5 Signs Your Spare Parts Need a Replacement (And How to Avoid Costly Breakdowns)
Detecting wear and tear on your spare parts early can prevent costly breakdowns and downtime. In this article, we’ll tell you the 5 clearest signs that it’s time for an urgent replacement.
When is it time to change your spare parts? These are the key signs
In the construction and public works sector, time is money. When a machine is stopped due to a defective spare part, the costs can quickly multiply: lost hours, delivery delays, penalties, idle labor… all due to a failure to act in a timely manner.
At Makitrucks, with years of experience in the sale and rental of machinery, spare parts, and implements, we know how to identify when a part needs urgent replacement. In this article, we explain how to detect this before it’s too late.
1. Poor performance or irregular machine behavior
One of the most common—and potentially dangerous—signs of heavy machinery use is a progressive loss of performance. This isn’t always a sudden failure: in many cases, the machine continues to operate, but with reduced efficiency, precision, or power, increasing the risk of more serious breakdowns if timely action isn’t taken.
How does this loss of performance manifest itself?
Reduced tractive effort: The machine skids more than usual or loses grip even on terrain where it previously handled easily. This symptom is typical of worn or improperly tensioned rubber tracks.
Slower travel or turning speed: If the machine takes longer to move, it may be due to defective final drives, insufficient hydraulic pressure, or internal brakes that do not release properly.
Lack of response from hydraulic arms: Arm, bucket, or dipper movements become slow or erratic, indicating a possible problem with hydraulic valves, pumps, or accumulators.
Difficulty operating on familiar terrain: The machine seems to “struggle” more than usual under normal working conditions, which is indicative of internal resistance caused by faulty spare parts.
Why does this problem occur?
Poor performance is often related to the progressive wear of key components:
- Rubber tracks: When they lose their lugs or become deformed, this causes uneven traction, vibrations, and loss of control. The engine must also work harder to compensate.
- Final drives: These are responsible for transmitting power to the wheels or tracks. If they have leaks, worn gears, or bearing failures, power and speed are lost.
- Hydraulic pumps: If they are damaged, they generate insufficient pressure, causing all hydraulic systems (lifting, turning, extension) to respond poorly or with a delay.
- Implements with worn bearings or axles: Their malfunction generates unexpected resistance when working with a load.
What consequences can ignoring this symptom have?
- Increased fuel consumption: The engine is forced to work beyond its capacity.
- Accelerated wear of other parts: By stressing components, the entire system is damaged.
- Unplanned shutdowns: A machine operating under constant stress will eventually break down.
- Risks to the operator: An unexpected response from the machine can endanger the worker.
What to do if you detect this sign?
- Perform a basic visual and functional inspection (tracks, hydraulic oil levels, noise, leaks).
- Consult a trained technician to assess the condition of the final drives, implements, and hydraulic system.
- Replace damaged components as soon as possible. At
- Makitrucks, we have compatible and durable MTKS spare parts for each of these situations.
Real case:
2. Abnormal noises, vibrations or overheating
A machine that begins to make strange noises, vibrates abnormally, or heats up more than usual is sending a clear signal: something is not working properly internally. These symptoms are often underestimated, but ignoring them can lead to critical breakdowns that completely shut down the machine.
What kind of noises are worrying?
Mechanical noises always have a cause. Learning to recognize them is key to preventing further damage. Here are the most common ones and what they could mean:
- Constant humming or whistling
→ This may be due to a worn hydraulic pump, a partially clogged filter, or cavitation in the hydraulic circuit. - Metallic or high-pitched squealing
→ This usually indicates dry bearings, damaged bearings, or friction between moving parts without adequate lubrication. - Rhythmic or intermittent knocking
→ This may be due to a poorly adjusted track, a damaged link, or a loose drive chain. - Generalized vibration in the cab or structure
→ This suggests an imbalance in the undercarriage, driveshaft, or implements.
Practical advice:
What does overheating mean?
When a machine runs hotter than usual, even under normal load, it’s not always the engine’s fault. Some defective parts or systems can generate excessive heat:
- Friction in final drives or bearings that don’t rotate freely.
- Leaks in the hydraulic system that put more strain on the pump.
- Internal oil leaks that raise the temperature of the circuits.
This excess temperature accelerates the wear of oils, seals, and metal components, and can even end up affecting the machine’s electronics.
What parts are usually behind these symptoms?
- Final drives: If their bearings or gears are damaged, they generate friction, noise, and vibrations.
- Hydraulic pumps and motors: They can overheat and transmit vibrations to the entire structure.
- Implement bearings: Their poor condition directly impacts the precision and performance of the hydraulic system.
- Tracks and wheels: A track with incorrect tension or a flat spot can generate constant vibration.
What happens if you don't fix it in time?
