Owning a Sinotruk Howo truck means you have a powerful vehicle, but keeping it in good condition requires more than just fuel and long drives. Regular maintenance ensures your truck runs well, lasts longer, and avoids expensive breakdowns. Simple tasks like oil changes and daily checks can save you both time and money. However, there’s a common mistake many truck owners miss—are you making it too?
Regular Maintenance Schedule of Sinotruk howo
To keep your SINOTRUK Howo truck running smoothly and on the road for miles, regular maintenance is key. Think of it as giving your truck some care. Here’s a simple guide to the important service intervals and tasks that will keep it in top shape.
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Recommended Maintenance Intervals
First-time Check: After 1,000-1,500 km or 30-50 hours
Routine Check (P): Every 5,000 km or 150 hours
1st-Grade Service (WD1): Every 10,000 km or 300 hours
2nd-Grade Service (WD2): Every 20,000 km or 600 hours
3rd-Grade Service (WD3): Every 40,000 km or 1,200 hours
4th-Grade Service (WD4): Every 80,000 km or 2,400 hours
Key Maintenance Tasks
Engine Oil & Filter
Change engine oil every 10,000 km or 6 months
Replace fuel filter or filter element when changing the diesel oil
Air & Cooling System
Clean air filter dust cup every 5,000 km
Replace air filter safety core after cleaning the main filter 5 times
Check coolant level and top it up if needed at every service
Replace coolant every 24 months
Chassis & Lubrication
Lubricate chassis components (leaf spring pins, shock absorbers, brake camshafts) every 10,000 km
Perform rust-proofing treatment of the driver’s cab every 12 months
Engine & Valve Clearance
Check and adjust valve clearance every 20,000 km
Special Considerations
Trucks used in harsh environments or those that frequently carry heavy loads should have shorter maintenance intervals.
No matter how far you’ve driven, make sure to change the oil at least twice a year to avoid unnecessary wear and tear.
Following this schedule helps your SINOTRUK HOWO truck run smoothly and stay in top condition.
Expert Opinion:
“Regular maintenance and careful tracking of a truck’s operational data help improve performance and extend its lifespan. Sticking to maintenance schedules lowers the risk of breakdowns, improves fuel efficiency, and reduces overall costs. Fleet managers should make sure all maintenance tasks are completed on time. Addressing wear and tear early prevents costly repairs later.”
— John Doe, Vehicle Maintenance Expert and Fleet Management Consultant
Daily Checks of sinotruk howo
It’s important to do daily checks on your Sinotruk HOWO truck. This will help keep you safe, reduce maintenance costs, and prevent unexpected breakdowns. Regular checks can also extend the truck’s lifespan and improve its performance.
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Tire Pressure and Condition
Check the inflation, wear, and any visible damage to the tires.
Keeping the right tire pressure boosts fuel efficiency and lowers the risk of blowouts.
Fluid Levels
Engine oil – Keeps the engine running smoothly and prevents damage.
Coolant – Helps control the engine’s temperature and avoid overheating.
Brake fluid – Crucial for effective braking.
Power steering fluid – Ensures easy and responsive steering.
Windshield washer fluid – Keeps the windshield clean for better visibility.
Lights and Signals
Check that all headlights, brake lights, turn signals, and hazard lights work properly.
Make sure the horn is in good working condition.
Brakes
Test the parking brake and service brakes to ensure they are working well.
Listen for strange noises or grinding sounds when braking.
Check how the brake pedal feels—it should neither be too soft nor too hard.
Leaks
Check under the truck for any oil, coolant, brake fluid, or fuel leaks.
Fix any leaks right away to avoid mechanical problems.
Windshield and Wipers
Clean the windshield for clear visibility.
Check the wiper blades for cracks or damage. Replace them if needed.
Mirrors and Windows
Adjust and clean all mirrors for a clear view of surrounding traffic.
Check that windows are free from cracks or obstructions.
