Mercedes Actros 3331

The Mercedes-Benz Actros 3331 is a cornerstone of modern defense logistics, engineered to deliver high-payload capacity across on-road and off-road environments. Whether configured as a 6x4 or 6x6 tactical transporter, fuel tanker, or heavy recovery vehicle, the Actros 3331 relies on complex engineering that demands specific, high-quality spare parts maintenance.

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The Mercedes-Benz Actros 3331: A Proven Heavy Logistics Platform in Global Military Service

The Mercedes-Benz Actros 3331 is one of the most operationally significant heavy logistics vehicles in modern defense inventories. As a member of the first-generation MP1 Actros family — produced at the Mercedes-Benz Wörth plant in Germany between 1996 and 2002 — the 3331 designation identifies a vehicle in the 33-tonne gross combination weight class, powered by the 310 HP engine variant of the OM 501 LA inline-six turbocharged diesel. This naming convention, standard across the MP1 Actros range, directly encodes the vehicle's performance category and engine output tier into the model number.

From the moment of its introduction, the Actros 3331 distinguished itself from predecessor heavy trucks through the integration of Mercedes-Benz's Integrated Electronics System (IES) — a multiplexed CAN-bus architecture that centralized engine management, transmission control, braking, and body functions into a coordinated electronic platform. Combined with the OM 501 LA engine's exceptional low-end torque characteristics and the proven G 155/16 HPS 16-speed gearbox, the Actros 3331 delivered a step change in heavy haulage capability, fuel efficiency, and driver ergonomics compared to the SK-series trucks it succeeded.

For defense procurement authorities, the Actros 3331 represented precisely the kind of commercially-proven, high-reliability platform that reduces lifecycle cost and simplifies in-theatre maintenance. Armed forces across Europe, the Middle East, Asia-Pacific, and the Americas have operated the Actros 3331 and its derivatives in frontline logistics roles for over two decades. Canada's Department of National Defence selected the Actros as the basis for its Armored Heavy Support Vehicle System (AHSVS), ordering 86 protected-cab variants in 2007. Singapore's armed forces operate Actros-platform vehicles as high-mobility cargo carriers, crane platforms, and fuel logistics vehicles. Across NATO member states and partner nations, the Actros 3331 remains an active element of defense logistics fleets well into the 2020s — and will continue to do so for years ahead.

AB Defence was established to meet the critical spare parts requirements of exactly these fleets. As a specialist defense industry spare parts supplier, we provide complete parts support for the Mercedes-Benz Actros 3331 across all variants, all systems, and all operational environments. Our supply chain reaches OEM-grade components for the OM 501 LA engine, the G 155/16 HPS transmission, the IES electronic architecture, and every mechanical and structural assembly on the platform — ensuring that Actros 3331 vehicles in your fleet remain mission-capable, maintained to specification, and operationally available when required.

Technical Specifications — Mercedes Benz Actros 3331

Mercedes Actros 3331 Platform Variants

Actros 3331 / 6×4 — Standard Configuration

The 6×4 configuration drives through the rear tandem axles, delivering high payload capacity on paved and semi-prepared surfaces. This variant is widely used in rear-echelon logistics, depot transport, and base support roles where consistent road conditions allow full utilization of the platform's payload capacity. Differential locks on the rear tandem axles provide additional traction where required. A PTO gearbox is available for auxiliary equipment integration.

Actros 3331 / 6×6 — All-Terrain Configuration

The 6×6 all-wheel drive variant extends operational reach to unprepared terrain, field tracks, muddy ground, and adverse weather environments. Three driven axles, combined with inter-axle and cross-axle differential locks, provide the traction performance demanded by forward logistics operations. This variant is the preferred configuration for engineering support, recovery roles, and operations where the final delivery point is off the main supply route. Compatible with front-mounted winch installations and HMF crane superstructures.