- Bearings seize and lock, causing damage to other parts.
- Seals and gaskets break, causing internal leaks.
- This increases the risk of complete component failure, rendering the machine out of service.
- Structural damage may occur due to prolonged vibration or safety failures.
What to do if you detect noise or overheating?
- Stop the machine immediately if the noise or vibration is abnormal.
- Visually check for leaks, track tension, and oil levels.
- Consult a technician or request a specialized inspection.
- Replace worn components. At Makitrucks, we have:
- Compatible bearings, tracks, and final drives.
- Hydraulic spare parts.
- Free, no-obligation technical advice.
3. Visual wear or deformations on external parts
Often, the machine speaks to us with the naked eye. There’s no need to wait for it to fail or make a bad noise: the signs of wear or damage are there, visible on the external components. Ignoring them is not only a mistake, but can also result in a costly breakdown or even a work-related accident.
Detecting these symptoms early allows you to schedule maintenance in advance and replace spare parts before they cause a bigger problem.
What aspects should you check visually?
Visual inspection should be part of your daily or weekly maintenance routine. Some of the most critical points to look for include:
Rubber Tracks
- Worn lugs: When they are flat or have deformed edges, traction is reduced.
- Lateral cracks: Indicate that the rubber has lost flexibility and strength.
- Layer separation: If the rubber begins to separate from the internal reinforcement, the track is on the verge of failure.
- Misalignment: If the track does not follow its natural path, there may be a deformation or a problem with the tensioning system.
Hydraulic Implements
- Cracks or cracks in the steel.
- Loss of welds at joints.
- Burnt or discolored paint, a sign of overheating or excessive friction.
- Asymmetrical wear on blades, cups, or buckets, which can cause imbalance during operation.
Final drives and axles
- Visible clearances in the coupling with the chassis.
- Advanced rust compromising the structure.
- Seals cracked due to heat or pressure.
Makitrucks Tip:
Why is it so important to detect external wear?
Deteriorated spare parts not only affect performance, but also:
- They can damage other components with which they interact.
- They increase the risk of sudden failure under load.
- They hinder precise maneuvering, increasing the risk to the operator.
- They complicate maintenance if not replaced in a timely manner (for example, a broken track can become trapped or damage the chassis).
¿Qué ofrece Makitrucks para estos casos?
En Makitrucks te ayudamos a identificar el nivel de desgaste de tus componentes y te ofrecemos:
Orugas de goma MTKS, con refuerzo interno de acero y gran resistencia al desgaste.- Implementos y repuestos compatibles, diseñados para una larga vida útil.
Soporte técnico para evaluar si tus piezas deben cambiarse o pueden seguir operando con garantías.
4. Oil, hydraulic or fuel leaks
Fluid leaks in a machine aren’t just an annoyance or a sign of wear: they’re a critical sign that something is wrong and can lead to a major breakdown if not addressed quickly. Furthermore, in public or private construction environments, a leak can pose environmental risks, fines, and safety issues.
Heavy machinery depends on the proper functioning of its hydraulic, lubrication, and, in some cases, pressurized fuel systems. When one of these systems leaks, the entire equipment is at risk.
What does Makitrucks offer for these cases?
At Makitrucks, we help you identify the level of wear on your components and offer:
- MTKS rubber tracks, with internal steel reinforcement and high wear resistance.
- Compatible implements and spare parts, designed for a long service life.
- Technical support to assess whether your parts need to be replaced or can continue operating with warranty.
What types of leaks are most common?
- Hydraulic Oil Leaks
- These are detected by stains on the floor, residue buildup near fittings, or pressure loss during movement.
- They are usually caused by:
- Deteriorated seals or gaskets.
- Loose or poorly sealed connections.
- Overpressure damage to hoses.
2. Lubricant leaks (engine oil or gears)
- These appear in areas of the crankcase, final drives, or transmission box.
- They can be caused by:
- Damaged seals.
- Excessive pressure due to lack of ventilation.
- Wear in metal housings that no longer allow a proper seal.
3. Fuel Leaks
- More dangerous due to the risk of fire or contamination.
- They can be caused by:
- Cracked hoses.
- Cracked caps or tanks.
- Loose or defective injectors.
A leak is not just a loss of fluid; it is a direct warning of a functional failure. In addition, it can cause the machine to operate at inadequate temperatures or without adequate lubrication, causing serious internal damage.
Consequences of ignoring a leak
Risk of fire or explosion in the event of fuel leaks.
Environmental pollution from uncontrolled spills (punishable by regulations).
Accelerated component wear due to lack of lubrication or hydraulic pressure.
Unplanned machinery shutdowns at the worst possible time during the project.
Additional repair costs, as a leak can affect other systems if left unattended.
How to identify a leak?
