Main Driver Seat – Genuine HOWO MAX 4X2 Fully Featured Ergonomic Driver Chair
The main driver seat is the most critical component for operator comfort and safety. A high quality main driver seat reduces fatigue, supports the spine, and keeps the driver alert during long hauls. This genuine HOWO main driver seat includes dozens of precision components such as the backrest assembly, cushion, air suspension, lumbar air bags, and electronic controls. When you choose authentic Howo Parts, you receive a complete main driver seat that matches the factory original in every detail.
The backrest assembly is the upper part of the main driver seat that supports the driver’s back and shoulders. It contains the foam cushion, the backrest frame, the lumbar support mechanism, and the reclining hardware.
The seat cushion assembly is the lower part of the main driver seat that supports the thighs and buttocks. It includes high density foam, a suspension mat, and the cushion tilt adjustment mechanism.
The base assembly is the structural foundation of the main driver seat that connects to the cab floor. It incorporates the slide rails, the air suspension unit, and the mounting brackets for all other components.
The right guard is a plastic trim panel that covers the right side of the main driver seat. It protects the internal mechanisms from dust and debris and provides a finished appearance.
The front guard board is a trim panel that covers the front of the seat cushion. It hides the suspension and slide mechanisms while also serving as a mounting point for the cushion tilt lever.
The left guard board is the mirror image trim panel on the left side of the main driver seat. It matches the right guard and completes the exterior styling of the chair.
The back guard board is a rear trim panel that covers the back of the seat backrest. It protects the lumbar air lines and recline hardware and provides a clean look from the rear.
The self-skin-forming handrail is the armrest of the main driver seat. It is molded from self skinning polyurethane foam that provides a comfortable, durable, non slip surface for the driver’s elbow.
The leather skirt is a flexible leather or synthetic leather cover that spans between the seat cushion and the base assembly. It conceals the moving parts of the suspension while allowing full travel.
The quick relief valve (black) is a pneumatic component that rapidly exhausts air from the suspension when the driver exits the seat, lowering the chair for easier entry and exit.
The shoulder housing is a plastic enclosure that covers the upper seat belt retractor mechanism. It integrates with the backrest structure and provides a mounting point for the belt guide.
The safety belt assembly is the three point restraint system integrated into the main driver seat. It includes the retractor, the webbing, the latch plate, and the anchor hardware.
The backrest adjustment handle is a manual lever that releases the recline lock. Pulling this handle allows the driver to adjust the backrest angle to a comfortable position.
The ventilation switch assembly is an electronic control that activates the seat ventilation fans. It allows the driver to select from multiple fan speeds to keep the cushion and backrest cool.
The waist adjustable air bag is a pneumatic bladder located in the lower backrest. Inflating this air bag provides adjustable lumbar support that can be tailored to individual driver preference.
The side waist air regulating pack assembly includes additional air bladders on the sides of the backrest. These can be inflated to provide lateral support, keeping the driver centered during cornering.
The slide assembly is the rail system that allows the main driver seat to move forward and backward. It includes the upper and lower rails, ball bearings, and a locking mechanism with a release handle.
The air bag assembly is the main pneumatic suspension element of the main driver seat. It is a durable rubber bellows that replaces a steel spring, providing a smooth, adjustable ride.
The two position three way valve controls the air flow to the suspension air bag. It allows the driver to raise or lower the seat height with a simple lever movement.
The air valve control cam is a mechanical component that translates the height adjustment lever movement into precise valve actuation, ensuring smooth and predictable seat height changes.
The damping cable connects the variable damping adjustment knob to the shock absorber. Turning the knob changes the damping force, allowing the driver to tune the seat feel from soft to firm.
The variable damping adjustment kit includes the adjustment knob, cable, and the damping mechanism inside the shock absorber. It provides a wide range of damping settings to suit different road conditions.
The tilt angle adjustment assembly allows the driver to change the angle of the seat cushion independently of the backrest. This feature helps reduce pressure on the thighs.
The height adjustment assembly includes the air bag, the control valve, and the linkage that raises or lowers the main driver seat. It provides several centimeters of stroke.
The tilt cable assembly connects the cushion tilt lever to the release mechanism in the seat base. Pulling the cable unlocks the cushion tilt, allowing the driver to adjust the front edge height.
The safety belt buckle is the latching mechanism for the seat belt. It is mounted to the side of the seat cushion and includes an electrical switch that tells the ECU whether the belt is fastened.
