How Do You Match an 80 Ton Off-road Mining Dump Truck to a Shovel and a Haul Road?

An 80 ton off-road mining dump truck is only as productive as the loading tool in front of it and the ramp behind it. Body volume, bucket size, material density and gradient limits decide whether a 45 m³ body leaves the face full or half empty, and whether the truck keeps its cycle time on the way up the ramp. The PX115MT 80 Ton Off-road Mining Dump Truck is a useful reference point for that calculation: 80,000 kg payload on a 115,000 kg gross weight, a 6,350 mm body, and a 30 percent gradeability rating. This guide works through the matching arithmetic, the two powertrain options, and the checks worth running before an order is fixed.

Table of Contents

• 01. What Does an 80 Ton Rating Actually Buy You?
• 02. How Many Bucket Passes Should Fill a 45 m³ Body?
• 03. Why Does Material Density Decide Whether You Are Volume- or Weight-Limited?
• 04. Why Do Haul Road Gradients Decide the Real Payload?
• 05. Which Specification Sheet Numbers Constrain Output?
• 06. How Should You Choose Between the Weichai and Xichai Versions?
• 07. Where Does an 80 Ton Truck Sit Between 70 and 95 Ton Machines?
• 08. What Should Be Checked Before Signing a Truck Order?
• 09. How Do You Keep an 80 Ton Hauler Productive in Dust?
• 10. How Does Qingdao Pengcheng Glory Machinery Build the PX115MT?
• 11. Frequently Asked Questions
• 12. Contact and Project Support

What Does an 80 Ton Rating Actually Buy You?

The number on the badge is payload, not kerb weight. The PX115MT carries 80,000 kg of rock per trip, weighs 35,000 kg empty, and is rated to 115,000 kg gross. That means roughly 70 percent of every trip is material that can be sold, and 30 percent is the truck itself.

That ratio is the honest starting point for a cost per ton calculation. Fuel, tyres, brake life and haul-road wear all scale with gross weight, while revenue scales with payload. Two trucks quoting the same payload can sit more than a tonne of structure apart, and that difference compounds across a fleet over a year of double shifting.

Practical takeaway: Before comparing prices, compare payload divided by gross weight. Then compare the axle ratings that carry that ratio, because a light chassis is only an advantage if the axles and frame are rated for the duty.

How Many Bucket Passes Should Fill a 45 m³ Body?

The PX115MT body measures 6,350 x 3,550 x 2,000 mm with a flat capacity of 45 m³. Its side height and width set the loading target: a loader or excavator working at that height should complete the load in a predictable number of passes, not in a variable count that depends on how the operator feels that shift.

As illustration only: a 3.0 m³ bucket needs about 15 passes to reach 45 m³, a 4.0 m³ bucket around 11 to 12, and a 5.0 m³ bucket around 9. Uneven pass counts are one of the most common reasons a haul fleet loses time at the face, because the truck waits or leaves underloaded.

Important: Match the loader to the body and the loading height, not to the truck's nominal tonnage. An oversized bucket that cannot clear the side height safely adds cycle risk without adding payload.

Why Does Material Density Decide Whether You Are Volume- or Weight-Limited?

Two limits apply to every load: 45 m³ of space and 80,000 kg of payload. Which one binds first depends entirely on what is being hauled.

• Dense ore and waste rock in the region of 2.0 t/m³ and above will reach the 80,000 kg payload at roughly 40 m³, so the body is weight-limited and the operator must load by weight, not by eye.
• Lighter overburden and coal around 1.5 t/m³ fill the 45 m³ body at roughly 67 t, so the truck runs volume-limited and the payload rating is never fully used.
• Mixed benches change by the hour, which is why a load-weighing or payload management approach matters more on a wide-body truck than on a rigid haul truck with a fixed body.

The practical consequence is that a 45 m³ body is a good compromise for a mixed pit, but a dedicated operation should specify around its dominant material rather than accepting a general-purpose compromise.

Why Do Haul Road Gradients Decide the Real Payload?

Gradeability is usually read as a single brochure figure. In practice it defines the ramp the truck can climb fully loaded without the drivetrain becoming the bottleneck. The PX115MT is rated at 30 percent, with a maximum speed of 40 km/h and a 600 L steel fuel tank.

On a long ramp, the effect compounds: a truck working near its gradient limit spends more time in lower gears, which raises fuel burn per tonne and heat load in the transmission and cooling system. Pit design and truck selection should therefore be done together — a ramp a few percent steeper than the fleet can sustain comfortably will cost more over a year than the truck specification difference ever will.

The same section of the specification decides manoeuvring: a 12 m minimum turning radius, a 4,000 + 1,750 mm wheelbase and a 450 mm ground clearance set what the truck can do at a tight switchback and a dump edge.

Which Specification Sheet Numbers Constrain Output?

Most of a specification sheet is context. A handful of figures decide whether the machine fits a site. These are the ones to read first on an 80 ton wide-body truck.

Figures depend on configuration and site conditions. Always work from the current specification sheet for the exact unit being quoted.

How Should You Choose Between the Weichai and Xichai Versions?

The PX115MT is offered in two configurations that share the same chassis, body, axles and dimensions. Only the engine and transmission pair changes.

The decision is rarely about peak performance on paper. It is about which engine your workshop can service, which parts your local distributor stocks, and which emission configuration your destination market accepts. In a remote pit, a familiar engine with a two-day parts lead beats a theoretically better one with a three-week lead.

