DEF System Parts Buying Guide
Learn how DEF system components work and what to check before replacing tank headers, dosing pumps, or filters.
Explore Doggett's parts buying guides to learn what each category covers, what fails and why, and what to check before you order. Whether you need maintenance parts, replacement components, or equipment accessories, these guides help you order with confidence.
Learn how DEF system components work and what to check before replacing tank headers, dosing pumps, or filters.
Mirrors, sun visors, floor mats, and cab hardware that keep the operator station usable through a long shift.
Sizing, fabric weight, and fit across shirts, outerwear, gloves, and everyday carry, with care notes for workwear.
Match a ride on or wagon to age range, weight limit, and assembly time, covering pedal, battery, and push models.
Size a generator by running watts, surge capacity, and fuel type before you buy for the shop or jobsite.
Pick the tooth profile and adapter that suit your ground conditions, and learn the wear signs that mean replace now.
Choose the right bale spear for your John Deere skid steer, compact track loader, or compact wheel loader.
Find the right bucket teeth, cutting edges, moldboards, and mounts for your John Deere machine.
Looking for a specific replacement part? Browse Doggett's complete parts catalog to find components for your John Deere equipment.
Practical tips from the parts team who answer these questions every day.
Compare options, specs, and fitment before you place the order.
Know the intervals and wear signs that keep a machine working.
A single hub for every John Deere parts guide we publish.
Yes. Doggett is an authorized John Deere dealer for construction and forestry equipment, so the parts sold here are genuine John Deere OEM components built to the original specification for your machine, not copies or reboxed equivalents. Buying from an authorized dealer also means the parts team can confirm fitment before you order and any warranty position is preserved.
On most construction machines the product identification number plate sits on the frame near the operator station, and on forestry machines it is usually on the rear or side of the frame. Take a photo of it once and keep it on your phone, because the parts team needs the serial number as well as the model. John Deere changes components mid production, so two machines of the same model can take different parts depending on build date.
Start with your machine model and serial number, then match the part number if you have one. Serial number matters as much as model, because John Deere changes components mid-production and the same model can take different parts depending on build date. The buying guides walk through what to check for each category, and the parts team can confirm fitment before you order.
John Deere OEM parts are built to the original specification for your machine, with the fit, materials, and tolerances John Deere engineered for it. Aftermarket parts are made by third parties and vary widely in quality, fitment, and warranty position. On components where a failure takes the machine out of service, such as hydraulics, drivetrain, and aftertreatment, the price difference is usually smaller than the cost of a second repair.
Yes, parts ship nationwide. Eligible online orders of $49 or more, excluding shipping and tax, may qualify for free standard ground shipping within the United States under the current offer. Restrictions apply based on item weight, dimensions, and certain fluid products. See our current free-shipping terms for eligibility and offer dates, and confirm shipping costs at checkout. Lead times vary by part, so check availability if your machine is down.
Yes. Contact the parts team with your model and serial number and they will identify the correct component, including parts that are ordered in rather than stocked. You can also visit any of the 16 Doggett locations across Texas and Louisiana, or search directly by part number from any page on the site.
Our parts experts confirm fitment against your model and serial number before you order.