The ECU assembly is the electronic control unit of the main driver seat. It manages the ventilation fans, seat heating (if equipped), and stores memory positions for drivers.
The air conditioner assembly is a Peltier based seat climate system that can blow warm or cool air through perforations in the cushion and backrest upholstery.
The variable damping bar is a mechanical link that adjusts the shock absorber’s orifice size. Turning the adjustment knob moves this bar, changing the damping rate of the main driver seat.
The control air valve components include the valves, fittings, and hoses that direct compressed air to the suspension air bag, lumbar bladders, and side support bladders.
The seat depth switch component is a control that adjusts the seat cushion length, extending or retracting the front edge to provide better thigh support for taller drivers.
The seat altitude valve is the main height control valve of the main driver seat. It is calibrated to maintain a constant ride height regardless of driver weight.
The three-way air valve (lumbar control valve, black) is a dedicated valve that inflates and deflates the lumbar support air bag. The driver operates it via a rocker switch on the side of the seat.
Main driver seat – complete HOWO premium driver chair assembly
Product Parameters of Main driver seat – Genuine HOWO MAX 4X2
| Material Encoding | Name |
|---|---|
| YZ167151000018+001/ – Backrest assembly | |
| YZ167151000018+002/ – Seat cushion assembly | |
| YG1671510007+003/1 – Base assembly | |
| YG1671510007+004/1 – Right guard | |
| YG1671510007+005/1 – Front guard board | |
| YG1671510007+006/1 – Left guard board | |
| YG1671510007+007/1 – Back guard board | |
| YG1671510007+008/1 – Self-skin-forming handrail | |
| YG1671510007+009/1 – Leather skirt | |
| WG1671510041+019/1 – Quick relief valve (black) (021401000006) | |
| YG1671510007+011/1 – Shoulder housing | |
| YG1671510007+012/1 – Safety belt assembly | |
| YG1671510007+013/1 – Backrest adjustment handle | |
| YG1671510007+014/1 – Ventilation switch assembly | |
| YG1671510007+027/1 – Waist adjustable air bag | |
| YG1671510007+028/1 – Side waist air regulating pack assembly | |
| YG1671510007+017/1 – Slide assembly | |
| YG1671510007+018/1 – Air bag assembly | |
| YG1671510007+019/1 – Two position three way valve | |
| YG1671510007+020/1 – Air valve control cam | |
| YG1671510007+021/1 – Damping cable | |
| YG1671510007+022/1 – Variable damping adjustment kit | |
| YG1671510007+023/1 – Tilt angle adjustment assembly | |
| YG1671510007+024/1 – Height adjustment assembly | |
| YG1671510007+025/1 – Tilt cable assembly | |
| YG1671510007+026/1 – Safety belt buckle | |
| YG1671510007+029/1 – ECU assembly | |
| YG1671510007+030/1 – Air conditioner assembly | |
| YG1671510007+031/1 – Variable damping bar | |
| YG1671510007+032/1 – Control air valve components | |
| YG1671510007+034/1 – Seat depth switch component (030103051535) | |
| YG1671510007+035/1 – Seat altitude valve 022000000021 | |
| YG1671510007+033/1 – Three-way air valve (lumbar control valve, black) 021402000008 | |
Why Choose Our Main driver seat for HOWO MAX 4X2?
Fully Integrated Pneumatic Suspension
The main driver seat features an air bag suspension with a quick relief valve, altitude valve, and variable damping. This system isolates the driver from road vibrations far better than mechanical springs, reducing fatigue on long hauls.
Multi Point Adjustable Lumbar & Side Supports
The waist adjustable air bag and side waist air regulating pack allow the driver to customize lumbar prominence and lateral bolster firmness. This personalized support maintains proper spinal alignment and reduces back pain.
Electronic Climate Control & Memory
The ECU assembly manages seat ventilation, heating, and optional memory positions. The air conditioner assembly provides both cooling and heating through perforated upholstery, keeping the driver comfortable in all weather conditions.
Complete Ergonomic Adjustability
This main driver seat offers cushion tilt, backrest recline, seat depth, height adjustment via air valve, and slide travel. Every driver can find the perfect driving position, reducing strain and improving safety.
Understanding the Main Driver Seat Pneumatic System
The main driver seat uses compressed air from the truck’s air system to provide suspension and adjustments. The air bag assembly supports the driver’s weight. The seat altitude valve maintains a constant ride height regardless of driver weight. The quick relief valve dumps air when the driver leaves, lowering the seat for easy exit. The variable damping kit changes the shock absorber’s response, allowing the driver to select a soft ride for smooth roads or firm damping for rough terrain.