Where Does an 80 Ton Truck Sit Between 70 and 95 Ton Machines?

The same platform logic runs across the family: the PX105 at 70 ton payload, the PX115MT at 80 ton, and the PX136MT at 95 ton payload. Choosing between them is a question of loading fleet, ramp design and road width rather than of prestige.

• 70 ton class: suits smaller pits, tighter benches and loading tools that cannot fill a wider body efficiently.
• 80 ton class: the practical middle for mid-size open pits and quarries, where a 45 m³ body keeps a crusher fed without the tyre and road cost of a 95 ton platform.
• 95 ton class: justified when haul distances are long, the loading fleet is already sized for it, and the road network is built for the gross weight.

Mixing several classes in one pit is workable, but each class needs its own ramp and dump geometry. Standardising on one or two payload sizes usually beats a spread of three.

What Should Be Checked Before Signing a Truck Order?

A wide-body mining truck is a multi-year capital decision, and most of the risk sits in the interface between the machine and the site.

1. Material density: calculate whether the 45 m³ body or the 80,000 kg payload binds first for your ore and waste.
2. Loading tool match: confirm bucket size, pass count and loading height against the 3,550 mm body width and 2,000 mm side height.
3. Ramp design: check every loaded grade against the 30 percent rating, including temporary ramps.
4. Road width and turning: compare bench and switchback geometry with a 12 m turning radius and 2,792 / 2,606 mm track.
5. Powertrain serviceability: choose between the Weichai and Xichai versions on parts and workshop capability, not on brochure numbers.
6. Emission and market rules: confirm the engine configuration accepted in the destination market before the order is fixed.
7. Tyre availability: verify 16.00R25 supply and cost over the planned service life.
8. Fuel logistics: a 600 L tank sets the refuelling interval; remote pits may need a bowser.
9. Documentation: request specification sheet, operation manual, parts catalogue and warranty terms with the quotation.

How Do You Keep an 80 Ton Hauler Productive in Dust?

In a pit, availability is decided by filtration, cooling and lubrication long before structure becomes an issue. The PX115MT carries an oil bath air filter as standard, along with a heated body floor, a stone ejector, chassis protection, reinforced mirrors, LED side and tail lights, an electronic radiator, fuel preheating and electronic air conditioning.

• Service the oil bath filter on schedule; dust ingress shows up as power loss and fuel penalty before it shows as a failure.
• Keep the electronic radiator and charge-air cooler clean, especially in dry seasons when dust load builds faster than the service interval suggests.
• Use the heated body floor where wet or frozen material tends to stick and unload slowly.
• Check the stone ejector and chassis protection for damage; both protect the frame from carry-back and impact.
• Inspect the oil-gas front spring and rear leaf springs for leakage or cracked leaves at every shift inspection.
• Watch brake performance on long descents; the exhaust brake reduces reliance on the service brakes.
• Keep per-unit records of fuel, tyres and downtime so cost per ton is visible month by month.

Operator feedback matters: a change in steering effort, suspension behaviour or exhaust brake response is usually reported by the driver first. Treat it as maintenance data.

How Does Qingdao Pengcheng Glory Machinery Build the PX115MT?

Qingdao Pengcheng Glory Machinery Co., Ltd. supplies the PX115MT as an 80 ton payload off-road mining dump truck on a three-axle wide-body chassis, intended for open-pit metal and coal mines, quarries, cement plants and large earthworks.

The rest of the range can be reviewed on the mining truck category page.

Frequently Asked Questions

1. What does the 80 ton rating mean on the PX115MT?

It is rated payload. The truck carries 80,000 kg of material, weighs 35,000 kg empty, and runs at a 115,000 kg rated total weight.

2. How many bucket passes fill the body?

At 45 m³ flat capacity, a 3.0 m³ bucket needs about 15 passes, a 4.0 m³ bucket around 11 to 12, and a 5.0 m³ bucket around 9. Actual counts depend on material, bucket fill factor and operator practice.

3. What gradient can it climb when fully loaded?

The rated maximum gradeability is 30 percent. Permanent and temporary ramps should be designed inside that figure, with margin for wet or loose conditions.

4. Weichai or Xichai — which version should I order?

Both share the same chassis and body. The Weichai version pairs WP14TG765E304 with a FAST 8DS260 transmission; the Xichai version pairs CA6DX3-77GCG31 with a CA8TAX300F. Choose on local parts supply, workshop familiarity and the emission rules of your market.

5. What body does it use?

A 6,350 x 3,550 x 2,000 mm mining square box with a 16 mm Q355 bottom plate, 12 mm Q355 side plates and a Hyva 202 front-lift cylinder.

6. What should I send when requesting a quotation?

Material type and density, haul distance and ramp gradients, bench and switchback dimensions, required payload, preferred engine, tyre preference, destination market and emission requirements, plus delivery site and schedule.

Planning Your Next Haulage Configuration?

Choosing between 70, 80 and 95 ton trucks starts with the pit layout, the material and the loading fleet, not with the badge. If you are specifying an off-road mining dump truck, Qingdao Pengcheng Glory Machinery Co., Ltd. can review the configuration against your actual working conditions.

Send us your material density, haul profile, bench dimensions and destination market, and we will help confirm whether the PX115MT fits the duty. Contact us.