The decision to buy a used MAZ dump truck 20 ton often becomes a key moment for starting or expanding a business in the field of cargo transportation. Belarusian equipment is deservedly in demand due to its maintainability, availability of spare parts and ability to work in harsh climatic conditions. However, the used truck market is crowded with offers with different operating histories, which requires great care from the buyer.
The wrong choice can lead to long downtime and unforeseen financial investments, which will negate the entire economic benefit of the purchase. It is important to understand that lifting capacity 20 tons is a serious load on all components of the car, and the condition of the frame or engine plays a critical role here. In this article we will look at what to look for first and how to avoid becoming a victim of unscrupulous sellers.
Saving on initial diagnostics often results in the purchase of a problematic asset, which will generate losses instead of profits. A competent approach to the search allows you to find a car that will last for many years, maintaining its residual value. Let's define the main criteria that will help you make an informed decision.
⚠️ Attention: Never complete a transaction or transfer an advance payment without first personally checking the technical condition of the car on a lift or in a specialized service center.
Review of popular MAZ models for 20-ton transportation
The market for used MAZ dump trucks is represented by several generations of equipment, each of which has its own characteristics. The most common heavy duty platform is the family MAZ-5551 and its more modern modifications of the series MAZ-5550. These vehicles have proven to be workhorses capable of withstanding overloads, although cabin comfort in older models leaves much to be desired.
Newer models such as MAZ-6501 or Techno series, offer improved ergonomics and are often equipped with standard engines Euro 4 or Euro 5. Buying a newer model year with a modern gearbox, e.g. Fast Gear or ZF, can significantly reduce driver fatigue and increase work efficiency on the line. However, the cost of servicing such units will be higher than that of classic YaMZ manual transmissions.
When choosing a specific modification, it is important to consider the operating conditions. For work in a quarry with aggressive environments, models with a reinforced frame and simple electrics are better suited. If you have to work on urban sites or route transportation of bulk cargo, you should pay attention to vehicles with a more comfortable cabin and better sound insulation.
- 🚛 MAZ-5551: Classic model, time-tested, simple design, but low comfort.
- 🚛 MAZ-5550/5551C9: Modern design, improved aerodynamics, possibility of installing a ZF gearbox.
- 🚛 MAZ-6501: Increased load capacity, reinforced chassis, oriented towards difficult conditions.
Detailed check of engine and transmission
The heart of any truck is the engine, and in the case of MAZ, these are most often units from the Yaroslavl Motor Plant. Before purchasing, be sure to perform a cold start: the engine should start confidently, without prolonged rotation by the starter. The presence of bluish or black smoke from the exhaust pipe under load indicates problems with fuel equipment or piston group.
Pay special attention to the cooling system. Overheating is the main enemy of diesel engines, and traces of antifreeze in the oil or the presence of an oil emulsion on the dipstick are fatal signs of a cylinder head gasket failure or a crack in the head. Check the turbine for shaft play and oil in the intercooler pipes, which may indicate worn seals.
The secret to checking the turbine
Remove the pipe from the turbine inlet and shake the shaft with your finger. Backlash in the radial direction is unacceptable, axial play should be minimal. The presence of oil on the compressor blades indicates wear of the turbine oil scraper rings.
The transmission of a dump truck experiences enormous loads, especially when working in quarries. During a test drive, listen to the operation of the gearbox: shifting should be clear, without crunching or knocking out gears under load. For models with a manual transmission, the condition of the clutch is important; If the pedal has a lot of free play or there is a burning smell, the disc will soon need to be replaced.
⚠️ Attention: If the seller claims that the engine has “just undergone capital testing,” ask for receipts for spare parts and work orders from the service. Lack of paperwork often means that only the gaskets and rings were replaced, while the crankshaft and bearings were left in poor condition.
Diagnostics of body, frame and hydraulics
The dump truck is the main working part of the machine, and its condition directly affects safety. First, inspect the bucket for cracks, especially in the corners and where it attaches to the frame. The presence of boiled spots (“bugs”) indicates past repairs that could have been carried out in violation of technology, which reduces the overall structural strength.
The frame carries the entire mass of the load, so any traces of welding, especially artisanal ones, should alert you. Cracks in the side members, especially in the rear, are a critical defect, the repair of which requires overwelding with reinforcement, and in some cases the frame can no longer be considered reliable. Check the condition of the spring ladders and hinge pins.
The hydraulic body lifting system should operate smoothly, without jerking or extraneous sounds. Leaks from under the hydraulic cylinder or pump rod indicate wear of the seals. Also check the operation of the tipper mechanism: the body should rise and fall evenly, without distortion, which could indicate problems with weight distribution or geometry.