Visual Inspection: Inspect the underside of the machine daily, including areas near the hydraulic actuators, final drives, and fuel pump.
Observe operating pressure: A drop in hydraulic arm response or movement can be a sign of fluid loss.
Odor or Stains: The smell of burnt oil or fuel and persistent stains on engine or cylinder areas are clear signs.
Using tissues or absorbent towels under critical components overnight is an easy way to detect microleaks the next day.
What to do if you detect a leak?
- Stop the machine to prevent further damage.
- Clean the area to locate the exact source of the leak.
- Evaluate whether it’s a gasket, connector, or hose, and replace the component as soon as possible.
- Do not reuse seals or use pressure-sealing tape: this is a temporary solution that can make the situation worse.
- Consult a trusted professional or service provider.
How does Makitrucks help you?
At Makitrucks, we have everything you need to keep your machinery leak-free and operating safely:
- High-quality gaskets, seals, and hydraulic repair kits.
Pressure- and temperature-resistant pipes, hoses, and fittings.
Personalized technical support to identify the leak and recommend the correct part.
Fast shipping so you don’t waste time on site.
5. Unexpected increase in fuel consumption or electrical failures
When a machine starts consuming more fuel than usual or experiences intermittent failures in its electrical systems, most operators first think of the engine or electronic system. But the truth is that the cause often lies in defective parts that are causing additional strain on the machinery, or in faulty connections that directly impact performance and efficiency.
Why is fuel consumption increasing?
The engine of any public works equipment is designed to operate within an optimal torque range. When the system encounters resistance—whether from friction, unnecessary weight, or additional hydraulic stress—it requires more energy to achieve the same result. This directly translates into increased fuel consumption.
Common causes related to defective spare parts:
- Damaged bearings
→ These increase friction on the axles, forcing the engine to work with greater power. - Poorly tensioned or deformed tracks
→ These generate resistance to movement, causing the machine to consume more fuel to move. - Damaged or loose implements
→ These cause loss of efficiency when loading, vibrations, and bouncing, which require more effort during each maneuver. - Clogged air or fuel filters
→ These cause incomplete combustion and loss of power, forcing the engine to overwork.
In heavy machinery, a 10% increase in fuel consumption can cost thousands of euros per year if left unchecked.
What types of electrical faults can occur?
The engine of any public works equipment is designed to operate within an optimal torque range. When the system encounters resistance—whether from friction, unnecessary weight, or additional hydraulic stress—it requires more energy to achieve the same result. This directly translates into increased fuel consumption.
Common causes related to defective spare parts:
- Damaged bearings
→ These increase friction on the axles, forcing the engine to work with greater power. - Poorly tensioned or deformed tracks
→ These generate resistance to movement, causing the machine to consume more fuel to move. - Damaged or loose implements
→ These cause loss of efficiency when loading, vibrations, and bouncing, which require more effort during each maneuver. - Clogged air or fuel filters
→ These cause incomplete combustion and loss of power, forcing the engine to overwork.
In heavy machinery, a 10% increase in fuel consumption can cost thousands of euros per year if left unchecked.
Consequences of ignoring these symptoms
Premature motor wear due to continuous overload.
Risk of critical hydraulic system failure due to operating without adequate pressure.
Diagnostic errors due to failure to correctly detect the source of electrical faults.
Increased operating costs, both in fuel and unplanned maintenance.
Instability or loss of precision during operation, which can compromise operator safety.
What should you do if you notice these signs?
- Compare current fuel consumption with previous records, if available.
- Perform a road inspection: tracks, axles, final drives, and filters.
- Check the condition of the air, fuel, and hydraulic filters.
- Check electrical connections: terminals, fuses, connectors.
Consult a specialized technician or your trusted supplier.
How does Makitrucks help you?
At Makitrucks, we work every day to offer you solutions that optimize the performance of your machinery:
- Filters, bearings, tracks, and electrical components compatible with most brands.
Assistance to diagnose which component may be failing.
Express shipping to minimize downtime.- Free technical support to help you reduce costs and extend the life of your equipment.
Bonus: How often should you change spare parts?
| Tipo de Repuesto | Revisión recomendada | Sustitución sugerida |
| Orugas de goma | Cada 250 h | Entre 1.200 y 2.000 h |
| Mandos finales | Cada 500 h | Según desgaste o fugas |
| Filtros hidráulicos | Cada 200 h | Cada 500-800 h |
| Sellos y retenes | Visual semanal | Cuando presenten fuga |
| Rodamientos y bujes | Cada 1.000 h | Si hay holgura o vibración |
Do you have questions? Do you need technical advice?
At Makitrucks, we’re here to help. Whether you’re a professional or a business, we offer free advice to help you find the spare part you need and extend the life of your machinery.
Visit our online store at www.mtks.es or contact our technical team for more information.