Actros 3331 AS — Heavy Haulage Tractor

The 3331 AS tractor variant was produced specifically for heavy haulage applications, including the transport of main battle tanks, armored vehicles, and oversized military equipment on low-loader semitrailers. Available in 6×6 configuration, with a fifth-wheel coupling load of up to 22 tonnes. Gross combination weights exceeding 100 tonnes are achievable in standard operating conditions, with permitted special combinations reaching up to 300 tonnes. Winch-equipped variants were supplied to NATO heavy transport units.

Mercedes-Benz Actros 3331 Spare Parts

OM 501 LA Engine Spare Parts

The OM 501 LA is a heavy-duty inline-six diesel engine representing the core of Mercedes-Benz's heavy truck powertrain at the time of MP1 Actros production. It features a single overhead camshaft driven by a maintenance-intensive but robust roller chain, a unit pump fuel injection system with individual pumps per cylinder on MP1-era variants, and a water-cooled exhaust manifold — an unusual feature that reduces thermal loading on the engine bay and surrounding components. The turbocharger is a fixed-geometry unit on base OM 501 LA variants; later OM 501 LA versions introduced variable geometry turbocharging (VGT) to improve low-speed torque and transient response.

AB Defence supplies the complete range of OM 501 LA engine spare parts including:

Top-End & Valve Train: Cylinder head assemblies (complete and bare), cylinder head gasket sets, valve guides and valve seats, intake and exhaust valves, valve springs and retainers, rocker arm assemblies and rocker shafts, camshaft assemblies and camshaft bearings, camshaft position sensors.

Bottom-End & Rotating Assembly: Pistons (standard and oversize), cylinder liners (wet sleeve type), piston ring sets, gudgeon pins and circlips, connecting rods and small-end bushings, connecting rod bearing shells (standard and undersize), main bearing shells (standard and undersize), crankshaft assemblies, crankshaft front and rear oil seals, thrust washers and thrust bearing sets, flywheel assemblies and ring gears.

Fuel System: Unit injection pumps (individual cylinder pumps), fuel injectors and nozzle assemblies, fuel high-pressure lines, fuel delivery pump (low-pressure lift pump), fuel filter housings and filter elements, fuel temperature sensors, fuel pressure regulators.

Forced Induction & Air System: Turbocharger assemblies (fixed geometry and VGT variants), turbocharger oil feed and drain lines, intercooler assemblies, charge air pipes and silicone hose connections, intake manifold gaskets, air filter housings and filter elements (primary and safety).

Lubrication System: Engine oil pump assemblies, oil pump drive gears, oil pressure relief valves, oil cooler assemblies and heat exchanger elements, oil filter housings and filter elements, crankcase breather valves and oil separator assemblies.

Cooling System: Water pump assemblies, thermostat and thermostat housing, radiator assemblies (core and complete), coolant hoses (upper and lower), coolant temperature sensors, fan drive belt and tensioner, expansion tank and pressure cap, coolant filter elements and SCA (supplemental coolant additive) units.

Timing System: Timing chain sets (single and duplex), timing chain tensioners and guides, timing chain sprockets (crankshaft, camshaft and auxiliary), timing cover gaskets and seals.

Engine Management & Sensors: Engine control unit (ECU/ECM) for OM 501 LA, injection timing sensors, crankshaft position sensors (CKP), oil pressure sensors, coolant temperature sensors, boost pressure sensors, engine wiring harness assemblies.

Gaskets & Seals: Complete engine gasket sets, sump gaskets, timing cover seals, valve cover gaskets, exhaust manifold gaskets, turbocharger gaskets, inter-component sealing rings.

G 155/16 HPS Transmission & Drivetrain Spare Parts

The Mercedes-Benz G 155/16 HPS is a 16-speed constant-mesh gearbox with an overdrive top gear, available in manual shift and semi-automatic (pneumatically assisted) variants. The 155 in the designation refers to the maximum input torque capacity in daNm (1,550 Nm), confirming its pairing with the OM 501 LA engine. The HPS suffix denotes the hydraulic power shift assist system on semi-automatic variants.

