Is a 70 Ton Off-road Mining Dump Truck the Right Fit for Your Pit?

A 70 ton off-road mining dump truck sits in the class where a haul fleet stops being a collection of site trucks and starts being a production system. It is heavy enough to replace two or three rigid-frame tippers on a long ramp, light enough to work a bench that was cut for smaller machines, and sized so that one loader can keep it cycling without a second unit standing idle. The PX105 70 Ton Off-road Mining Dump Truck is built around that balance: a 70,000 kg rated load on a 105,000 kg gross vehicle weight, a 40 m³ mining body with an NM450 floor, and a 520 hp YuChai engine on a three-axle chassis. This guide explains what each figure does in daily operation, where the 70 ton class belongs in a loading fleet, how it compares with 80 and 95 ton haulers, and what to verify before you place an order.

Table of Contents

01. What Does 70 Ton Measure on the PX105?

02. Why Does the 40 m³ Body Decide Your Real Cost per Ton?

03. Which Specifications Deserve Scrutiny Before You Buy?

04. Where Does a 70 Ton Hauler Fit in the Loading Fleet?

05. YuChai 520 hp or Weichai 530 hp: Which Version Should You Order?

06. How Do the Chassis, Axles and Suspension Handle Rough Haul Roads?

07. How Does the 70 Ton Class Compare with 80 and 95 Ton Trucks?

08. What Should Buyers Check Before Ordering?

09. How Can Owners Protect Uptime in Dust and Heat?

10. How Does Qingdao Pengcheng Glory Machinery Approach the PX105?

11. Frequently Asked Questions

12. Contact and Project Support

What Does 70 Ton Measure on the PX105?

"70 ton" is rated payload, not the weight of the machine. The PX105 carries 70,000 kg of material per trip, its own curb weight is 35,000 kg, and the rated total weight is 105,000 kg. Read those three numbers together and the economics of the truck become visible: the payload is what earns money, while the 35,000 kg curb weight is mass that the tyres, brakes and haul road carry on every cycle without producing a ton of revenue.

That works out to a payload share of about 67 percent of gross weight. The figure matters because it sets fuel burn, tyre life and brake wear per ton hauled. Two trucks with the same nominal payload can have different shares, and the one carrying less structure per ton is cheaper to run over a ten-year life — provided its axles, frame and suspension are actually rated for the duty rather than trimmed to hit a number on a brochure.

The working envelope is equally practical. Overall dimensions are 9,600 x 3,680 x 4,300 mm on a 4,000 + 1,690 mm wheelbase, with a front track of 2,792 mm and a rear track of 2,606 mm. Minimum ground clearance is 435 mm and the minimum turning radius is 12 m or less — the pair of figures that decides whether the truck can work a tight bench, a switchback and a dump edge without a spotter walking it through every pass. Maximum speed is 40 km/h and rated gradeability is 35 percent, which covers normal pit ramp design when the truck is loaded to its rating.

Important: The 70,000 kg figure assumes the designed gross weight on a maintained haul road. Every extra ton above the rating is borrowed from tyre life, brake life and axle life, and it is repaid with interest in the workshop.

Why Does the 40 m³ Body Decide Your Real Cost per Ton?

The body is a 40 m³ mining box measuring 6,400 x 3,400 x 1,800 mm inside, with a 16 mm NM450 bottom plate and 10 mm Q355 side plates, emptied by a Hyva 202 front-lift cylinder. Those plate choices follow the loads each surface actually sees: the floor takes the direct impact of the bucket or shovel and the sliding abrasion of every dump, while the side plates mainly resist abrasion and bulging, so a structural grade at 10 mm does the job without adding dead weight high on the chassis.

Volume and weight rarely bind at the same time, and this is where owners lose money. At a typical ore density of about 2.7 t/m³, the PX105 reaches its 70,000 kg payload at roughly 26 m³ — the truck is weight-limited long before the body is full, and loading by "fill it up" simply overloads the machine. At an overburden density of about 1.6 t/m³, the same 40 m³ body holds only about 64 t, so the truck becomes volume-limited and the body, not the rating, sets output. Run both calculations for the material you will actually move, then decide whether standard loading practice, a different body size, or a different class of truck is the honest answer.

Body dimensions also set the loading pattern. The 1,800 mm side height keeps the loading height within reach of a mid-size wheel loader or a small excavator, and the 3,400 mm width gives the operator room to spread a bucket instead of dropping it in one spot — which is what produces the floor damage that shows up as premature plate replacement two years into service.

Which Specifications Deserve Scrutiny Before You Buy?

Brochure headlines do not decide whether a truck suits a site. The figures below are the ones that change daily decisions on the PX105.

Actual figures depend on configuration, tyre selection and site conditions. Work from the manufacturer's current specification sheet for the exact unit being quoted.

Where Does a 70 Ton Hauler Fit in the Loading Fleet?

