Frequently Asked Questions About Kenworth W900B/W900L Windshield, Wiper & Roof Accessories

Will these windshield and wiper parts fit both W900B and W900L models, and what years are compatible?

Most windshield glass, wiper motors, and arms are interchangeable between W900B and W900L models from 1987 to present. However, some roof accessories like visors and trim pieces may vary between the short hood (W900B) and long hood (W900L) configurations. Always verify fitment by checking your VIN and model year, as minor changes occurred in 2007+ models for wiper motor mounting and electrical connections.

What's the difference between OEM and aftermarket windshields, and which should I choose?

OEM windshields typically use PPG or Pilkington glass with proper DOT certifications and exact curvature matching factory specs. Aftermarket options can save 30-50% but may have slight variations in tint, thickness, or edge quality. For daily drivers, quality aftermarket glass works well. For show trucks or if you need perfect factory fitment, invest in OEM. All windshields we carry meet DOT safety standards regardless of manufacturer.

How difficult is it to install windshield wipers and motors, and what tools do I need?

Wiper arm replacement is straightforward - typically requiring just a puller tool and basic hand tools. Wiper motor replacement requires removing the cowl panel, disconnecting electrical connections, and unbolting the motor assembly (2-3 hour job). You'll need metric sockets, screwdrivers, and electrical disconnect tools. Common issues include seized wiper arm nuts and corroded electrical connections, so have penetrating oil and dielectric grease handy.

What roof accessories are available and how do they attach to curved vs. flat roof models?

Popular roof accessories include sun visors (12" to 20" drops), cab lights, air horns, and antenna mounts. Curved roof models require accessories with pre-formed mounting brackets that follow the roof contour, while flat roof versions use straight brackets. Most visors attach using existing marker light holes or require drilling 4-6 mounting points. Stainless steel accessories typically include templates and mounting hardware, while chrome plastic options may need separate mounting kits.

Why do my wipers streak or chatter, and what replacement parts fix these issues?

Streaking usually indicates worn blades, but can also result from bent wiper arms or weak motor springs. Chattering often comes from incorrect arm pressure or glazed windshield surfaces. Replace blades every 6-12 months with heavy-duty 22" or 24" commercial-grade options. If problems persist, check wiper arm spring tension (should be 15-20 lbs at blade tip) and consider replacing arms. Persistent motor issues like slow speed or intermittent operation typically require complete motor replacement rather than rebuild.