AB Defence supplies the following transmission and drivetrain components:

Gearbox Assemblies & Internals: Complete G 155/16 HPS gearbox assemblies (exchange/remanufactured and new), gear sets by ratio group, synchroniser rings and synchroniser hubs by gear position, selector forks and selector rods, gear bearings (all positions), gearbox input and output shaft assemblies, gearbox housing seals and gasket sets, gear shift mechanism assemblies, HPS pneumatic control unit and solenoid valves.

Clutch System: Clutch disc assemblies, clutch pressure plate assemblies, release bearing (throw-out bearing) assemblies, clutch hydraulic master cylinder, clutch pneumatic booster (Booster/Hydropneumatic actuator), clutch slave cylinder, clutch hydraulic pipes and hoses, flywheel and ring gear assemblies.

Transfer Case (6×6 Variants): Transfer case assemblies, transfer case input and output shaft seals, transfer case bearing sets, shift actuator assemblies for high/low range and AWD engagement, transfer case oil seals and gasket sets.

Propshafts & Universal Joints: Front propshaft assemblies, rear propshaft assemblies (forward and rear sections), universal joint cross-kits (all positions), propshaft center support bearing assemblies, companion flanges and yokes, propshaft balancing weights and fasteners.

Front Axle (6×6 Variants): Front axle differential assemblies, front axle CV joint assemblies (constant velocity joints for steered drive axle), front axle wheel hub assemblies, front axle hub bearing kits, front axle oil seals (inner and outer), differential lock actuator (front axle), front axle differential pinion and crown wheel sets.

Rear Axle — HL-6 Tandem: Rear axle differential assemblies (forward and rear rear-axle), inter-axle differential assembly, crown wheel and pinion sets, axle shaft assemblies, axle shaft bearings and oil seals, hub reduction assemblies (planetary hub reducers where fitted), wheel hub assemblies and hub bearing kits, differential lock actuator assemblies, axle breathers and filler plugs.

Braking System Spare Parts — Pneumatic ABS Disc Brakes

The Actros 3331 features a dual-circuit fully pneumatic braking system with disc brakes on all axles and Mercedes-Benz's Electronic Parking Brake (EPB) integrated ABS system — a significant safety and control advancement over the drum brake systems prevalent on earlier generation heavy trucks. This system requires precise, correctly-specified replacement components to maintain ABS functionality and braking performance.

AB Defence supplies the complete range of braking system parts including:

Foundation Brakes: Brake disc assemblies (front and rear, solid and ventilated), brake caliper assemblies (complete), brake caliper repair kits (piston seals, guide pin seals and dust boots), brake pad sets (front and rear axle specification), brake pad wear sensors, brake carrier brackets and guide pins.

Pneumatic Actuation: Air brake chambers — service chambers (Type 20, Type 24 and Type 30 as applicable per axle position), spring brake actuators (piggyback spring-service combination chambers for rear axles), brake chamber mounting brackets, clevis pins and fasteners.

Air Supply & Distribution: Triple protection valve assembly, relay valves (accelerator valves for rear axle actuation), foot brake valve assembly, hand brake valve (parking brake control), trailer brake valve and trailer connection couplings (glad hands), air dryer assembly and desiccant cartridge, pressure protection valves, air reservoir tanks (wet tank, front axle circuit tank, rear axle circuit tank), drain valves, pressure gauges and switches.

ABS System: ABS sensors (passive electromagnetic type) per wheel position, ABS exciter rings (tone rings) per wheel position, ABS electronic control unit (ECU), ABS modulator valve assemblies per axle, ABS wiring harness and connector sets.

Suspension System Spare Parts

Front Suspension: Front parabolic leaf spring assemblies, spring pins and bushings, spring shackle assemblies and bushings, U-bolt sets (front axle), shock absorber assemblies (front), stabilizer bar assemblies, stabilizer bar link rods and bushings, stabilizer bar clamp brackets.

