Quarry haulage punishes a truck in three specific ways, and they pull against each other. The ramp demands low gearing and torque at the bottom of the rev range. The run out to the weighbridge demands enough top gear to keep cycle times down. And the shift pattern demands a driveline that survives being loaded and unloaded forty times a day without a rebuild. Get one of those three wrong and you spend the difference in fuel, brakes or gearboxes.

Only one truck in the Ecuador mining and quarry set is configured against this job, which is why this article is a single-model deep dive rather than a range guide: the Auman GTL 6×4 55-tonne box tipper. Every figure below comes from its published specification, and where the specification contradicts itself or leaves a gap, that is flagged rather than smoothed over — because in this class of vehicle the contradictions are usually where the money is.

1. The driveline: 430 PS, 2,000 Nm and a 5.26 final drive

The engine is a Foton Cummins ISG12 — 11,800 cc, listed at 430 PS, with the full engine designation given as ISGe3-430. Peak torque is 2,000 Nm between 1,000 and 1,400 rpm. That torque band is the number that matters in a quarry, because it is wide and it sits low. A 2,000 Nm plateau stretching 400 rpm means the driver can hold a gear up a ramp instead of hunting for one, and hunting for gears on a loose surface is how you break driveline parts.

Behind the engine is a Fast Gear 12JSDX240T(Q) with an iron casing, twelve speeds, rated at 240 in the model designation. The iron casing is not a detail to skip: on a slag and aggregate truck, an iron-cased gearbox resists the impact loading and heat cycling that an aluminium case handles less gracefully, at the cost of some weight. For this duty the trade is the right way round.

The drive axle ratio is 5.26. In a 6×4 tipper doing pit-to-stockpile or quay work, 5.26 with a twelve-speed box gives you a very low overall first gear for a loaded start on a grade, and enough splits to keep the engine in that 1,000–1,400 rpm window across the whole ramp. What it does not give you is a relaxed highway cruise. If your haul route includes a long flat run at speed, 5.26 will have the engine working harder than a 4.76 or lower numerical ratio would. That is the trade and it is a deliberate one.

2. GVW 50,000 kg and the body that sits on it

The truck declares a GVW of 50,000 kg and sits in the 55-tonne class. Read those two numbers together carefully, because they are not the same statement. In this specification sheet, 55T is given as the tonnage class, while 50,000 kg is given as the GVW. A buyer who reads "55-tonne truck" and plans a 55-tonne gross weight is planning to run 5,000 kg over the declared figure. Plan your loads against the 50,000 kg GVW until the supplier puts something different in writing.

The body is listed as 5,600 (5,400) × 2,300 × 1,100 mm. The bracketed figure is the one to interpret: it reads as an internal length of either 5,600 mm or 5,400 mm depending on the body variant fitted, with 2,300 mm width and 1,100 mm side height being common to both. At 5,600 mm internal length that is 5.600 × 2.300 × 1.100, which is 14.2 cubic metres of level-struck volume; at 5,400 mm it is 13.7 cubic metres. Both are also listed with an option code for the upper structure, so confirm which length is being built.

That volume figure decides what you can actually move. Fourteen cubic metres of dry aggregate is one thing; fourteen cubic metres of wet dense slag is quite another, and the 50,000 kg GVW will be the binding constraint long before the sides are heaped. Run your own material density against the box, then against the GVW, and the answer usually tells you whether this is a volume truck or a mass truck on your site.

3. Axles, frame and tyres: where the load actually lands

Front axle capacity is 7.5 tonnes, and the middle and rear axle capacity is 16 tonnes. The frame cross-section is given as 225/320 × 90 × (8+7) mm, the wheelbase is 3,575 + 1,350 mm, and there are 11 tyres on 12R22.5 rubber, described as a mixed-use pattern (U8-12R22.5).

The tyre count is worth pausing on. Eleven tyres on a 6×4 means a twin-steer arrangement rather than a single steering axle, which is a common configuration in this class because it spreads the front load across two axles before the weight reaches the frame rail. This is a big part of why the truck can declare a 5.5-tonne front axle rating in other GTL listings while this one declares 7.5 tonnes per axle group — and it is why you should treat the axle ratings as group ratings, not per-axle figures, when you check them against a local bridge formula.

The tyre pattern options listed are U8, Z8, XD, ZD, NA, ZL and U9. That is a genuinely useful option list for a quarry fleet, because it lets you specify a more aggressive tread for a wet pit floor or a more road-biased pattern for a long paved haul without changing the truck. Specify the pattern against the actual surface your trucks run on, not against the photograph.

Dump Truck · Ecuador

Auman GTL 6×4 box tipper — 430 PS, 2,000 Nm, final drive 5.26

Foton Cummins ISG12 (ISGe3-430), 11,800 cc · 430 PS · 2,000 Nm @ 1,000–1,400 rpm · Fast 12JSDX240T(Q) iron casing, 12-speed · final drive 5.26 · GVW 50,000 kg · body 5,600 (5,400) × 2,300 × 1,100 mm · 11 tyres on 12R22.5 · 350 L aluminium tank

Listed at $46,700 · Earth, stone, sand and slag haulage

View full specification →

4. Brakes, cab and the 350-litre tank

Braking is front and rear drum with an air brake system and ABS, and the steering gear is a ZF8098 unit. Drum brakes on a 50-tonne quarry truck are the conventional choice: on a long descent with a full body, drums cope with heat cycling better and are cheaper to re-line than a disc package, provided your drivers understand how to use the exhaust brake and the gears together. Note that whatever retarder function exists is on the engine side, not a separate listed device — this specification does not name one, so drive it on the assumption that the gears are your primary descent control.

