How-tos

A brake fluid change is a routine service on machines with a conventional DOT brake circuit — but not every machine has one. Many tractors, loaders, and other work machines use wet brakes or oil-immersed brake packs that share fluid with the transmission or hydraulic system, where standard DOT brake fluid replacement does not apply at all. This guide explains how to identify the brake system first, recognize when a brake fluid change is actually needed, choose the correct DOT fluid grade, and avoid the wrong-fluid mistakes that can damage seals, contaminate shared oil circuits, and reduce braking performance in the field.

Tackle electrical issues with our detailed Freightliner M2 fuse box diagram. Learn to locate the Power Distribution Module (PDM), understand the multiplexed system, and identify every fuse. Get step-by-step troubleshooting tips to get back on the road.

Facing the SPN 3216 FMI 20 fault code? This error points to a faulty #1 aftertreatment inlet NOx sensor sending incorrect data, causing engine derate and poor fuel economy. Our guide covers causes, symptoms, and step-by-step fixes.

Belts are essential transmission components for various off-road machinery. Choosing the wrong one can shorten belt life, reduce equipment reliability and increase maintenance costs. In this guide, we’ll clearly show the differences and how you can evaluate and select properly.

Experiencing rough idle, black smoke, or low power? This guide details how to test fuel injectors on your diesel machinery. Learn four easy methods, from a simple listening test to a multimeter check, to diagnose faulty injectors.

A Thermo King alarm can catch you off guard, especially when the unit has been running smoothly and a flashing code appears on your screen. Next time, don’t panic. In this guide, we’ll show you how you can respond and what to do to reset Thermo King codes.

Are you struggling with your AC compressor not turning on? As the summer heat hits the jobsite, a failed AC compressor can be daunting for every heavy equipment operator. It affects the comfort, productivity and even the operator’s safety in the extreme heat. In this guide, we’ll walk you through the common causes and troubleshooting steps to get your cooling system back online fast.

Looking for the right Kubota D722 oil filter? This guide explains how to identify the correct filter, what to check in a cross reference, and how to replace it properly. It also covers oil capacity, oil type, service intervals, and common fitment problems. If your D722 engine is used in compact equipment, these practical checks can help you avoid leaks, mismatched parts, and unnecessary downtime during routine maintenance.

If your machine’s transmission is shifting hard, it’s a clear warning sign. This guide breaks down the main causes, from dirty fluid and clogged filters to faulty sensors, and provides simple fixes you can do to restore smooth shifting.

Is your heavy equipment’s AC blowing warm? Before you blame low refrigerant, learn the key bad expansion valve symptoms. A stuck valve can cause frost, erratic compressor behavior, and poor cooling. Here’s how to diagnose the problem.

Dirty fuel injectors cause hard starting, power loss, and higher fuel consumption in off-road machinery. This guide explains how to clean fuel injectors using the right method based on deposit severity—from fuel-system cleaners for mild cases to pressurized cleaning for moderate buildup and bench testing for severe fouling. It also covers warning signs, root causes like poor fuel quality and dusty job sites, and when replacement beats cleaning. Prevention through clean fuel handling and regular filter service is key to avoiding repeat downtime. For worn parts, quality aftermarket components help restore performance.

Struggling with identifying the year of your Miller welder? In this guide, we’ll present Miller Serial Number Lookup with a complete serial number chart to help you identify the age, model specifications and source correct replacement parts. Now, let’s get started!