Rear Suspension: Rear parabolic leaf spring assemblies (primary and auxiliary springs, forward and rear bogie positions), spring pins and bronze bushings, spring shackle plates and bushings, rear axle U-bolt sets, shock absorber assemblies (rear bogie), trunnion shaft assemblies (bogie pivot), trunnion shaft bushings and seals, bogie beam assemblies.

Steering System Spare Parts

The Actros 3331 uses a hydraulic power-assisted steering system with a ZF Servocom recirculating ball steering gear — a robust and field-proven system widely used across commercial and military heavy vehicles of this generation.

AB Defence supplies: Hydraulic power steering pump assemblies, steering gear box assemblies (ZF Servocom, complete), steering gear box repair kits, steering column assemblies, intermediate steering shaft and universal joints, drag link assemblies, track rod assemblies (front axle), track rod ends (inner and outer), steering arm assemblies, power steering hydraulic hose sets (high-pressure and return), power steering fluid reservoir assemblies, power steering fluid cooler, steering knuckle assemblies and kingpin sets.

Electrical & Electronic Systems Spare Parts

The MP1 Actros introduced a level of electronic integration unprecedented in heavy trucks at the time of production. The IES (Integrated Electronics System) architecture uses a CAN bus network to connect the engine ECU, transmission control module, ABS ECU, instrument cluster, and body electronics into a coordinated system. Correct part identification and replacement of these electronic components requires accurate diagnosis — and AB Defence's technical team provides parts identification support using Mercedes-Benz WIS documentation and system data.

Engine & Drivetrain Electronics: Engine control unit (ECU) for OM 501 LA, transmission control module for G 155/16 HPS, ABS electronic control unit, IES body control modules (multiple, by function).

Power Generation & Starting: Alternator assemblies (standard output and high-output variants), voltage regulator assemblies, starter motor assemblies, starter solenoid, battery isolator switch assemblies, battery cables and terminal sets.

Instrumentation & Controls: Instrument cluster assemblies (analogue type), individual gauge units (speedometer, tachometer, fuel, temperature, air pressure), analogue tachograph mechanisms and chart rolls, dashboard switch panels, stalk switch assemblies (wiper, indicator, headlamp), driver display module.

Lighting: Headlamp assemblies (complete), headlamp bulb sets (H4/H7), fog lamp assemblies, indicator lamp assemblies (front, side and rear), tail lamp assemblies, reverse lamp assemblies, work lamp assemblies and brackets, marker lamp assemblies.

Body Electrical: Central wiring harness assemblies (engine bay, cab, chassis), connector and terminal repair kits, relay and fuse box assemblies, individual relays by circuit function, horn assemblies, heated mirror glass elements, electric window regulator motors, wiper motor assemblies, wiper blade and arm sets.

Hydraulic System & PTO Spare Parts

For Actros 3331 vehicles equipped with hydraulically-driven bodies or superstructures — including tipper bodies, HMF and equivalent crane installations, and tanker pump systems — AB Defence provides comprehensive hydraulic system parts support.

PTO (Power Take-Off): PTO gearbox assemblies compatible with G 155/16 HPS, PTO engagement actuators (pneumatic and electric), PTO output shaft seals and bearings, PTO mounting gaskets and hardware.

Hydraulic Pumps & Motors: Gear pump assemblies (tipper circuit), piston pump assemblies (crane circuit), hydraulic motor assemblies, pump drive couplings and adaptors.

Control Valves & Cylinders: Directional control valve assemblies, solenoid valve coils and bodies, hydraulic cylinder assemblies (tipper ram and stabilizer leg cylinders), cylinder seal kits by bore and stroke, hydraulic cylinder end cap and piston assemblies.

