6 common "diseases" on trucks and how to fix them

• 1. Steering wheel shaking
  

• Reason:Due to the wheel rim being bent and also possibly due to balance, loss of bolts, nuts of the steering wheel, steering ladder... or due to dirt that can contaminate the brakes causing the steering wheel to vibrate. The brake disc or drum is out of balance. This phenomenon is often explained by the fact that these parts are worn and have too much rust, dirt... causing uneven rotation.

• How to fix:In case the brake disc is bent or warped, a thin layer of metal should be applied to the surface to help reduce steering wheel vibration when braking.

• If the vibration is due to missing screws, it is necessary to replace new screws in the steering system and maintain the entire steering system, pump grease and tighten the screws... In case the brake disc is too warped or has many scratches, it is best to replace the brake disc with a new one.

• 2. Engine starts fine but won't start

• Reason:The engine starts fine but the engine won't start, it could be due to hfuel;clogged fuel filter;fuel mixed with air

• How to fix:Check and add fuel to the fuel tank; tor fuel filter core; xLet the air out of the fuel system.

• 3. Engine overheating

• Although this is a small error, it is quite important because it affects the main engine and the valves, pressure, gaskets, and piston rings. To avoid this situation, you should regularly check the vehicle and engine before going, or at least once a week.

• Reason:Because of mThe outside of the radiator is dirty;coolant; kclogged drain; vThe thermostat is broken.

• How to fix:Clean the radiator;Add water and check for leaks; pwater tank cleaning; kcheck thermostat

• 4. Engine consumes excessive fuel

Reason: Excessive fuel consumption by the engine can be caused by faulty fuel or damaged vehicle parts, specifically: poor quality diesel or higher than normal engine oil level, it can also be caused by fuel leaking from the fuel pipe or by a problem with the high pressure pump or steam system.

How to fix:Need to check and replace fuel; readjust the machine's high pressure pump; check the engine's operating pressure at the end of the compression stroke.

5. Brake pedal feels heavy

Today's braking systems often use vacuum assist to reduce the effort the driver has to put on the brakes.

Reason:The usual reason is that the brake booster has failed; the air leak has not created a large enough pressure differential to support the force from the pedal. The driver can still brake the vehicle with more force; thereforeThe oil line is clogged, the oil pressure increases but cannot be transmitted to the brake mechanism.

How to fix:In this case, even if you try to brake hard, it will not be effective or the effectiveness will be greatly reduced; you should take the car to the garage immediately for repair.

6. Brake fully but the car does not stop

• This is a common "disease" with vehicles equipped with drum brakes.

• Reason:bent master cylinder piston, lack of oil or air in the brake system, worn brake pads...

• How to fix:Need to bring to the garage to adjust the bent main pistons or replace new brake pads. If the brake fluid is low, add brake fluid according to the type recommended by the manufacturer for each vehicle model (in Vietnam, the 3 most popular types of brake fluid for drum brakes are: DOT3, DOT4 and DOT5).