Overview
The ZF 4681.109.004 PARKING BRAKE is a critical safety and holding component designed specifically for the BP210, BP230, and WG210 series transmissions. This OEM genuine part engages mechanically to lock the output shaft, preventing vehicle roll-away when parked or during stationary operation. Positioned within the rear section of the transmission housing, the parking brake assembly interfaces directly with the HOUSING REAR PART and the HOUSING REAR SECTION to ensure precise alignment and secure operation. The SKU 4681.109.004 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and reliable performance in demanding industrial applications.
Symptoms of Failure
When the ZF 4681.109.004 parking brake begins to wear, operators will notice distinct performance issues. Common failure symptoms include:
- Vehicle Creep on Inclines: The most dangerous sign is the vehicle slowly rolling forward or backward on a slope despite the parking brake being fully engaged.
- Audible Grinding or Clicking: A metallic grinding noise from the transmission area when engaging or disengaging the parking brake indicates worn internal components or misalignment with the HOUS.FRONT SECT.
- Inconsistent Brake Holding Power: The brake may hold intermittently, requiring excessive lever force or multiple attempts to lock the driveline.
- Oil Contamination in Brake Area: Leaking seals within the TRANSMISSION HOUSING can allow transmission fluid to contaminate the parking brake friction surfaces, drastically reducing holding torque.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4681.109.004 |
| OEM Reference | ZF 4681.109.004 |
| Material | Hardened Steel / Sintered Metal |
| Weight (approx.) | 2.4 kg (5.3 lbs) |
| Max Holding Torque | 1,200 Nm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF parking brake is engineered for the BP210, BP230, and WG210 transmission families. It is also compatible with the WG180 and WG200 series when used with the correct FIXING PLATE and mounting hardware. The 4681.109.004 assembly is designed to integrate seamlessly with the rear housing sections of these transmissions, making it a direct replacement for worn units in construction, agricultural, and material handling equipment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201168 | HOUSING REAR PART | Rear housing section for output components |
| 4657298101 | HOUSING REAR SECTION | Auxiliary rear housing cover |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4656301148 | FIXING PLATE | Mounting plate for brake assembly |
| 4657301032 | SCREEN SHEET | Filter screen for oil flow |
| 4657301033 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Fastener for brake mounting |
Frequently Asked Questions
Q: Can the 4681.109.004 parking brake be rebuilt, or must it be replaced entirely?
A: This is a complete OEM assembly unit. While internal friction discs can sometimes be serviced, ZF recommends replacing the entire 4681.109.004 assembly to ensure proper clearance and holding torque. Always inspect the mating HOUSING REAR PART for wear during replacement.
Q: How do I verify that the parking brake is correctly installed?
A: After installation, manually rotate the output flange. The brake should engage with a distinct mechanical click and lock the shaft completely. No more than 2-3 mm of axial play should be present. Use the CYLINDRICAL PIN for precise alignment during reassembly.
Q: Will this part fit a ZF WG200 transmission?
A: Yes, the 4681.109.004 is compatible with the WG200 series, provided you also install the correct FIXING PLATE (part 4656301148) and CAP SCREW (0636100803) for secure mounting.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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