Hydraulic Ancillaries: Hydraulic hose assemblies (custom lengths and fittings), hydraulic fittings and adaptor sets, return line filters and filter elements, suction strainers, hydraulic reservoir assemblies, oil cooler assemblies, pressure relief valves, flow control valves.

Cab, Body & Structural Spare Parts

Cab Structure & Glazing: ClassicSpace S cab panel assemblies, cab door assemblies (complete), door glass (door window, quarter window), windscreen assemblies, cab rear window glass, cab corner panels and trim.

Cab Mounting & Suspension: Cab front mount assemblies, cab rear mount assemblies, cab tilt mechanism and ram assembly, cab lock assemblies.

Interior: Seat assemblies (driver and passenger), seat suspension units, three-point seatbelt assemblies, dashboard assemblies, glove box assemblies, interior trim panels, door seal profiles and weatherstrip sets, floor mat assemblies.

Exterior: Sun visor assemblies, exterior mirror head assemblies, mirror arm assemblies, mirror glass (flat and wide-angle), step assemblies (cab entry and chassis), grab handle assemblies, mudguard assemblies (front and rear), fuel tank assemblies (single-tank 300–400 litre configuration), fuel tank straps and brackets, fuel filler cap assemblies, exhaust stack assemblies (vertical military configuration).

Military Applications

Bulk Cargo & Supply Transport — The primary operational role of the Actros 3331 across most armed forces. The platform's 26-tonne GVW, long wheelbase, and robust chassis support sustained logistics operations over extended supply routes to forward positions. Compatible with flatbed, curtainsider, and dropside body configurations.

Heavy Haulage & Armored Vehicle Transport — In the 3331 AS tractor configuration, this platform serves as a prime mover for low-loader semitrailers transporting main battle tanks, infantry fighting vehicles, artillery systems, and oversized military equipment. Special-permit combinations reaching 300 tonnes gross have been operated under NATO heavy transport protocols.

Engineering & Construction Support — Tipper-bodied Actros 3331 variants support combat engineering tasks including airfield construction, road building, field fortification, and obstacle clearance. The PTO gearbox enables direct drive to crane superstructures such as the HMF 1253K and equivalent, extending the platform's utility to material handling and load placement operations.

Fuel & Fluid Logistics — Tanker-bodied variants have been deployed for bulk diesel, aviation fuel, and potable water transport in field environments. The robust fuel system and high GVW make this platform an efficient and maintainable logistics asset for extended campaign support.

Armored Support Platform (AHSVS) — The Canadian Army's AHSVS program demonstrated the Actros platform's compatibility with protected cab integration. The 86-vehicle fleet, fitted with composite armor cabs developed by Land Mobility Technologies and Composhield, entered service as the primary heavy support vehicle for expeditionary operations, confirming the platform's value as a base for armor integration programs.

Recovery & Vehicle Extraction — The 6×6 variant, particularly when fitted with a rear winch, has been used in light recovery roles, soft-ground vehicle extraction, and field casualty evacuation support. The OM 501 LA engine's high torque output and the three-axle drive system provide the traction performance necessary for demanding recovery scenarios.

Military Deployment Roles: Actros 3331 in Defense Operations

The Mercedes-Benz MP1 Actros ceased production in 2002, succeeded by the MP2 generation. More than two decades after the end of production, however, significant numbers of MP1 Actros 3331 vehicles remain in active military service worldwide. The commercial spare parts market for this generation has contracted substantially — mainstream Mercedes-Benz dealer networks have reduced MP1 Actros parts stockholding, and general truck parts distributors frequently lack the specific MP1-generation components required. For military operators, this creates a genuine operational risk: vehicles that are mechanically sound and structurally serviceable cannot be maintained to operational standard because critical parts are unavailable through normal procurement channels.

AB Defence was established to solve precisely this problem. We maintain dedicated procurement relationships with OEM-authorized distributors, licensed remanufacturers, and verified surplus stocks specifically for legacy military vehicle platforms including the MP1 Actros 3331. Where OEM new parts are unavailable, we source remanufactured assemblies that meet OEM specification — providing a serviceable component that restores the vehicle to operational status without compromising reliability or safety.

