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A reliable and efficient windshield wiper system is critical for maintaining driver visibility and safety in all weather conditions. For SINOTRUK Howo trucks, the WG1642740012/1 Feather Arm Set (LH/RH) is an essential chassis component that forms the mechanical backbone of the wiper assembly. This complete set of left-hand and right-hand wiper arms ensures optimal blade contact and pressure across the entire windshield. When sourcing dependable Sinotruk howo parts, the WG1642740012/1 set stands out for its OEM-grade engineering and perfect fitment.
The WG1642740012/1 is a complete pair of windshield wiper arms designed for SINOTRUK Howo trucks. This set includes both the left-hand (LH) and right-hand (RH) arms, which are the primary structural components connecting the wiper transmission to the wiper blades. Often called “feather arms” due to their lightweight yet sturdy design, they convert the rotary motion from the wiper motor linkage into the precise arcing sweep across the windshield. The arms are typically constructed from high-strength, corrosion-resistant steel or aluminum alloy.
They are engineered to maintain consistent downward pressure on the wiper blade along its entire travel path. This ensures even contact with the curved glass, preventing streaks and missed spots. The WG1642740012/1 set is a direct OEM replacement, matching the original arm length, mounting mechanism, and spring tension specifications perfectly.
Each arm features a robust mounting head that secures to the wiper motor’s output spline or linkage ball joint. The opposite end has a standardized adapter (hook type or bayonet) for attaching the wiper blade assembly. The spring-loaded design is critical; it allows the arm to apply uniform pressure, ensuring the blade conforms to the windshield contour even at high speeds. Over time, arms can become bent, lose tension, or corrode at the pivot. Replacing both arms simultaneously with the WG1642740012/1 set restores the wiper system’s geometric accuracy and wiping performance, which is essential for safety.
Each arm in the WG1642740012/1 set is calibrated with precise spring tension. This ensures the wiper blade maintains consistent contact pressure across the windshield, eliminating chatter, lifting, and poor wiping in the center or edges.
Manufactured from coated steel or treated aluminum, the arms resist rust and corrosion from road salt, moisture, and UV exposure. This preserves structural integrity and ensures smooth pivot movement for years of reliable service.
The arms are engineered to the exact length and bend profile required for the SINOTRUK Howo windshield. This guarantees maximum sweep area and prevents interference with the windshield frame or hood.
| Parameter | Specification |
|---|---|
| OEM Part Number | WG1642740012/1 |
| Product Name | Feather Arm Set Lh/Rh |
| Brand | SINOTRUK Howo |
| Set Contents | Left-Hand (LH) and Right-Hand (RH) Wiper Arms |
| Primary Material | High-Strength Steel with Anti-Corrosion Coating |
| Mounting Type | Spline or Ball Joint (Model Specific) |
| Blade Attachment | Standard Hook or Bayonet Adapter |
| Compatible Models | SINOTRUK Howo A7, T5G, T7H, ZZ3257 and other series. |
The WG1642740012/1 arms are the critical link between the wiper motor’s power and the blade’s cleaning action. They must be perfectly straight and properly tensioned. A bent or weakened arm cannot apply even pressure. This causes the blade to skip, chatter, or leave large unwiped areas. In heavy rain or snow, this drastically reduces visibility. The arms also ensure the blades park in the correct position below the windshield cowl. Incorrect park position can leave blades exposed to damage or obstruct the driver’s view. The synchronized movement of the LH and RH arms is essential for clearing the maximum possible area. Using a mismatched or worn set compromises the entire system. The genuine WG1642740012/1 set restores this precise mechanical function.
Faulty wiper arms that cause poor blade contact can lead to severely impaired visibility during precipitation. This significantly increases the risk of accidents, making timely replacement of the WG1642740012/1 set a key safety measure.
To install the WG1642740012/1 set, first lift the old wiper arms away from the windshield. They are under spring tension, so be careful. Most arms have a small tab or cap covering the mounting nut.
Remove the cap (if present) and use a wrench to loosen the retaining nut. Do not remove it completely yet. Gently rock the arm back and forth to loosen it from the splined wiper motor shaft.
Once loose, remove the nut and lift the old arm off. Clean the splined shaft of any rust or debris. Position the new WG1642740012/1 arm onto the shaft, aligning it with the correct park position.
Tighten the retaining nut to the manufacturer’s specified torque. Do not overtighten. Gently lower the arm onto the windshield. Attach new wiper blades to the arms. Repeat for the other side.
Test the wiper operation on all speeds. Ensure the arms do not strike the windshield frame and park correctly. Periodically check arm tension and straightness during routine vehicle washes.
The WG1642740012/1 set is vital for all SINOTRUK Howo operations. In long-haul transport across varied climates, reliable wipers are essential for dealing with sudden rain showers.
For construction and logging trucks, the arms must withstand vibration and exposure to mud and tree branches. Robust construction prevents bending and failure in rough conditions.
In cold climate operations, the arms must lift slightly to allow ice scrapers to clear the windshield. Proper spring tension in the WG1642740012/1 set allows for this without damage.
The genuine WG1642740012/1 set guarantees the exact spring rate and metal strength specified by SINOTRUK. This ensures consistent blade pressure and long-term durability.
Aftermarket arms often have weaker springs or imprecise mounting holes. This leads to poor wiping performance, premature blade wear, and potential damage to the wiper motor linkage.
The OEM set ensures perfect alignment and park position. This prevents wear on the wiper transmission and protects the windshield from scratches caused by misaligned arms.
For fleet maintenance, using the correct WG1642740012/1 parts simplifies repairs and ensures consistent performance across all vehicles. It is a cost-effective investment in safety.
If wipers chatter or skip, inspect the WG1642740012/1 arms for bending or loss of spring tension. A simple replacement often solves the issue more effectively than new blades alone.
If the wiper leaves a large unwiped area, the arm may be bent or the wrong length. Compare it with the genuine WG1642740012/1 specification for your truck model.
If the arm is loose on the splined shaft, the mounting hole may be worn. Replacing the entire arm with a new WG1642740012/1 unit provides a tight, secure fit.
The WG1642740012/1 Feather Arm Set is a fundamental component of the SINOTRUK Howo’s visibility system. Its role in ensuring effective windshield cleaning is directly tied to driver safety.
Maintaining these arms in good condition is a simple yet crucial aspect of vehicle upkeep. It guarantees that your wiper system performs optimally when you need it most.
Investing in the genuine WG1642740012/1 set ensures reliability, perfect fit, and peace of mind. It is a small but vital part that plays a major role in safe, all-weather truck operation.
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