Introduction
This instruction manual provides essential information for the proper use and installation of the Stevens Lake Parts Brake Master Cylinder Repair Kit, part number 930775. This kit is designed to restore the functionality of the brake master cylinder in compatible Zetor tractor models. Please read this manual thoroughly before proceeding with any installation or repair work.
Safety Information
Working with brake systems requires caution and proper procedures. Incorrect installation or repair can lead to brake failure, resulting in serious injury or death. It is highly recommended that installation be performed by a qualified technician. If you are not experienced with brake system repairs, consult a professional.
- Always wear appropriate personal protective equipment, including safety glasses and gloves.
- Ensure the vehicle is securely supported on jack stands before working underneath it.
- Disconnect the battery before beginning work to prevent accidental electrical shorts.
- Brake fluid is corrosive; avoid contact with skin and painted surfaces. Clean spills immediately.
- Never reuse old brake fluid.
- Properly dispose of old brake fluid and components according to local regulations.
Package Contents
Each Stevens Lake Parts Brake Master Cylinder Repair Kit (930775) contains the following components:
- (2) Two complete sets of brake master cylinder repair components, including springs, seals, and retaining clips.
Compatibility
This repair kit is compatible with the following Zetor tractor models:
- 3320 Series: 3320, 3340
- 4320 Series: 4320, 4340
- 5011 Series: 5011, 5211, 5213, 5243, 5245, 5320, 5340, 5340H
- 6011 Series: 6011, 6045, 6211, 6245, 6320, 6340
- 7011 Series: 7011, 7045, 7211, 7245, 7245H, 7320, 7340, 7711, 7745
This kit replaces part numbers 930775 and S.64829.
Installation (Setup)
The following steps outline a general procedure for replacing brake master cylinder components. Always refer to the specific service manual for your Zetor tractor model for detailed, model-specific instructions and torque specifications.
- Preparation: Park the tractor on a level surface, engage the parking brake, and block the wheels.
- Access: Locate the brake master cylinder. This may require removing panels or other components.
- Drain Brake Fluid: Carefully drain the brake fluid from the master cylinder reservoir.
- Remove Master Cylinder: Disconnect brake lines and mounting bolts, then remove the master cylinder from the tractor.
- Disassembly: On a clean workbench, carefully disassemble the master cylinder, noting the orientation and position of all components.
- Clean Components: Thoroughly clean the master cylinder bore and all reusable components with appropriate brake cleaner. Inspect for wear, scoring, or damage. Replace the entire master cylinder if significant damage is found.
- Install New Components: Lubricate new seals and O-rings from the repair kit with clean brake fluid. Install the new components into the master cylinder according to the reverse order of disassembly, ensuring correct orientation.
- Reassembly: Reassemble the master cylinder.
- Reinstallation: Mount the master cylinder back onto the tractor, reconnect brake lines, and refill the reservoir with new, clean brake fluid of the specified type.
- Bleed Brake System: Thoroughly bleed the entire brake system to remove all air. This is a critical step for proper brake function.
Note: This is a general guide. Specific tractor models may have unique procedures. Always consult your tractor's official service manual.
Operating (Post-Installation Checks)
After installation and bleeding the brake system, perform the following checks before operating the tractor:
- Brake Pedal Feel: The brake pedal should feel firm and consistent. A spongy or soft pedal indicates air in the system, requiring further bleeding.
- Fluid Leaks: Inspect all brake line connections and the master cylinder for any signs of fluid leaks.
- Test Drive: Conduct a low-speed test drive in a safe, open area to verify proper brake function. Ensure the tractor stops smoothly and predictably.
Maintenance
Regular maintenance of your tractor's brake system is crucial for safety and longevity:
- Brake Fluid Level: Regularly check the brake fluid level in the reservoir and top up as needed with the manufacturer-specified fluid.
- Brake Fluid Condition: Brake fluid absorbs moisture over time, which can lead to corrosion and reduced braking performance. Follow your tractor manufacturer's recommendations for brake fluid replacement intervals.
- System Inspection: Periodically inspect brake lines, hoses, and components for wear, damage, or leaks.
Troubleshooting
| Symptom | Possible Cause | Solution |
|---|---|---|
| Spongy Brake Pedal | Air in the brake system | Re-bleed the entire brake system thoroughly. |
| Brake Fluid Leak | Improperly tightened fittings, damaged seals, or faulty components. | Inspect all connections and components. Tighten fittings to specifications. Replace any damaged parts. |
| Brakes Not Engaging Fully | Insufficient fluid, air in system, or incorrect component installation. | Check fluid level, bleed system, verify correct installation of repair kit components. |
If troubleshooting steps do not resolve the issue, seek assistance from a qualified mechanic.
Specifications
- Part Number: 930775
- Interchangeable Part Numbers: S.64829
- Product Dimensions: Approximately 5 x 5 x 5 inches (packaged)
- Product Weight: Approximately 8 ounces (packaged)
- Manufacturer: Aftermarket
Warranty and Support
For information regarding warranty coverage or technical support for your Stevens Lake Parts Brake Master Cylinder Repair Kit, please contact the seller directly through your purchase platform. Provide your order details and the product part number (930775) for efficient assistance.