The fuel tank is 350 litres in aluminium alloy. For a quarry truck working a fixed loop, 350 litres is a sensible single-shift-plus tank, and an aluminium tank saves tare weight against steel. If your pit is remote and your fuel deliveries are irregular, that is a number to check against your actual daily consumption before you commit — a bigger tank is an option question, not a retrofit you want to be doing in the field.

The cab is a flat-roof configuration seating two, with manual air conditioning as standard and a K/0 air conditioning option code, plus a 165/0 battery option code. Standard body assembly is power windows, central lock, a unified five-lock system, an airbag seat and manual rearview mirrors. On a quarry truck the airbag seat is not a luxury item: pit floors are rough and a driver who is being thrown around all shift drives badly by the end of it.

Steering direction is left-hand drive, and vehicle status is complete vehicle, with an approved model designation of BJ3259DLPKB-1. That last point matters more than it looks: a complete vehicle with a named approval number is registerable as a unit, rather than a chassis that has to be homologated again after body fitting.

5. Emission standard, and the country-of-sale contradiction you must resolve

The truck is listed as Euro III, with the emission route field left blank. If your import permit requires Euro IV or higher, this specification as published will not satisfy it, and an emission change is an engine build change, not a configuration line. Confirm your required standard before you negotiate anything else, because it can invalidate the whole comparison.

Now the item that must be raised. This truck is being presented as an Ecuador quarry truck, but the specification sheet's country of sale field reads Peru. Those are not the same market and they can carry different approval requirements. The use-case description — transporting earth and stone, transporting sand, slag truck — fits quarry work perfectly, and the machine itself is plainly suited to Andean pit and stockpile duty. But the paperwork and the declared sales country do not match the country you are buying from.

Do not resolve this by assumption in either direction. Ask the supplier, in writing, which market configuration will actually be built for an Ecuador order and whether the approval document referenced by this listing will be issued against that build. If the answer is that the listing was configured for Peru and would need to be reissued, that is a normal commercial conversation to have before a deposit, and an unreasonable one to have after arrival.

Axle-load law and the road reality in Ecuador

Ecuador applies axle-load limits in line with regional Mercosur practice — a single-axle limit around 10–10.5 t, a tandem around 18 t and gross combination weight near 45 t — enforced by the ANT. Guayaquil is the banana-export gateway, and the roads climb fast into the Andes. The practical catch is that the mountain grades eat power, so a truck bought for the coast under-performs on the climb to Quito. The core business is banana and port export freight, and the terrain is the differentiator: a truck bought for flat-ground numbers loses legal capacity where the grade and the bridge limits bite.

For a tipper the binding constraint is the haul from the pit to the trunk road, where the the road authority weighbridge is the point where an over-loaded unit collects its fine — and banana and port export freight runs through here, so the box that fills to the headline weight on site can be over the axle caps before it reaches the highway.

What Ecuadorian fleets already run

In Ecuador the reference vehicle is a used Japanese truck — Isuzu and Hino dominate the second-hand market — with European brands (Volvo, Scania, Mercedes-Benz) in the premium segment, Sinotruk and Shacman as the established Chinese players, and local assembly in some markets. The used Japanese truck wins on parts density but loses on age and the rebuild cost that lands within a couple of years. The new Chinese truck wins on warranty and a clean bill of health. The mountain grades and long corridors are where a fresh, correctly specced truck beats a tired one, and that is Foton’s pitch.

6. Five checks before you sign

Reconcile the tonnage class with the GVW. The sheet says 55 T class and 50,000 kg GVW. Build your load plan on the 50,000 kg figure, and get the supplier to state which number governs the approval and the warranty.

Confirm the body length. The body is published as 5,600 (5,400) × 2,300 × 1,100 mm with an upper-structure option code. Ask which internal length will be built, because 200 mm of body length is roughly half a cubic metre of level-struck volume and it is the difference between a 14.2 and a 13.7 m³ body.

Resolve the country of sale. The listing declares Peru while the article references Ecuador. Have the market configuration and the applicable approval document confirmed for an Ecuador order in writing.

Match the tyre pattern to the haul road. Seven pattern families are listed for 12R22.5. A pit-floor pattern and a paved-haul pattern are different tyres, and the option list lets you choose — so choose, rather than accepting the default.

Check the emission standard against your permit. The published standard is Euro III with a blank emission route. If your registration requires better, say so before the price conversation, because it changes the engine, not the badge.

Set against the job, the specification is coherent: 2,000 Nm from 1,000 rpm, a twelve-speed iron-cased box, a 5.26 final drive and an 11-tyre 6×4 chassis is a driveline designed by someone who has watched a loaded tipper try to climb out of a wet pit. The listed price of $46,700 is a listing price and not a landed cost, and freight, duty and any local bodywork sit on top of it. Fix the four open items above in writing, and what remains is a straightforward quarry truck with a specification you can defend.