Air Filter Indicator
Check the air filter indicator to see if the filter needs cleaning or replacement.
A clogged air filter reduces fuel efficiency and engine performance.
Belts and Hoses
Visually inspect for cracks, fraying, or looseness.
Worn belts or hoses can lead to engine overheating or loss of power.
Steering System
Turn the steering wheel to check for excessive play or strange noises.
Proper steering response is vital for safe driving.
Example Daily Checklist
Tire pressure: Front psi, Rear psi
Engine oil level: Full / Low / Empty
Coolant level: Full / Low / Empty
Brake fluid: Full / Low / Empty
Lights functioning: Yes / No
Windshield washer fluid: Full / Low / Empty
Air filter indicator: Green / Red
Visible leaks: Yes / No
Unusual noises: Yes / No
Trucks with regular daily inspections have 30% fewer breakdowns and 20% lower maintenance costs over their lifetime. Be sure to do these checks before starting your first trip to ensure safety and efficiency.
Engine Maintenance of sinotruk howo
Maintaining the engine of your Sinotruk Howo truck is important for performance and durability. Regular maintenance helps your engine run smoothly and reduces the chances of unexpected breakdowns. Here are the key maintenance steps you should follow.
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Oil Changes
Frequency: Change the engine oil every 10,000 km for road vehicles, or 5,000 km for off-road vehicles.
Oil Type: Use CF-4 grade oil for Euro 2 engines or CH-4 grade oil for Euro 3 engines.
Fuel System
Pre-filter: Clean or replace the fuel pre-filter every 10,000 km.
Fuel Filter: Replace the fuel filter element each time you change the diesel oil.
Air Filter
Air Filter Indicator: Check the air filter maintenance indicator regularly.
Cleaning: Clean the dust cup of the air filter (for non-automatic exhaust types) every 5,000 km.
Safety Filter Core: After cleaning the main filter core five times, replace the safety filter core.
Coolant
Coolant Check: Check the coolant volume every 5,000 km and top it up if needed.
Replacement: Replace the coolant every 24 months or as recommended by the manufacturer.
Valve Clearance
Adjustment: Check and adjust the valve clearance every 10,000 km.
Turbocharger
Bearing Clearance: Inspect the bearing clearance of the turbocharger every 40,000 km.
Belts and Hoses
Belts: Check the tightness and wear of belts every month.
Hoses and Clamps: Tighten cooling pipe clamps and inlet air pipe connections every 10,000 km.
Idling and Temperature
Idling: After starting the engine, let it idle for 2-3 minutes before driving.
Engine Temperature: Don’t run the engine at high speed or heavy load if the coolant temperature is below 60°C.
Oil Pressure
Pressure Check: At idling, ensure the oil pressure is between 270-320 kPa.
First Check
Perform a comprehensive check after the first 1,500-2,000 km of operation.
Following these steps will help keep your Sinotruk Howo truck in good condition, reduce the risk of expensive repairs, and improve its performance. Always refer to the manufacturer’s manual for more detailed maintenance schedules.https://www.youtube.com/watch?v=_Ussbd-Yit4
Transmission and Axle Maintenance of sinotruk howo
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Transmission Maintenance
Use Grade CF-4 15W/40 engine oil for proper lubrication.
Check the oil level regularly, making sure it reaches the observation slit on the transmission box.
Oil capacity: 12L for HW18710 transmission (12.5L if equipped with a power take-off).
Change the transmission oil within the first 2,000-5,000 km for new transmissions.
Check oil level and inspect for leaks every 10,000 km.
Replace the lubricant every 50,000 km to keep the performance up.
Make sure the transmission does not exceed a maximum working temperature of 120°C.
Keep the working inclination angle below 15° to avoid damage.
Axle Maintenance
Perform routine maintenance every 15,000 km or 6 months.
Change the lubricating oil after the first 5,000 km of use.
Check oil levels every 5,000 km or once a month.