Technical Accuracy in Parts Identification

Incorrect parts identification is one of the most costly and operationally disruptive errors in military vehicle maintenance. The Actros MP1 generation spans vehicles produced across a six-year period, with multiple engine variants (EURO 2 and EURO 3 emission standards), two transmission variants (manual and semi-automatic HPS), two axle configurations (6×4 and 6×6), and multiple cab and body options. Part numbers vary across these variants, and a component that fits one specification may not be correct for another.

AB Defence's technical team resolves parts identification using Mercedes-Benz WIS (Workshop Information System) and ASRA documentation, cross-referenced against the vehicle's 17-digit VIN, chassis number, and build date codes. We confirm fitment before dispatch and provide full technical documentation with each supply to support the end-user's maintenance records. This discipline eliminates the risk of incorrect parts being fitted to operational vehicles — a risk that is unacceptable in a defense maintenance environment.

Defense Procurement Compliance

Military spare parts procurement is subject to documentation, traceability, and quality assurance requirements that do not apply in the commercial vehicle aftermarket. AB Defence operates within this environment as standard practice. We provide certificates of conformity for critical components, full supply chain traceability documentation, and technical data packages that satisfy government procurement audit requirements and NATO logistics standards. Our quotation process includes part number confirmation, specification data, country of origin, and lead time — the information that procurement officers require to process an order through their supply chain management systems.

Emergency & Priority Supply Capability

A heavy logistics vehicle grounded for a spare part represents a direct reduction in fleet operational availability. In a deployed environment, this can translate into mission impact. AB Defence maintains priority and emergency supply pathways for Actros 3331 parts, with the ability to expedite shipments globally through military logistics channels and commercial air freight. We understand that the value of a critical part is not its unit price — it is the operational capability it restores. Our supply protocols reflect this understanding.

Frequently Asked Questions Mercedes-Benz Actros 3331 Spare Parts

Which engine variants does AB Defence support for the Actros 3331? AB Defence provides full parts coverage for the OM 501 LA engine as fitted to MP1-generation Actros 3331 vehicles, covering both EURO 2 and EURO 3 emission specification variants. The OM 501 LA remained the sole engine option for the 3331 throughout the MP1 production period.

Can AB Defence supply parts for both the 6×4 and 6×6 Actros 3331? Yes. We maintain parts coverage for both axle configurations, including the additional front axle drive components, transfer case, and front differential assemblies specific to the 6×6 AS variant that are not present on the 6×4 S configuration.

Does AB Defence supply parts for the Canadian Army AHSVS vehicles? Yes. The AHSVS vehicles are based on the standard Actros commercial platform, and all mechanical systems — engine, transmission, axles, brakes, suspension, and steering — are identical to standard Actros 3331 production. AB Defence's parts coverage applies in full to these vehicles.

How does AB Defence identify the correct part for a specific vehicle? We use the vehicle's 17-digit VIN, build date, and chassis number to confirm the correct specification before recommending parts. Our team cross-references Mercedes-Benz WIS and ASRA documentation to validate fitment. Customers are encouraged to provide full vehicle identification data with their parts enquiries.

What is AB Defence's lead time for Actros 3331 parts? Lead times vary by part category. Consumable service parts — filters, gaskets, seals, brake pads — are typically available from stock for immediate dispatch. Major assemblies — complete gearboxes, axle differentials, engine components — may require sourcing lead times of one to four weeks depending on current inventory status. Emergency supply options are available for operationally critical requirements.

Can AB Defence supply complete engine or gearbox assemblies? Yes. AB Defence can supply complete remanufactured OM 501 LA engine assemblies and complete G 155/16 HPS gearbox assemblies on an exchange basis, as well as new assemblies where available. Complete assemblies are supplied with documentation confirming build specification and test certification.

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