Dorman W695 Drum Brake Wheel Cylinder Instruction Manual

Introduction

This manual provides essential information for the installation, operation, maintenance, and troubleshooting of the Dorman W695 Drum Brake Wheel Cylinder. This component is engineered as a direct replacement part, ensuring compatibility and performance matching the original equipment on specific vehicle models. Proper installation and maintenance are crucial for the safe and effective operation of your vehicle's braking system.

Product Overview

The Dorman W695 Drum Brake Wheel Cylinder is a critical component of a vehicle's drum brake system. It is responsible for converting hydraulic pressure from the master cylinder into mechanical force, pushing the brake shoes against the brake drum to create friction and slow down or stop the vehicle.

Figure 1: Front view of the Dorman W695 Drum Brake Wheel Cylinder, showing the main body, bleeder screw, and threaded ports.

Figure 2: Side view of the Dorman W695 Drum Brake Wheel Cylinder, highlighting the robust casting and rubber boots protecting the pistons.

Figure 3: End view of the Dorman W695 Drum Brake Wheel Cylinder, showing the rubber boot and the piston housing.

Installation (Setup)

Installation of the drum brake wheel cylinder requires mechanical aptitude and proper tools. If you are not confident in your ability to perform this repair, it is recommended to seek professional assistance. Always refer to your vehicle's specific service manual for detailed instructions and torque specifications.

Safety Precautions:

• Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
• Ensure the vehicle is securely supported on jack stands on a level surface.
• Disconnect the negative battery terminal before starting work.
• Brake fluid is corrosive; avoid contact with skin and painted surfaces.

Installation Steps:

1. Preparation: Remove the wheel, brake drum, and brake shoes according to your vehicle's service manual. Clean the area thoroughly.
2. Disconnect Old Cylinder: Disconnect the brake line from the old wheel cylinder. Be prepared for brake fluid leakage. Remove the mounting bolts holding the old wheel cylinder.
3. Install New Cylinder: Position the new Dorman W695 wheel cylinder and secure it with the mounting bolts. Tighten to manufacturer's specifications.
4. Connect Brake Line: Reconnect the brake line to the new wheel cylinder. Ensure a tight, leak-free connection.
5. Reassemble Brakes: Reinstall the brake shoes, springs, and other drum brake components. Ensure all parts are correctly seated and aligned.
6. Bleed Brake System: Bleed the brake system to remove any air introduced during the installation process. Start with the wheel cylinder furthest from the master cylinder and work your way closer. Refer to your vehicle's manual for the correct bleeding procedure.
7. Final Checks: Reinstall the brake drum and wheel. Lower the vehicle. Pump the brake pedal several times to build pressure. Check for any brake fluid leaks. Test drive the vehicle in a safe area at low speed to confirm proper brake operation before normal use.

Operating Principles

The Dorman W695 Drum Brake Wheel Cylinder operates on the principle of hydraulic pressure. When the brake pedal is pressed, brake fluid is forced from the master cylinder through the brake lines to the wheel cylinders. Inside the wheel cylinder, this hydraulic pressure acts on pistons, which in turn push the brake shoes outwards against the inner surface of the brake drum. This friction generates the braking force required to slow or stop the vehicle. When the brake pedal is released, the pressure is relieved, and return springs pull the brake shoes back to their original position, disengaging them from the drum.

Maintenance

Regular inspection and maintenance of your vehicle's braking system are vital for safety and longevity. While the Dorman W695 wheel cylinder is designed for durability, periodic checks can prevent issues.

• Brake Fluid Level: Regularly check the brake fluid level in the master cylinder reservoir. Low fluid can indicate a leak or worn brake pads.
• Brake Fluid Condition: Brake fluid should be clear or light amber. Dark or cloudy fluid may indicate contamination and should be flushed and replaced according to your vehicle manufacturer's recommendations.
• Leak Inspection: Periodically inspect the wheel cylinders for signs of brake fluid leaks, especially around the rubber boots. Any leakage indicates a failing seal and requires immediate attention.
• Brake Shoe Wear: Inspect brake shoes for wear during routine maintenance. Worn shoes can put additional stress on the wheel cylinder.
• Drum Condition: Ensure brake drums are free from excessive scoring, cracks, or out-of-round conditions.

Troubleshooting

If you experience issues with your drum brake system, the following table outlines common symptoms and potential causes related to the wheel cylinder.

Note: Always consult a qualified mechanic for complex brake system issues.

Specifications

Vehicle Compatibility:

This part is compatible with the following Divco models and years:

• Divco 214: 1961
• Divco 224: 1961
• Divco 244: 1961
• Divco 334: 1961
• Divco 374: 1961

Warranty and Support

Dorman Products are manufactured to high-quality standards and are backed by Dorman's commitment to providing reliable automotive replacement parts. For specific warranty details, claims, or technical support, please refer to the official Dorman website or contact Dorman customer service directly. Dorman aims to provide solutions that save time and money, and increase convenience and reliability for repair professionals and vehicle owners.

You can find more information and support resources by visiting the official Dorman Store: Dorman Store on Amazon