Replace axle lubricating oil every 150,000 km or once per year.
Use GL-5 85W-90 gear oil for proper lubrication.
Oil capacity: 23L for the middle axle, 20.5L for the rear axle.
Clean the breather plug often to ensure proper ventilation.
Inspect oil filler and drain plugs for leaks.
Check the tightness of half axle bolts to prevent loosening.
Apply 2# lithium base grease to grease nipples every 2,000 km for smooth operation.
Key Maintenance Tasks
Replace transmission hydraulic oil at least once a year.
Check the function of the transmission oil thermometer.
Inspect the throttle sensor for accuracy and efficiency.
Watch the transmission fault indicator light to detect early issues.
Retighten transmission shaft bolts at 1,200 km, then every 3,000 km to avoid loosening.
Clean the axle ventilation device to prevent blockages and overheating.
During Class-2 maintenance, check and adjust hub bearing clearance.
Replace hub lubricating grease as recommended.
Follow manufacturer guidelines and adjust maintenance intervals based on driving conditions to keep the vehicle running smoothly.
Steering System Maintenance of sinotruk howo
To keep the steering system of your Sinotruk HOWO truck in good condition, regular inspections and care are important. Here are the steps you should follow to ensure it works well for a long time.
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Regular Hydraulic Oil Checks
Check the hydraulic oil level in the tank regularly. Make sure it’s at the right level shown on the dipstick.
Clean the oil reservoir and nearby area before checking to avoid contamination.
Oil Replacement and Cleaning
Replace the hydraulic oil after the first 2,500 km, and then every 20,000 km or 6 months.
Clean the cartridge in the reservoir with each oil change.
Check the oil level and cleanliness every month.
Oil Change Process
Jack up the front axle.
Remove the return pipe from the steering gear.
Run the engine for 10 seconds, turning the wheel to drain the oil.
Clean the reservoir, filters, and other parts thoroughly.
Refill with fresh oil while running the engine and turning the wheel.
Add oil until the level is stable and no bubbles are visible.
Inspect Steering Components
Check the clearance of steering parts like tie rods and drag rod joints during regular service.
Replace any parts with excessive play.
Lubricate all moving parts with high-quality grease.
Quality Oil Selection
Always use high-quality oil for the steering system. Poor-quality oils can block passages and cause damage to parts like the vertical shaft.
Power Steering Pump and Hoses
Check the power steering pump for proper operation, and listen for leaks or strange noises.
Inspect hoses for kinks, cracks, or damage.
Wheel Alignment and Lubrication
Make sure the front wheels are properly aligned to avoid uneven tire wear and steering issues.
If the steering feels off, get the alignment checked.
Lubricate the steering shaft, knuckles, and ball joints every 5,000-10,000 km, as per the maintenance schedule.
By following these maintenance steps, you can keep your Sinotruk HOWO truck’s steering system working well, ensuring safe and smooth driving on the road.
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Brake System Maintenance of sinotruk howo
Keeping your Sinotruk Howo truck’s brakes in top condition is crucial for safety and performance. Regular maintenance helps prevent expensive repairs and ensures smooth operation.
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Brake Fluid Levels
Check every 10,000 km or once a month.
Fluid level should stay between the “High” and “Low” marks on the reservoir.
Sinotruk recommends DOT 4 brake fluid.
Replace every two years or 100,000 km, whichever comes first.
Brake Pad and Disc Inspection
Inspect every 15,000 km.
Replace pads if thinner than 5 mm.
Look for uneven wear, grooves, or glazing on discs, as these can reduce braking power and increase risk of failure.
Brake Clearance Adjustment
Adjust every 30,000 km.
Gap between brake pads and discs should be 0.6-0.8 mm.
Ensures proper contact and maximum braking force.
Lubrication of Brake Components
Lubricate every 50,000 km.
Use high-temperature brake grease to reduce friction and wear.
