John Deere L100, L108, L110 Charging System Repair – How To

In JOHN DEERE L100 L108 L110 SERVICE REPAIR Manual, your lawn tractor isn’t charging the battery, it’s time to look into the charging system. A weak or dead battery usually means there’s an issue with the alternator, voltage regulator, or wiring.

Step 1: Test the Battery

Before assuming there’s a bigger issue, start by checking your battery voltage with a multimeter. A fully charged battery should read around 12.6 volts with the engine off.

Step 2: Inspect the Alternator

The alternator (or stator) under the flywheel generates current. Start the engine and measure voltage at the battery terminals—it should rise to 13.5–14.5 volts if charging correctly. If it doesn’t, inspect the alternator wires for corrosion or damage.

Step 3: Check the Voltage Regulator

The voltage regulator ensures stable power output. If it’s faulty, the battery won’t charge properly. Locate it near the engine shroud, test it with a voltmeter, and replace it if readings are inconsistent.

Step 4: Clean and Tighten Connections

Loose ground wires or corroded terminals can interrupt the charging flow. Clean battery posts and ensure all electrical connections are tight and free of rust.

Repairing the charging system in your John Deere L100 series restores full battery function and keeps your mower starting strong every time.

How To Change Out A John Deere Drive Belt

A worn or broken drive belt can cause your John Deere mower to lose power or stop moving altogether. Learning how to replace it yourself saves time and money.

Step 1: Safety First

Before starting, park the mower on a flat surface, remove the key, and disconnect the spark plug to prevent accidental starts.

Step 2: Remove the Deck

Lower the mower deck completely, then remove the belt covers and deck retaining pins. Slide the deck out from under the tractor.

Step 3: Remove the Old Belt

Locate the drive belt that runs around the pulleys. Use a wrench to release the tension from the idler pulley and slip the belt off carefully.

Step 4: Install the New Belt

Route the new belt following the belt diagram in your owner’s manual. Make sure it sits properly in all pulley grooves before reattaching the deck.

Step 5: Test Run

Reconnect the spark plug and start the engine. Engage the drive and ensure the belt runs smoothly without slipping.

Replacing the drive belt keeps your John Deere mower performing efficiently and prevents costly downtime during mowing season.

How to Remove the Blade Engagement Cable on a John Deere

The blade engagement cable (PTO cable) connects the lever or switch to the mower deck, controlling when the blades spin. Over time, this cable can stretch, rust, or snap—requiring replacement.

Step 1: Disconnect the Cable

Start by parking the mower on level ground and removing the ignition key. Locate the engagement cable near the control lever and disconnect it from the handle bracket.

Step 2: Detach from the Deck

Crawl under the deck and find where the cable hooks to the idler arm spring or blade engagement mechanism. Use pliers to carefully unhook it.

Step 3: Remove Cable Clips

Follow the cable along the frame and release any retaining clips that secure it. Keep these clips for reinstallation.

Step 4: Install the New Cable

Route the new cable the same way as the old one, reconnect both ends, and ensure proper tension adjustment.

A properly installed blade engagement cable ensures smooth blade operation and extends the life of your mower deck components.