The part is an essential safety system for the HOWO MAX 4X2 tractor, providing clear visibility in rain, snow, and spray. This genuine HOWO Wiper Assembly kit includes the motor bracket, connecting rod, arms, blades, and all mounting hardware – engineered for reliable, streak‑free wiping performance.
When you choose authentic Howo Parts, this Wiper Assembly guarantees OE fitment and long‑lasting operation. Below are detailed descriptions of every component included with this Wiper Assembly.
The wiper motor bracket is a precision‑stamped steel support that securely mounts the wiper motor to the cab structure. This Wiper Assembly bracket is engineered for the NJ20 wiper system,
featuring reinforced ribs to dampen vibration and ensure the motor remains perfectly aligned. The bracket includes pre‑drilled holes that accept the M8 flange bolts, providing a rigid, rattle‑free mounting point for the entire Wiper Assembly drive mechanism. Its corrosion‑resistant coating protects against moisture and road salts, ensuring long‑term durability.
Three flange bolts (ZQ1840820F31) are used to attach the wiper motor bracket to the cab, while four flange bolts (ZQ1840825F31) secure the connecting rod assembly and other components of The part.
These bolts feature an integral flange that acts as a built‑in washer, distributing clamping load evenly and eliminating the need for separate washers. Made from grade 8.8 steel with a zinc‑plated finish,
they resist corrosion and provide a secure, vibration‑proof fastening. Correct torquing of these bolts is essential to maintain the integrity of The part and prevent looseness that could lead to wiper chatter or misalignment.
Three large washers (Q402B08F31) are supplied to distribute the clamping load under the bolt heads when securing the wiper motor bracket. These washers are made from hardened steel with a zinc coating,
preventing the bolt head from embedding into the bracket and ensuring consistent clamp force. They are an essential part of The part mounting system, protecting the bracket from deformation and maintaining the correct tension over time. When installing The part, these washers should be placed between the bolt head and the bracket to ensure a durable, long‑lasting attachment.
The wiper connecting rod assembly is the mechanical linkage that transfers motion from the wiper motor to the two wiper arms. This Wiper Assembly component consists of a steel main rod with ball‑joint connections at each end, allowing smooth articulation and precise synchronisation of the left and right wipers.
The connecting rod is designed for the NJ20 wiper system, with sealed ball joints that resist dirt and moisture ingress. It ensures that both wiper blades move in perfect unison across the windshield, providing consistent clearing action. A worn connecting rod can cause wiper skipping or uneven wiping; replacing it with this genuine Wiper Assembly part restores smooth, reliable operation.
Two wiper arm assemblies are included, one for the driver side and one for the passenger side. Each Wiper Assembly arm is made from high‑strength steel with a black powder‑coat finish, featuring an integrated spring that applies downward pressure on the wiper blade for optimal contact with the windshield.
The arm attaches to the wiper pivot shaft via a splined connection, with a locking nut that allows easy adjustment of the park position. The arms are designed for the NJ20 Wiper Assembly, providing the correct length and curvature to cover the full wiping area. A bent or corroded wiper arm can cause streaking or chatter; replacing it with a genuine Wiper Assembly arm ensures a perfect fit and consistent pressure distribution.
Two wiper blade assemblies are supplied, each comprising a rubber wiping element and a steel carrier frame. These Wiper Assembly blades are designed specifically for the HOWO MAX 4X2 windshield curvature, providing streak‑free clearing in all weather conditions. The rubber element is made from natural rubber with a graphite‑coated wiping edge,
reducing friction and noise while improving water repellency. The blade frame incorporates multiple pressure points to maintain even contact across the entire wiping arc. Regular replacement of the wiper blades is essential for maintaining visibility; these genuine Wiper Assembly blades offer superior durability and performance compared to generic alternatives.
Wiper Assembly – genuine HOWO complete front wiper system kit for MAX 4X2
This Wiper Assembly kit includes every component needed to replace the entire front wiper system – from the motor bracket to the blades. No extra parts are required, making The part a convenient, all‑in‑one replacement set for the HOWO MAX 4X2.
