How-tos

Access step-by-step repair and maintenance guides to keep your off-road equipment running smoothly with our expert tips!

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Husqvarna Drive Belt Diagram: A Complete Guide
Jun 15, 2026

Husqvarna Drive Belt Diagram: A Complete Guide

Losing power? Our guide has the clear Husqvarna drive belt diagram for your zero-turn or riding mower. We show you the correct belt routing and provide easy, step-by-step instructions for a successful replacement.

How Often to Change Engine Coolant?
Jun 15, 2026

How Often to Change Engine Coolant?

When was the last time you changed your engine coolant? Many operators overlook it until something unexpected happens and costs them arms and legs. In this guide, we’ll learn how often to change coolant in your heavy equipment and explain why regular coolant changes can save you from costly repairs.

Doosan Common Fault Codes and First Checks
Jun 14, 2026

Doosan Common Fault Codes and First Checks

Doosan fault codes can be confusing. V-codes, flash codes, or SPN/FMI formats appear on different systems. But most codes share a few common causes. Communication faults (V201, V202) often point to wiring or ground issues. Starting and charging faults (Code 53/54) usually mean low battery voltage or alternator problems. Temperature codes (Code 14/15) may be a bad sensor or real overheating. Hydraulic faults affect digging force and boom response. Before replacing parts, do these first checks: measure battery voltage at rest and during cranking, confirm charging output (13.8V–14.4V), inspect grounds and connectors, then test the affected circuit. Fix the electrical root cause first. If replacement parts are needed, FridayParts offers high-quality aftermarket options at affordable prices.

Summer Excavator Maintenance 101: Is Your Excavator Ready for the Heat?
Jun 14, 2026

Summer Excavator Maintenance 101: Is Your Excavator Ready for the Heat?

As the scorching summer arrives, is your excavator ready for the first heat wave? Heat can significantly impact the performance and lifespan of your excavator, leading to operational inefficiency and costly repairs. So, how can you ensure proper summer excavator maintenance to keep it running smoothly? FridayParts has some tips for you!

Bobcat Code M0309: Causes, Checks, and Fixes
Jun 13, 2026

Bobcat Code M0309: Causes, Checks, and Fixes

Bobcat code M0309 shows up when voltage drops too far during startup. The machine may crank slowly, need a jump, or fail to start. This is not a hydraulic fault. The real causes are almost always electrical: a weak battery, corroded cables, a bad ground, low alternator output, or excessive starter draw. Start with simple checks. Inspect terminals and grounds. Measure battery voltage at rest and during cranking—below 9.6V points to trouble. Confirm charging voltage (13.8V–14.4V). Load-test the battery if the code returns. Check starter draw if everything else passes. Fix the root cause first. For confirmed repairs, FridayParts offers quality aftermarket parts at affordable prices.

Why Is My Excavator AC Fan Not Spinning?
Jun 13, 2026

Why Is My Excavator AC Fan Not Spinning?

A hot cabin is every excavator operator’s nightmare during scorching summers. When the excavator AC fan stops spinning, the cab heats up fast and productivity drops. In this guide, you’ll learn the causes of the AC fan not spinning and how to troubleshoot it yourself. Let’s get started!

What Does a Slipping Transmission Feel Like?
Jun 13, 2026

What Does a Slipping Transmission Feel Like?

Experiencing transmission slipping? This problem can feel like the engine is racing but your machine isn’t moving. Our guide covers the common signs, from rough shifting to burning smells, and explains the causes, like low fluid or worn clutches.

What Is Diesel Engine Sludge? Causes and How to Clean It
Jun 12, 2026

What Is Diesel Engine Sludge? Causes and How to Clean It

Engine sludge is a thick gunk from broken-down oil that can destroy your motor. It leads to overheating, clogged oil lines, and rapid component wear. We cover the top causes of engine sludge and how to clean and prevent it.

Bad Radiator Fan: Signs, Causes and Testing Guide 2026
Jun 12, 2026

Bad Radiator Fan: Signs, Causes and Testing Guide 2026

Is your engine’s radiator fan not turning on when it’s supposed to cool your engine? Don’t hurry to shop for a replacement radiator fan yet. In this guide, you’ll learn the signs, causes and how to test a radiator fan.

Why Is My Truck AC Not Cooling? Causes and Fixes
Jun 11, 2026

Why Is My Truck AC Not Cooling? Causes and Fixes

If your truck AC isn’t cooling, start by checking vent airflow versus air temperature. Strong airflow but warm air usually points to a cooling-system fault—often a dirty condenser, low refrigerant, or weak compressor output. If cooling drops at idle but works on the highway, suspect restricted condenser airflow or poor fan performance. Low refrigerant from slow leaks is also very common, while compressor failure is frequently misdiagnosed. Before replacing major parts, inspect the condenser face for debris, compare idle vs highway cooling, and check for oil residue at fittings. Matching the repair to the symptom pattern saves time and money.

What Does Cummins SPN 5246 FMI 16 Mean, Cause, and Fix?
Jun 11, 2026

What Does Cummins SPN 5246 FMI 16 Mean, Cause, and Fix?

Seeing SPN 5246 FMI 16 means your machine is in derate mode due to an unfixed emissions fault. This guide explains the real causes, from bad DEF fluid to wiring issues, and how to diagnose and fix the problem to restore full power.

Why Is Your Excavator AC blowing weak? Causes and Fixes
Jun 10, 2026

Why Is Your Excavator AC blowing weak? Causes and Fixes

If your excavator’s AC is blowing weak, the issue is almost always airflow-related rather than a cooling failure. Common causes include a clogged cabin air filter (the top culprit on dusty job sites), a dirty or iced-up evaporator core, a worn blower motor, a damaged blower wheel, or blocked air ducts. Unlike poor cooling—where air feels normal but isn’t cold—weak airflow means very little air comes out even at high fan speeds. Start by checking the filter and evaporator. If airflow drops after running the AC for 20-40 minutes, suspect ice buildup. Most weak airflow problems can be resolved by replacing the filter, cleaning the evaporator, or repairing the blower assembly—without complex refrigerant work.