How-tos

When a P0037 code lights up your dashboard on a heavy-duty on-road truck, it signals that your aftertreatment system isn’t working as it should. But this issue is fixable when you know where to look. In this article, we’ll explain what Code P0037 means, why it happens, and how to repair it effectively. We’ll also touch on rare cases where similar issues might appear in non-road equipment powered by similar Tier 4 Final engines. Suppose you own or operate heavy trucks or specialized off-road machinery with emission-controlled diesel engines. In that case, this guide is designed to help you avoid downtime, reduce fuel consumption, and prevent unnecessary part replacements.

Failures in heavy off‑road equipment rarely happen overnight. In most cases, they are the result of gradual neglect, unnoticed wear, or skipped inspections. A wheel loader is a powerful and resilient machine, but it depends on well‑maintained systems — hydraulic, electrical, cooling, and drivetrain — to deliver peak performance. When one of these systems weakens, signs begin to appear: noises, fluid leaks, power loss, or overheating. This article explains the most common 7 warning signs that your loader is failing, why they happen, and how we can prevent them.

A failing EGR cooler can sideline your equipment and lead to costly engine repairs. Learn the common warning signs—from engine overheating to specific fault codes—before it’s too late. This complete guide from FridayParts covers symptoms, diagnosis, replacement costs, and preventive maintenance to protect your engine and keep your operation running efficiently.

Many owners think a clogged hydraulic oil filter just stops working. The reality is far more damaging. When impurities block the filter, a bypass valve opens, unleashing contaminated oil directly into your heavy equipment’s core. This unfiltered fluid accelerates wear on expensive pumps and valves, causing sluggish performance, power loss, and costly failures. Learn how this destructive chain reaction happens and what you can do to prevent it, protecting your investment and maximizing uptime.

Checking and maintaining proper track tension on a Bobcat excavator is one of the most effective ways to extend the life of your undercarriage parts, prevent costly downtime, and maintain smooth operation on any job site. The right tension keeps the track in sync with sprockets and rollers, preventing wear and energy loss. In this guide, we’ll show you step by step how to check and adjust your Bobcat excavator parts for ideal track performance.

A squealing 6.7 Cummins is a warning sign. It could be a failing idler pulley. Our complete guide covers symptoms, replacement cost, and step-by-step DIY instructions to prevent costly downtime and keep your heavy equipment running reliably.

Don’t ignore a glowing Steering Wheel Light! It signals a critical safety issue. This guide helps you diagnose the cause, covering hydraulic, electronic, and mechanical systems. Learn simple checks, when to use a scan tool, and the importance of a SAS reset to fix the problem correctly.

Brake fluid sits in your equipment’s brake system, out of sight and often out of mind. Many operators and owners completely ignore it, focusing on more obvious maintenance like oil changes. But neglecting brake fluid changes creates serious safety risks and expensive repair bills. Let’s look at exactly what happens when you skip this critical maintenance.

Your engine’s power and compression rely heavily on properly sealed piston rings. When they fail, your machine starts burning oil, losing power, or emitting blue smoke — signs no operator wants to see. For that, many off‑road equipment owners wonder, “How much will it really cost to replace them?” This guide provides an honest breakdown of piston ring replacement costs, explains when to replace them, and helps you decide whether repair or replacement makes better sense in 2025.

A failing fuel pressure regulator can cripple your heavy equipment, leading to unstable fuel pressure and a host of engine troubles. Recognizing the bad fuel pressure regulator symptoms is crucial for any machinery owner. This guide details the top 8 signs, including poor performance under load, engine misfires, excessive black smoke, and even no-start conditions. We’ll explain why these issues happen and how they point to a faulty regulator. Learn to spot these warnings early to prevent costly engine damage.

Your heavy equipment’s battery light is a critical warning for the charging system, not just the battery. This guide covers the top 5 causes, like a failing alternator or broken belt, and what to do immediately to avoid a complete shutdown and costly downtime on site. Learn to act fast.

When the check‑engine light flashes and your diagnostic tool reads P0340 code, you’re not alone. This error appears frequently on light‑duty diesel trucks — such as Ford F‑series, Dodge Ram Cummins, or Toyota Hilux — but the same underlying issue also exists in off‑road machinery like excavators and loaders using similar electronic fuel management systems. The P0340 code identifies a fault in the camshaft position sensor circuit — a small component whose failure can cause sudden stalls, misfires, or even no‑start conditions. In this guide, we’ll explain what that sensor really does, why you might still see the code after replacing it, and how to perform a proper camshaft position sensor replacement to restore reliable power and timing to your heavy equipment.