☑️ Body and frame checklist
Chassis and braking system
For a 20-ton dump truck, the condition of the undercarriage is critical. Springs should not have broken sheets, and shock absorbers should dampen vibrations and not just dangle. Play in the steering knuckle pins is a common problem for MAZ vehicles, leading to unstable behavior on the highway and rapid tire wear. Check the presence of lubricant in hub units and no oil leaks.
The braking system must provide effective braking when fully loaded. Check the operation of ABS (if provided by the modification) and the condition of the brake chambers. Cracks in rubber elements or air leaks are unacceptable. The wear of brake drums and pads can be assessed visually through inspection holes or by removing the wheels.
It is also worth paying attention to the condition of the cardan shafts and crosspieces. Play in the driveline causes vibrations that damage the outboard bearing and can cause the shaft to break off while in motion. A visual inspection for missing balance weights will help assess the quality of previous repairs.
Financial aspects and payback calculation
Before you buy a used MAZ dump truck 20 ton, you need to conduct a thorough financial analysis. Market price is just the tip of the iceberg; the real cost consists of the purchase price, restoration costs and ongoing expenses. Older models may be cheap, but they are fuel consumption and the frequency of repairs can eat up all the profit in one season.
When calculating the payback, take into account the cost of spare parts. Spare parts for MAZ vehicles are available and relatively cheap, which is a huge advantage compared to their European counterparts. However, if you buy a model with an imported engine (such as Weichai or Cummins), the cost of original filters and fuel system components will be higher.
| Parameter | MAZ-5551 (Old) | MAZ-5550 (Medium) | MAZ-6501 (New) |
|---|---|---|---|
| Approximate price (cu) | 15 000 - 25 000 | 30 000 - 45 000 | 50 000+ |
| Fuel consumption (l/100km) | 35 - 45 | 30 - 38 | 28 - 34 |
| Resource before overhaul | Low / Requires investment | Medium | High |
| Liquidity | Low | High | Average |
Buying a car in the middle price segment often turns out to be more profitable than the cheapest one, since it allows you to start working right away without investing in repairs.
Legal purity and transaction execution
Purchasing a commercial vehicle requires a thorough legal background check. Make sure that the car is not subject to registration restrictions, is not pledged to the bank and is not listed as stolen. The check can be carried out through the official registers of the traffic police and the database of pledges of movable property.
It is important to check the VIN numbers on the frame, engine and documents. Any discrepancies, traces of alternating numbers or unreadable signs may lead to refusal of registration and confiscation of equipment. If the seller represents the interests of the company, check the authority of the person signing the agreement through an extract from the Unified State Register of Legal Entities.
The purchase and sale agreement must contain complete details of the parties, an accurate description of the vehicle (VIN, model, year of manufacture, color) and price. State that the seller guarantees that there are no undisclosed hidden defects, although in business-to-business (B2B) transactions this clause is often excluded, making a pre-signing inspection even more important.
When completing a transaction, be sure to make copies of the vehicle’s and owner’s passports, and also save all correspondence and advertisements to which you responded. This may be useful in court if fraud is discovered.
⚠️ Attention: Beware of schemes where you are asked to underestimate the real cost of a car in a purchase and sale agreement to “reduce taxes.” In the event of termination of the transaction or legal proceedings, you will be returned only the amount specified in the document.
Frequently asked questions (FAQ)
What is the engine life of a used MAZ before major repairs?
The resource depends on the engine model and operating conditions. For naturally aspirated YaMZ-238 it can be 800,000 - 1,000,000 km, for turbocharged versions - 600,000 - 800,000 km. However, when working in difficult quarry conditions with overloads, the resource can be reduced to 300,000 - 400,000 km.
Is it worth buying a MAZ with a Euro-4/5 engine to work in the region?
Purchasing such equipment is advisable if you have access to high-quality fuel (Euro-5) and the ability to maintain a complex exhaust gas aftertreatment system (AdBlue, particulate filters). In remote areas with low quality diesel fuel, it is better to choose proven Euro-2 or Euro-3, which is less sensitive to fuel quality.
What are the most common breakdowns of MAZ dump trucks?
The most common problems include: failure of electronic engine management system sensors, wear of front suspension pins and bushings, body lift hydraulic leaks and problems with turbochargers due to untimely oil changes.
How to check if a dump truck has been in a serious accident?
Pay attention to the gaps between the body and the cabin, the symmetry of the installation of headlights and bumpers. Check the thickness of the paintwork with a thickness gauge - the presence of putty on the side members or pillars of the cabin will indicate repairs after an impact. Also inspect the bolt connections of the frame: if the bolts are painted over or have traces of fresh unscrewing without signs of use, the frame could be straightened.