Description

Mercedes-benz OM470LA, OM471LA Repair Manual

If you are wrenching on a CLAAS harvester or any equipment packing an OM470LA or OM471LA, you know these engines are not something to guess on. I have seen guys snap cylinder head bolts because they grabbed a generic torque chart off some forum. That is a full day of rework. The Mercedes-benz OM470LA, OM471LA Repair Manual is the factory document – 504 pages of what the engineers wrote, not what some third-party editor thought was close enough. Every torque value, every clearance, every wiring path comes straight from Stuttgart.

Mercedes-benz OM470LA, OM471LA Engine Data

Section 0102 breaks down the complete component information for both the OM470LA and OM471LA. You get the type design, ignition order, sensor and actuator locations. The manual lists engine data for each variant, including displacement, firing order, and crankshaft rotation direction. If you are swapping a long block or just needing to verify injection timing, this is the page you turn to.

What Torque Values Are Listed?

The torque settings chapter covers metric standard threads, metric fine threads, and a long list of hydraulic fittings – ferrule, sealing cone, SDS male connectors, swivel fittings, hollow screws, brake line fittings, and worm drive hose clamps. All values are in Nm. Page 21 is where you want to be for the main bearing cap bolts and cylinder head bolts. Do not use a conversion app; the manual gives you the factory number. For worm drive clamps, there is a separate table for spring-loaded types. Ignoring that will cost you a coolant leak.

3 Critical Safety Rules for High-Pressure Fuel Systems

The safety section is not filler. One page covers work on the Common Rail System – and if you have ever seen a guy take a 26,000-psi injection line off without depressurizing, you know why that page exists. The manual also covers electric welding procedures, working with urea solution, and suspended loads. These are not suggestions; they are written by the people who designed the engine. Follow them.

CCN Numbers: Decoding CLAAS Component Numbers

The CCN explanation chapter shows how CLAAS assigns component numbers for electric and hydraulic systems. Each section (A, B, G, M, Y) maps to a subsystem. If you need to order a replacement harness and only have a CCN code, this part of the manual saves you the call to parts. It is cross-referenced directly with Mercedes-benz part numbers.

Cranking Procedure for Built-In Engines

Section 0102 also walks you through cranking the engine in built-in condition on JAGUAR, LEXION, and XERION equipment. Special tools are listed, including the tool for built-in engines. The steps differ by machine model – the manual calls out each variant. Do not try to bridge the starter solenoid without reading this first. You will damage the flywheel ring gear.

The rest of the manual covers oil pan removal (page 78), crankshaft front and rear seal replacement, cylinder head / valves / idler gear (section 0120), injection and fuel system (section 0125), lubricating oil system, cooling, exhaust, air intake, engine control, and exhaust gas aftertreatment. Each section starts with special tool requirements and technical specifications. No guesswork.

Does this manual cover the OM473LA as well?

Yes. The engine data table in section 0102 includes OM473LA specifications alongside OM470LA and OM471LA. However, the bulk of repair procedures focus on the OM470 and OM471. For OM473-specific overhaul details, you will need the separate manual.

Are the torque values given in lb-ft or Nm?

Nm. The manual uses metric units throughout. You will need a torque wrench that reads in Nm, or a conversion chart. I keep a laminated card in my box. Do not convert in your head, and do not use an online calculator that rounds off. One Newton-meter off on a main cap bolt matters.

If you are a home-garage mechanic or a shop owner, the absence of aftermarket fluff in this manual is what makes it worth the money. Every procedure is written for a technician who has the right tools and respects the torque spec. You can cross-reference with other Mercedes-benz diesel manuals like the Mercedes-benz 190, 190E, 190D 2004 Repair Manual – OEM Specs or Mercedes-Benz 190 1984-1988 Automotive Repair Manual for light-duty engines. For the Sprinter crowd, the Mercedes-benz Sprinter 2011 User Manual – Warranty & Service Info covers a different platform. And if you need background on Manual Transmission basics, that is a separate subject – this manual stays on the diesel engine.

Access the Factory Manual. You will have the same information the dealer techs use, with no pages cut out.