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    Wiper Blade Sizes

    2021 Kenworth T680 Wiper Blade Sizes

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    Quick reference

    PositionLength (in)Length (mm)AttachmentOEM PN
    Driver28700Hook
    Passenger28700Hook

    Best aftermarket replacements

    • Bosch ICON: Premium beam blade, excellent all-weather performance. (High price tier)
    • Rain-X Latitude: Beam blade, good performance, water repellent coating. (Mid-high price tier)
    • Trico Force: Beam blade, durable construction, good in harsh conditions. (Mid price tier)
    • Michelin Stealth: Hybrid blade, good all-around performance. (Mid price tier)
    • PIAA Si-Tech: Silicone blade, long-lasting, quiet operation. (High price tier)

    Attachment style

    The 2021 Kenworth T680 primarily uses a Hook style attachment for its wiper blades. This is one of the most common and straightforward attachment methods, ensuring a secure fit.

    How to install

    Replacing the wiper blades on your 2021 Kenworth T680 is a simple maintenance task. Here are the general steps:

    1. Lift the wiper arm: Gently pull the wiper arm away from the windshield until it locks in the upright position.
    2. Remove the old blade: Locate the small tab or clip on the wiper blade where it connects to the arm. Press this tab and slide the old blade off the j-hook or attachment point.
    3. Attach the new blade: Slide the new wiper blade onto the wiper arm's hook until you hear a click or feel it lock into place. Give it a gentle tug to ensure it's secure.
    4. Lower the wiper arm: Carefully lower the wiper arm back onto the windshield.
    5. Repeat for the other side: Follow the same steps for the passenger side wiper blade.

    Note: While hook attachments are common, always double-check your specific wiper arm and blade for any unique attachment mechanisms. Refer to the instructions provided with your new wiper blades if you encounter an unusual attachment style.

    When to replace

    Wiper blades are a critical safety component on your truck, and regular replacement is essential for clear visibility. You should consider replacing your wiper blades every 6 to 12 months, or at the first signs of wear. Here are common indicators that your wiper blades need replacing:

    • Streaking: If your wipers leave lines or streaks of water on the windshield, the rubber element is likely worn or damaged.
    • Chattering or skipping: When the blades don't glide smoothly across the glass and instead skip or chatter, it's a sign of stiff or hardened rubber.
    • Squeaking: Excessive noise during operation can indicate worn blades or an improper angle.
    • Visible damage: Inspect the rubber element for cracks, tears, or missing pieces. Anytime the rubber appears compromised, it's time for a new blade.

    Proactive replacement ensures you maintain optimal visibility during rain, snow, and other adverse weather conditions.

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    More specs for the 2021 Kenworth T680

    Oil Capacity & Filter

    Capacity, weight, filter PN, drain plug torque, change interval.

    Fluid Type Specs

    Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.

    Coolant Capacity & Type

    Total system capacity, OEM coolant spec, flush interval, bleed tips.

    Transmission Fluid & Service

    Trans model, fluid spec, capacity, filter PN, service interval.

    Torque Specifications

    Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.

    Brake Pad & Rotor Specs

    Pad PNs, rotor size, min thickness, caliper torque.

    Tire Size & Pressure

    OEM size, cold psi, bolt pattern, wheel size, TPMS.

    Battery Size & Group

    Group size, CCA, AGM/flooded, dimensions, reset note.

    A/C Refrigerant & Oil

    R-134a or R-1234yf, charge oz, PAG oil spec.

    Bulb Sizes (Headlight, Tail, Fog)

    Headlight, fog, tail, turn, reverse, interior.

    Factory Maintenance Schedule

    Service intervals by mileage, severe-duty notes, known issues.

    Towing Capacity & Payload

    Max tow, payload, GVWR/GCWR, hitch class by trim.

    Fuse Box Diagram & Amperage

    Fuse box locations, layout, amps, and what each fuse controls.

    Serpentine Belt Routing & Length

    Belt routing, length, rib count, OEM + aftermarket PNs.

    Wheel Alignment Specifications

    Camber, caster, toe ranges (front & rear), adjustability notes.

    Paint Color Codes

    All factory colors with paint codes, sticker location, touch-up tips.

    Spark Plug Type & Gap

    Plug PN, gap, torque, interval by engine.

    Transmission & Axle Gear Ratios

    Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.

    Key Fob Programming

    DIY programming steps, FCC ID, fob PN, battery, transponder.

    Same spec — other model years

    Maintenance & repair guides

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