Air Pressure Testing
Check often, air pressure should stay between 650-850 kPa.
If pressure drops below 550 kPa, low-pressure warning light turns on.
Air Tank Drainage
Drain air tanks daily to remove moisture and prevent rust.
Use alcohol evaporator system in colder areas to prevent air lines from freezing.
Brake Hoses and Lines Inspection
Inspect every 20,000 km.
Replace damaged parts immediately to avoid brake failure.
Brake Chamber Push Rod Travel
Check each service.
Maximum stroke for Sinotruk Howo models is 45-50 mm.
Ensures proper brake function and stopping power.
Complete Brake System Inspection
Inspect every 100,000 km or once a year.
Test brake balance and efficiency to confirm optimal performance.
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Cooling System Care of sinotruk howo
To maintain your Sinotruk Howo truck’s cooling system, follow these steps:
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Check Coolant Levels
Inspect the coolant levels regularly and top up if needed.
Ensure the coolant-to-water ratio is correct to prevent overheating.
Inspect for Leaks or Damage
Check the entire cooling system for leaks, corrosion, or damage.
Focus on hoses, pipes, and connectors to prevent costly failures.
Clean Radiator and Cooling Fins
Keep the radiator and cooling fins free of debris, dirt, or bugs.
Blockages can reduce airflow and cause overheating.
Replace Coolant
Change the coolant as per the manufacturer’s schedule, usually yearly.
Fresh coolant prevents rusting and clogging.
Ensure Functionality of Key Components
Regularly check the thermostat, water pump, and cooling fan.
These components are crucial for engine temperature regulation.
Tighten Cooling Pipe Clamps
After 2000-4000 km, ensure all cooling pipe clamps are tight.
This helps prevent leaks and maintains system integrity.
Air Filter Maintenance
Clean or replace the air filter when needed.
A clogged air filter affects engine performance and cooling efficiency.
Monitor Engine Temperature
Keep an eye on engine temperature, especially under heavy loads.
High temperatures may signal cooling system issues.
Use Recommended Coolant Type
Use the coolant type recommended for Sinotruk Howo trucks.
Proper coolant prevents freezing, rust, and system damage.
Perform Coolant System Flush
Flush the coolant system periodically to remove contaminants.
This improves heat transfer and extends system lifespan.
Lubrication Points
Keeping your Sinotruk Howo truck in top shape isn’t just about maintenance—it’s about caring for it properly. Proper lubrication is crucial for your truck. It keeps every part moving smoothly and helps it stay in great condition for years. Let’s look at the key lubrication points, the best fluids to use, and how often your truck needs this essential maintenance.
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Engine Lubrication
Use CH-4 grade engine oil.
Capacity: 22-23L.
Change interval: 10,000km for road vehicles and 5,000km for off-road vehicles.
Transmission Lubrication
Use GL-5 85W/90 gear oil.
Oil capacity:
HW15710 and HW19710 models: 12-12.5L
HW19712 and HW20716 models: 14-14.5L
Change interval: Every 100,000km for road vehicles or 80,000km for off-road vehicles.
Axle Lubrication
HC Axle:
Middle axle: 25L
Rear axle: 22L
AC Axle:
Middle axle: 21L
Rear axle: 17.5L
Oil type: GL-5 85W/90 gear oil.
Change interval: 100,000km for road vehicles or 80,000km for off-road vehicles.
Steering System Lubrication
Use ATFIII fluid.
Oil capacity:
Single steering axle: 5.5L
Double steering axle: 6.5L
Change interval: Every 100,000km for road vehicles or 80,000km for off-road vehicles.
Other Lubrication Points
Water pump: Lubricate every 400 hours with 120g of grease.
Steering master pin: Lubricate every 400 hours as needed.
Cab damper, hydraulic lock, and flip shaft: Lubricate monthly as needed.
Front axle brake arm and camshaft: Lubricate every 400 hours as needed.
Drive axle brake camshaft: Lubricate every 400 hours as needed.
