel-system line can ask about mixed-part consolidation to fill one shipment with a range of numbers instead of a full carton of one.
Get the 0440020036 Pump Confirmed in 24 Hours
Every mismatched fuel pump is a truck off the road twice: once for the failure and once for the correction. Send your 0440020036 number, engine model, truck year, tag photo and destination port, and you get fitment confirmation plus a quotation within 24 hours — before anything ships.
- Request a quote: inquiry form · Email sales@atospumps.com
- View the Bosch 0440020036 fuel pump product page
- Browse the full range on our fuel pump category page
- Sourcing other pump types? See the full range on our products page
Written by the engineering team at AtosPumps — manufacturing replacement pumps and exporting to 30+ countries for over 20 years, including the USA, Mexico, Brazil, Argentina, Chile, Peru, Colombia, Morocco, Algeria, UAE, Saudi Arabia, Oman and South Africa. Every pump is 100% tested before packing and covered by a written warranty.