Lumbar and Lateral Support Customization
The waist adjustable air bag is a single bladder in the lower backrest that can be inflated via the three way air valve. The side waist air regulating pack assembly consists of two bladders on the sides of the backrest. By adjusting these independently, the driver can achieve perfect torso support, reducing the muscle fatigue that comes from holding an unsupported position for hours.
Electrical Features of the Main Driver Seat
The ECU assembly powers the ventilation switch and the air conditioner assembly. The ventilation system uses fans to pull air away from the driver’s back, reducing sweat and heat buildup. The air conditioner assembly uses thermoelectric modules to provide active cooling or heating through the cushion and backrest. The seat depth switch component allows the driver to extend the front edge of the cushion, providing better thigh support for taller individuals.
Installation and Compatibility
This main driver seat is a direct replacement for the original seat in the HOWO MAX 4X2. The base assembly bolts to the existing floor mounting points using the original bolts. The electrical harness connects to the cab’s power and CAN bus using the supplied pigtail. The air lines connect to the truck’s compressed air supply with standard push to connect fittings. After installation, calibrate the ECU according to the procedure in the service manual. The seat is compatible with all HOWO MAX 4X2 cab variants from 2018 onward.
Maintaining the Main Driver Seat
Inspect the safety belt assembly annually for wear. Clean the upholstery with a mild soap solution. Lubricate the slide rails with dry silicone spray every 50,000 km. Check the air lines for leaks by listening for hissing. Replace any cracked or chafed air lines. The air bag assembly should be replaced every 500,000 km or if it shows signs of cracking. The ECU is sealed and non serviceable; replace if faulty. Always use genuine HOWO parts for any repairs to maintain the performance and safety of the main driver seat.
Troubleshooting Common Issues
If the main driver seat does not raise or lower, check the air supply line. If the seat is too firm or too soft, adjust the variable damping knob. If the lumbar support does not inflate, check the three way air valve and the air lines. If the ventilation fan does not run, check the fuse and the ECU connectors. If the seat depth adjustment does not work, inspect the cable and the release mechanism. For any electronic faults, a diagnostic tool can read the ECU fault codes. In most cases, issues can be traced to a loose connector or a damaged air line.
Why Choose Genuine HOWO Main Driver Seat Components
Aftermarket seats may lack the integrated air suspension, the multi zone lumbar support, or the climate control features. Their foam density is often lower, leading to premature sagging. The safety belt assembly may not be certified to ECE R16. The ECU may not communicate with the truck’s CAN bus. Genuine HOWO main driver seat components are designed as a complete system, ensuring that every part works in harmony. The fitment is perfect, and the safety certifications are valid. The small additional cost of genuine parts is offset by increased driver satisfaction and reduced absenteeism due to back pain.
Environmental Compliance and Packaging
The main driver seat is manufactured in an ISO 14001 certified facility. The foam is CFC free, and the steel frames are made from recycled content. The upholstery is Oeko Tex certified. The packaging consists of a reinforced cardboard box with foam inserts. All packaging materials are recyclable.
Ordering Information and Part Numbers
The complete main driver seat can be ordered using the material encoding YZ167151000018 (assembly). Individual components are listed with their own material encodings in the parameters table. Authorized HOWO dealers in Nigeria stock these genuine parts. For fleet orders of five or more seats, volume discounts are available. Always provide your vehicle’s VIN to confirm compatibility. The main driver seat is backed by a 12 month warranty against manufacturing defects.
Customer Feedback from Nigerian Fleet Operators
Fleet owners who have installed this genuine HOWO main driver seat report a dramatic improvement in driver comfort and a reduction in back pain complaints. The air suspension absorbs the worst of the laterite road vibrations. The lumbar support is especially appreciated on long distance routes. The ventilation system keeps drivers cool during the hot season. Many operators have made this main driver seat the standard for all new HOWO MAX 4X2 tractors in their fleets.
Shipping and Storage Recommendations
The main driver seat is shipped fully assembled in a heavy duty cardboard box measuring 90cm x 70cm x 60cm, weight 28 kg. Store the seat in a dry indoor area. Do not stack other items on top of the box. If storing for more than three months, cover the seat with a breathable dust cover. Avoid exposure to direct sunlight or ozone generating equipment.
