44100A000P CYLINDER ASSY, RR BRAKE, LH FIT MITSUBISHI TRITION ,TRITO,L200,STRADA

Product Function Description

The rear brake wheel cylinder (part number 44100A000P) is a critical hydraulic component of your Mitsubishi Triton or L200‘s rear drum brake system. Its primary function is to convert hydraulic pressure from the brake master cylinder into mechanical force that pushes the brake shoes outward against the brake drum, slowing and stopping the vehicle. This wheel cylinder is designed for the left-hand (LH) rear position, with a piston diameter of 7/8” (22.2mm) matching the NISSIN brake system used on these applications . For Mitsubishi Triton and L200 models equipped with rear drum brakes, a properly functioning wheel cylinder is essential for balanced rear braking, reliable parking brake performance, and safe vehicle operation.

Common Symptoms of a Failing Wheel Cylinder

If you are experiencing any of the following symptoms, your rear brake wheel cylinder may be failing and in need of replacement:

• Brake fluid leaks inside the drum: Visible moisture or fluid trails on the backing plate or inside the brake drum – this indicates worn piston seals or a corroded bore

• Spongy or sinking brake pedal: The pedal feels soft or slowly sinks when pressure is held – this suggests internal leakage or air entering the system

• Pulling to one side under braking: The vehicle pulls to one side during braking, especially at low speeds – this indicates uneven braking force from a sticking or leaking cylinder

• Contaminated brake shoes: Brake shoes soaked with brake fluid, reducing friction and braking effectiveness – this is a direct result of cylinder seal failure

• Low brake fluid with no external leaks: The master cylinder reservoir requires frequent topping up without visible leaks elsewhere – this suggests internal cylinder leakage

• Rear brake drag or poor parking brake hold: The rear brakes drag or the parking brake does not hold properly – this can indicate a seized piston in the wheel cylinder

If you have confirmed these symptoms through inspection, replacing the wheel cylinder is the recommended solution.

Product Specifications

Why Choose This Wheel Cylinder?

Restores Balanced Braking – A leaking or seized wheel cylinder causes uneven braking and pulling. This new cylinder restores proper hydraulic force distribution for balanced rear braking.

Eliminates Fluid Contamination – Worn seals allow brake fluid to soak the brake shoes, ruining friction material. This new cylinder provides proper sealing to protect the shoes.

Direct Replacement – Precision-engineered to match the original wheel cylinder specifications. Direct replacement – no modifications required. Part number 44100A000P is confirmed for Mitsubishi Triton and L200 applications with brake systems .

Component Location & Core Function

Location: The rear brake wheel cylinder is mounted on the rear brake backing plate inside the brake drum assembly. It sits at the top of the backing plate, between the upper ends of the two brake shoes, and is positioned on the left-hand (LH) side of the vehicle’s rear axle .

Connections: The wheel cylinder connects to the hydraulic brake line via a threaded inlet port (typically M10x1.0 thread). A bleed nipple is provided for system bleeding. The cylinder’s two pistons contact the upper ends of the brake shoes. When hydraulic pressure is applied, the pistons push outward, forcing the shoes into contact with the drum. The cylinder is secured to the backing plate with bolts .

Core Function: The wheel cylinder serves as the hydraulic actuator for the rear drum brakes. It converts hydraulic pressure from the master cylinder into mechanical force that applies the brake shoes. The cylinder contains two pistons, rubber cups (seals), dust boots, and a central bore. When the brake pedal is pressed, pressurized fluid enters the cylinder, pushing both pistons outward simultaneously. This even force distribution ensures both brake shoes contact the drum evenly for balanced braking. When the pedal is released, return springs pull the shoes back, and the piston seals allow the pistons to retract slightly .

DIY or Professional Installation?

This replacement is suitable for DIY if:

• You have experience servicing drum brake systems and hydraulic brake components.

• You have access to a flare nut wrench, socket set, brake bleeder kit, and brake fluid.

• You can safely lift and support the vehicle on level ground.

We recommend professional installation if:

• You are unfamiliar with drum brake disassembly and hydraulic system bleeding.

• You lack the proper tools for brake line removal and bleeding.

• You are not confident in bleeding the brake system or adjusting brake shoes.