Cab door hinge: Lubricate every six months as needed.
Additional Lubrication Areas
Wheel hub bearings: Use lithium-based grease, about 0.6kg per wheel.
Brake camshaft and kingpin: Use 0.2kg of grease per point.
Tie rod ball pins and brake lash adjuster arm: Apply grease as needed.
Important Notes
After cleaning the vehicle, refill all lubrication points with grease.
For new vehicles, change the transmission oil between 2,000-5,000km.
Check oil levels and look for leaks every 10,000km, and top up as needed.
The maximum working temperature for the transmission should not exceed 120°C.
Mandatory Maintenance
You should perform mandatory maintenance on Sinotruk Howo trucks when the vehicle’s mileage reaches between 2,000 and 4,000 kilometers, or within six months of purchase. This maintenance is important for:
Removing particles, burrs, and harmful impurities from the initial operation.
Fixing issues like connection loosening caused by early use of the vehicle.
Improving vehicle reliability and extending its service life.
Key Tasks in Mandatory Maintenance
Mandatory maintenance involves important checks and adjustments, such as:
Checking and adjusting valve clearance
Replacing diesel oil and fuel filter elements
Inspecting and tightening cooling pipe clamps
Examining air filter components
Verifying clutch stroke and wire rope conditions
Maintenance for Long-Distance Trucks
For long-distance trucks, the first mandatory maintenance cycle should occur at 100,000 km or 10 months, whichever comes first. For municipal vehicles, the first cycle is required at 80,000 km or 10 months.
Maintenance Frequency Based on Usage
Maintenance frequency depends on the vehicle’s operating conditions:
Annual mileage under 20,000 km: Every 5,000 km or 150 hours
Annual mileage under 60,000 km: Every 10,000 km
Annual mileage over 60,000 km: Every 15,000 km
Regular Checks During Maintenance
During mandatory maintenance, it is essential to check the following:
Engine oil, coolant, and steering hydraulic oil levels
Tire pressure and condition
Brake system functionality
Electrical components and wiring harness (every 250 hours)
Rust Prevention
To prevent rust on your Sinotruk Howo truck, I recommend sticking to a regular maintenance routine that combines cleaning and protection.
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Regular Cleaning
Clean the truck well, focusing on the chassis and undercarriage to remove dirt, debris, and salt.
Use a pressure washer for tough-to-reach spots to ensure a thorough cleaning.
Always dry the truck before applying any rust prevention coatings.
Protective Coatings
Apply coatings like Eck Complete Corrosion Protection or POR-15 to metal surfaces, especially under the truck, in wheel wells, and on the frame.
Reapply the coatings once a year, or follow the manufacturer’s advice.
Anti-Rust Inspections
Inspect your truck for rust once a year to make sure the protective coatings are still working.
Add extra anti-rust treatments as needed during the inspection.
Use of Oil Sprays
Every 6-12 months, use a garden sprayer to apply drain oil or diluted waste oil to the undercarriage. It’s an affordable rust prevention method.
Avoid Harmful Cleaning Agents
Don’t use alkaline cleaning agents when washing the truck. These can weaken the protective coatings and reduce their effectiveness.
Storage Considerations
Keep your truck indoors or covered when possible. This will limit exposure to moisture and environmental contaminants.
Drain Plug Maintenance
Check and clear the drain plugs in the trunk, hood, and door bottoms regularly to prevent water buildup.
Timely Paint Repairs
Fix paint damage or scratches quickly to stop rust from forming on exposed metal surfaces.
Additional Considerations for Trucks Near the Ocean
If your truck is used near the ocean, rinse it with fresh water after driving on the beach to remove salt.
You might want to install an undercarriage sprinkler system to clean the underside of the truck thoroughly.
Handling Road Salt Exposure
If you drive on salted roads, avoid them when possible.
Wash the truck often during winter to remove salt and moisture that could cause rust.