All Wiper Assembly parts are manufactured to the NJ20 standard, ensuring precise fitment and smooth operation. The connecting rod, arms, and blades are matched to the original wiper motor, providing the correct sweep angle and park position.
The part includes all necessary flange bolts and large washers, which are grade 8.8 and zinc‑plated for corrosion resistance. Using the correct hardware ensures a secure, vibration‑proof mounting and prevents loosening over time.
The wiper blades included in this Wiper Assembly are made from premium natural rubber with a graphite‑coated wiping edge, providing silent, streak‑free cleaning. They are designed to withstand extreme temperatures and UV exposure, ensuring a long service life.
The part is driven by an electric motor mounted on the bracket, which rotates a crank arm that moves the connecting rod. The connecting rod translates this rotary motion into a reciprocating movement, transferring it to the wiper arm shafts. The wiper arms, fitted with the blades, sweep across the windshield in a synchronized pattern.
The motor bracket ensures the motor remains fixed, while the large washers and flange bolts secure all components firmly. The part is designed to operate at multiple speeds,
with the motor controlled by a switch on the dashboard. A worn connecting rod or loose fasteners can cause wiper chatter or uneven wiping; replacing The part with genuine parts restores smooth, quiet operation. Regular inspection of The part is essential for maintaining clear visibility in adverse weather conditions.
Before installation, ensure the wiper motor is in the park position. Remove the old wiper arms and blades, then unbolt the motor bracket and connecting rod. Clean the mounting surface on the cab. Install the new wiper motor bracket using the M8 flange bolts and large washers,
torquing to 25 Nm. Attach the connecting rod to the motor crank and the wiper arm pivot shafts. Secure the rod with the provided hardware. Install the wiper arms onto the splined shafts,
positioning them at the correct park angle (usually 10‑15 degrees from horizontal). Tighten the arm retaining nuts to 15 Nm. Finally, clip the new wiper blades onto the arms. Test The part by running the wipers through a full cycle to ensure they do not hit the windshield frame or each other. The part installation is now complete.
If the wipers move slowly or stall, check the motor connections and the fuse. A clicking noise from The part often indicates a worn connecting rod joint; replace the connecting rod assembly. If the blades streak or skip,
the wiper arm pressure may be insufficient or the blade rubber may be worn; replace the blades. Loose bolts can cause rattling; retorque all fasteners. If the wipers do not park correctly, the motor park switch may be faulty; check the wiring. Always use genuine Wiper Assembly parts for reliable repairs.
Inspect The part every 20,000 km or annually. Check the blades for cracks or hardening; replace them at least once a year. Lubricate the connecting rod ball joints with a silicone spray to prevent squeaking.
Tighten any loose bolts. Clean the windshield and the wiper blades regularly to avoid debris buildup. A well‑maintained Wiper Assembly ensures clear visibility and safe driving in all weather conditions.
This Wiper Assembly kit is specifically designed for the HOWO MAX 4X2 tractor and is compatible with all production years from 2018 onward. The NJ20 designation indicates it fits the standard wiper system used on these models.
The kit is also suitable for SITRAK C7H and HOWO T7H vehicles that use the same wiper architecture. It is not compatible with older A7 or WD615 models, which have different bracket and arm designs. Always verify your vehicle’s wiper system type before ordering.
Aftermarket Wiper Assembly components often use inferior materials that corrode quickly, leading to wiper failure in heavy rain. Generic blades may not provide proper contact pressure, causing streaks and reduced visibility. Non‑genuine fasteners can loosen and cause the wiper system to malfunction.
A failed Wiper Assembly can compromise driver visibility, increasing the risk of accidents. Genuine HOWO Wiper Assembly components are manufactured to SINOTRUK’s exacting standards, using high‑grade metals and rubber compounds.
The small additional cost of a genuine Wiper Assembly is insignificant compared to the safety it provides. For fleet operators, using genuine Wiper Assembly kits ensures consistent wiping performance across all vehicles, reducing driver complaints and improving safety.
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