Note: Improper installation can lead to brake failure and safety issues. After installation, the brake system must be properly bled to remove all air. Use the correct brake fluid grade (DOT 3 or DOT 4 as specified). Replace brake shoes if contaminated with fluid. Adjust brake shoes after installation.

Step-by-Step Installation Guide

This installation guide is designed to help you replace your rear brake wheel cylinder with confidence. Before starting, ensure the vehicle is parked on level ground with the engine off. You will need the following tools: flare nut wrench, socket set, brake bleeder kit, and brake fluid.

Step 1: Lift and secure the rear of the vehicle on jack stands. Remove the wheel and brake drum.

Step 2: Remove the brake shoes and associated hardware. Note the position of springs and adjusters for reassembly. Place a container underneath to catch brake fluid.

Step 3: Disconnect the brake line from the wheel cylinder using a flare nut wrench. Remove the bolts securing the cylinder to the backing plate.

Step 4: Remove the old wheel cylinder. Clean the backing plate mounting surface.

Step 5: Install the new wheel cylinder. Secure with mounting bolts. Reconnect the brake line and tighten securely.

Step 6: Reinstall the brake shoes and hardware. Reinstall the brake drum and wheel.

Critical Step: Bleed the brake system thoroughly at the rear bleed nipple until no air bubbles appear and the pedal feels firm. Check for leaks around the cylinder and brake line connections. Adjust brake shoes and parking brake if necessary .

Pro Tip: When replacing a wheel cylinder, always replace both sides on the rear axle for balanced braking. Replace brake shoes if contaminated with fluid. Flush the brake system with fresh fluid if the old fluid is dark or contaminated.

Common Misconceptions About Wheel Cylinders

Myth 1: A wheel cylinder either works or it doesn‘t.
Fact: Wheel cylinders can leak slowly over time, contaminating brake shoes and reducing braking performance gradually. Early symptoms like a spongy pedal or fluid level drop should not be ignored.

Myth 2: Any wheel cylinder will fit.
Fact: Wheel cylinders are vehicle-specific and must match the bore diameter, brake system type, and mounting configuration. This cylinder is designed specifically for Mitsubishi Triton and L200 applications with NISSIN brake systems .

Myth 3: You can clean fluid-contaminated brake shoes.
Fact: Brake fluid cannot be cleaned out of brake shoe friction material. Contaminated shoes must be replaced, as the fluid reduces friction and braking effectiveness .

Common Customer Concerns & Our Solutions

We understand that purchasing a rear brake wheel cylinder can raise questions and concerns. Here is how we address the most common issues our customers face:

For Individual Vehicle Owners:

“How do I know if this wheel cylinder fits my vehicle?” – This wheel cylinder fits Mitsubishi Triton and L200 models with the NISSIN rear drum brake system. Please confirm your vehicle’s model and brake system before ordering. The part number 44100A000P is the most reliable identifier and is used on the left-hand (LH) rear position with a 7/8” piston diameter .

“What if I install it and the pedal still feels spongy?” – A spongy pedal after installation usually indicates air in the system. Re-bleed the brake system thoroughly. If the issue persists, check for leaks at the brake line connections and cylinder.

“Can I replace just one wheel cylinder?” – It is strongly recommended to replace wheel cylinders in pairs across the rear axle. Replacing only one side can cause uneven braking and pulling .

For Repair Shops and Professionals:

“Customer says the rear brakes drag after cylinder replacement.” – Check that the cylinder is the correct bore size and that the brake shoes are properly adjusted. A seized or incorrect cylinder can cause drag. Verify the parking brake adjustment as well.

“How to avoid comebacks after wheel cylinder replacement?” – Replace both sides, replace contaminated shoes, bleed the system thoroughly, adjust brake shoes, and check for leaks after pressurizing the system .

“Customer wants to reuse fluid-contaminated shoes.” – Explain that brake fluid cannot be cleaned from shoe friction material. Contaminated shoes will not provide proper braking and must be replaced. Reusing them risks brake failure.

After-Sales Service & Warranty

This product is covered by our quality assurance. If you have any questions or issues regarding fitment or quality, please contact us and we will respond within 24 hours.

Recommended Companion Parts for Repair

Companion Parts / Related Components

During routine replacement or major brake system overhaul of the rear brake wheel cylinder, the following rear drum brake system components are typically used together or in combination:

All of the above products can be purchased as a one-stop solution from A1 AUTO PARTS CONNECTION.