The PX105 is normally matched to a 3.5 to 6 m³ loading fleet rather than to the largest shovel in the pit. On nominal heaped volume, a 40 m³ body takes about 12 passes from a 3.5 m³ bucket, about 9 from a 4.5 m³ bucket and about 7 from a 6 m³ bucket. Treat those counts as a starting point, not a rule: once density is applied, a weight-limited ore will fill the truck in fewer passes than the volume count suggests, and a volume-limited overburden will need the full count to reach the rating.

Matching matters more than headline capacity. A loader that is too small turns the truck into a queue at the face; a loader that is too large fills the body in three passes and leaves the operator guessing at the load, which is how trucks end up running over gross weight on the ramp. The aiming point is a truck that leaves the face full, or deliberately short of full where density demands it, with the loader free to start on the next unit.

Where the class earns its keep:

• Metal and coal open pits: continuous ore and overburden haulage on graded ramps, where the 35 percent gradeability rating covers normal pit design.
• Quarries and aggregate plants: short cycles between face, crusher and stockpile, where a 40 m³ body keeps the crusher fed without a dedicated large hauler.
• Cement and industrial minerals: steady limestone and clay haulage on maintained internal roads.
• Large earthworks and infrastructure: bulk cut and fill where a road-legal tipper is cycle-limited by payload.
• Waste dump and rehabilitation: spreading and re-handling on soft, uneven ground, where the equalizing suspension and 435 mm clearance keep the frame off the surface.

Important: This is an off-road machine on 16.00R25 mining tyres with a 40 km/h maximum speed. Plan for in-pit movement or low-bed transfer between sites rather than highway travel, and confirm local registration requirements before purchase.

YuChai 520 hp or Weichai 530 hp: Which Version Should You Order?

Both engines are factory options on the same chassis and both are matched to the FAST 8DS260/240 gearbox, so the choice is rarely about performance on paper. It is about what happens in year four, when a turbocharger, injector or cylinder head is needed and the nearest authorised dealer is either a two-hour drive or a two-week shipment away.

The YuChai YC6K520-GT30 is rated at 520 hp and the Weichai WP13G530E310 at 530 hp. Before fixing the configuration, confirm three things: the service network and parts stock in your region for each brand, the fuel quality your site actually receives, and the emission configuration accepted in the destination market. A 530 hp rating is of no value if the only technician who can diagnose it is on another continent.

Tank size belongs in the same conversation. The 600 L steel tank sets the refuelling interval for a shift, and on a long haul profile with a distant fuel point it may mean a bowser or a second tank rather than an extra trip. Calculate it from your own cycle time and fuel burn per hour, not from a generic figure.

How Do the Chassis, Axles and Suspension Handle Rough Haul Roads?

Haul roads are the least controlled part of any pit: they rut after rain, they wash out at the crest, and they are re-graded on a schedule that has nothing to do with your production plan. The chassis has to absorb that without passing the shock into the frame or the operator.

The PX105 runs a welded semi-rigid box frame with a Pengxiang 25 t cast steel front axle and a Pengxiang 40 t cast steel dual-reduction middle and rear axle. Those ratings are the reason the 70 t payload is credible on a 35,000 kg chassis: the axles are sized for the gross weight the truck is designed to carry, not for the empty machine plus a margin.

Suspension is a full-welded equalizing arrangement with a reinforced removable equalizing shaft, oil-gas springs at the front and 120 x 27 x 18 leaf springs at the rear. The equalizing layout lets the rear axles share load instead of one axle taking the full hit at a crest or a pothole, and the removable shaft means a worn equalizing component can be replaced without cutting the assembly out of the frame. On a loaded descent that combination keeps the body level enough to dump cleanly on a bench that is not perfectly flat.

Steering is EATON full hydraulic power steering, which keeps effort manageable at the dump point where the truck is manoeuvring at low speed with a full body. Stopping is handled by a SORL brake system with drum brakes on all three axles and exhaust braking for long descents, so the service brakes are not asked to absorb the whole grade. The cab is a reversible wide-body offset unit with electronic air conditioning, reinforced mirrors and a clear instrument panel — small details that decide whether an operator finishes a twelve-hour shift as sharp as they started it.

How Does the 70 Ton Class Compare with 80 and 95 Ton Trucks?

The three-axle wide-body family scales in a straight line: the PX105 at 70,000 kg and 40 m³, the PX115MT at 80,000 kg with a 45 m³ body, and the PX136MT at 95,000 kg with a 50 m³ flat body on a 140,000 kg gross weight. Each step buys payload per trip and costs bench width, turning envelope, tyre size and capital.

One figure in that table surprises buyers. The 70 ton PX105 is rated at 35 percent gradeability, while the 80 ton PX115MT is rated at 30 percent on a 115,000 kg gross weight. On a pit with steep ramps, the smaller truck can hold its rated grade with a loaded body where the larger one is already at its limit — which is why ramp design, not payload alone, should decide the class on hilly ground.

The practical question is not which truck is biggest but which one your bench, ramp and loader can support. A 95 ton hauler on a bench cut for a 70 ton truck spends its life being spotted into position, and a 70 ton truck on a pit designed for 95 ton haulers adds cycles that the schedule may not have. Measure the bench against the 3,680 mm overall width, check the ramp against 35 percent gradeability, and confirm the 12 m turning radius at your tightest switchback before choosing the class.

What Should Buyers Check Before Ordering?

A hauler is a ten-year asset and the cheapest quote is rarely the lowest cost per ton. Work through the following before signing.

• Payload against density: calculate whether the 40 m³ body or the 70,000 kg payload binds first for your ore or overburden.
• Haul road geometry: check bench width against the 3,680 mm overall width and ramp grade against the 35 percent rating.
• Turning and dump points: confirm the 12 m turning radius works at your tightest switchback and at the dump edge.
• Loading match: confirm the bucket size that will serve the truck and the pass count it produces at your density.
• Engine and service network: YuChai 520 hp or Weichai 530 hp — pick the one your workshop and parts supply can actually support.
• Emission and market requirements: confirm the configuration accepted in the destination market before the order is fixed.
• Tyre supply: 16.00R25 as standard. Verify local availability and replacement cost over the planned life.
• Fuel logistics: a 600 L tank sets your refuelling interval; remote sites may need a bowser.
• Axle and frame rating: 25 t front and 40 t dual-reduction rear axles under a welded semi-rigid box frame should be reviewed against your real gross-weight practice, not the nominal figure.
• Documentation: request the current specification sheet, operation manual, parts catalogue and warranty terms with the quotation.

How Can Owners Protect Uptime in Dust and Heat?

Most unplanned stops in a pit trace back to filtration, cooling, lubrication and tyres rather than to structural failure. The PX105 is a simple, serviceable platform, and the discipline that keeps it running is ordinary.

• Service the air filtration on schedule; a dust-loaded element pulls power and fuel economy down long before it fails outright.
• Keep the radiator and charge-air cooler clean, and check them more often in dry, windy seasons than the interval suggests.
• Inspect hydraulic lines and the hoist circuit every shift; a weeping seal at the Hyva cylinder becomes a dumped-load incident if it is ignored.
• Record tyre pressures and tread depth by position to catch alignment or loading problems early, and watch for cuts and heat damage on 16.00R25 casings.
• Use the exhaust brake on every loaded descent so the drum brakes stay cool and available.
• Keep the equalizing shaft and spring packs clean and inspected; a worn bushing there shows up first as uneven tyre wear.
• Log fuel, tyres and downtime per unit so the real cost per ton is visible month by month rather than at year end.

Operator feedback is maintenance data. A change in steering effort, suspension behaviour or brake feel is usually reported by the driver before it appears on a defect sheet — treat those reports as the cheapest diagnostic tool on site.

How Does Qingdao Pengcheng Glory Machinery Approach the PX105?

Qingdao Pengcheng Glory Machinery Co., Ltd. supplies the PX105 as a 70 ton payload off-road mining dump truck on a three-axle chassis with a 105,000 kg gross weight. The configuration is intended for open-pit mines, quarries, cement plants and large earthworks where haul roads are unpaved and gradients are part of the layout.

The same family includes the PX115MT 80 ton and the PX136MT 95 ton models, which use the same body-and-chassis logic at larger payloads. Buyers planning a pit expansion can compare the three against one haul-road design instead of mixing platforms from different suppliers.

Frequently Asked Questions

1. What is a 70 ton off-road mining dump truck mainly used for?

Hauling ore, waste rock and overburden in open-pit mines, quarries, cement plants and large earthworks. It is an off-road machine, designed for internal haul roads rather than public highways.

2. Does 70 ton mean payload or total weight?

Payload. The PX105 carries 70,000 kg of material per trip, on a 105,000 kg rated total weight with a 35,000 kg curb weight.

3. Which engine and gearbox does the PX105 use?

A YuChai YC6K520-GT30 rated at 520 hp as standard, or a Weichai WP13G530E310 rated at 530 hp as an option, both matched to a FAST 8DS260/240 gearbox.

4. How big is the body, and what is it made of?

A 40 m³ mining body measuring 6,400 x 3,400 x 1,800 mm inside, with a 16 mm NM450 bottom plate, 10 mm Q355 side plates and a Hyva 202 front-lift cylinder.

5. Can the PX105 run on 35 percent ramps when loaded?

Yes, 35 percent is the rated maximum gradeability at rated load. Real ramp design should stay inside that figure with a margin for road condition, tyre wear and weather.

6. What information should I provide when requesting a quotation?

The material type and density, planned haul distance and ramp gradients, bench and switchback dimensions, required payload, preferred engine and service network, tyre preference, destination market and any emission requirements, plus delivery site and schedule.

Planning Your Next Haulage Configuration?

Choosing a 70 ton hauler starts with the bench, the material and the ramp design, not with the tonnage badge. If you are evaluating a mining dump truck for an open-pit operation, quarry or large earthworks project, Qingdao Pengcheng Glory Machinery Co., Ltd. can review the PX105 specification against your actual working conditions.

Send us your material density, haul profile, bench dimensions and destination market, and we will help you confirm whether the PX105 configuration fits the duty.

Contact us: market@everglorymachinery.com | +86-18615978923 | WhatsApp +86-18153282520