NHTSA ID Number: 10081155
Manufacturer Communication Number: TP09101
Summary
THIS TECHNICAL BULLETIN IS A KIT INSTALLATION DOCUMENT THAT HAS BEEN UPDATED TO MEET THE CURRENT PRODUCT OFFERING.
1 Affected Product
Equipment
MERITOR WABCO
Service Parts Instructions
Meritor
WABCO HPB Kit with ECU (10 Coil)
Kits 400 850 877 0, 400 851 877 0 and 400 851 886 0 for Servicing Units 478 407 125 0, 478 408 125 0 and 478 408 135 0
Hazard Alert Messages
Read and observe all Warning and Caution hazard alert messages in this publication. They provide information that can help prevent serious personal injury, damage to components, or both.
WARNING
To prevent serious eye injury, always wear safe eye protection when you perform vehicle maintenance or service.
Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can slip and fall over. Serious personal injury and damage to components can result.
Release all air from the air systems before you remove any components. Pressurized air can cause serious personal injury.
CAUTION
The HCU hydraulic power brake system is a complex device that provides optimum efficiency and operation. If the system sustains damage, or a component malfunctions and requires replacement, the replacement procedures provided by Meritor WABCO must be followed exactly with the associated steps performed in the order presented.
Hydraulic brake fluid is a caustic substance. Contact with the hydraulic brake fluid can cause skin irritation. Do not let hydraulic brake fluid touch any painted surfaces, as it will remove the paint. Hydraulic brake fluid may also damage certain non-metal surfaces. Do not let fluid contact brake pads, shoes, rotors or discs.
Introduction
Meritor WABCO Kits 400 850 877 0, 400 851 877 0 and 400 851 886 0 contain the following parts:
- HCU (Hydraulic Compact Unit)
- Reservoir
- Screws (4)
The following kit assembly procedures describe the process of assembling the parts of a kit. Refer to Meritor WABCO Maintenance Manual MM-0401, Meritor WABCO Hydraulic Power Brake (HPB) System, for procedures to install the kit onto the vehicle.
How to Obtain Additional Maintenance, Service and Product Information
Refer to Maintenance Manual MM-0401, Meritor WABCO Hydraulic Power Brake (HPB) System. Call the Meritor OnTrac™ Customer Call Center at 866-OnTrac1 (668-7221) to obtain this publication. Meritor WABCO publications are also available on our website: meritorwabco.com
Kit Assembly
1. Wear safe eye protection.
2. Remove and scrap the plastic cover from the top of the HCU.
Scrap the four screws.
3. Install the reservoir onto the HCU using the four screws. Ensure that the four rubber bushings are in the correct position.
4. Tighten the reservoir screws to 3.69-5.16 ft-lb (5-7 N•m).
5. Refer to Maintenance Manual MM-0401, Meritor WABCO Hydraulic Power Brake (HPB) System, for the procedure to install the unit on the vehicle.
TP-09101
Revised 07-16
TP09101
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock protection
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock protection
- Provides an extra margin of safety in extreme braking conditions (packaging may vary)
- Mix of polyglycol ethers ensures hot brake-system operation will not create dangerous vapor
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy pedal
- Both wet and dry boiling points exceed the minimum government standards
- Exceeds DOT 3 regulations: Formulated to meet or surpass DOT 3 requirements, ensuring consistent braking performance and dependable stopping power in all conditions
- Premium high boiling point: Helps prevent vapor lock and brake fade under extreme heat, maintaining safe and reliable braking even in demanding situations
- Full synthetic formula: Provides superior resistance to moisture absorption and corrosion, helping protect vital brake system components for long-lasting performance
- Superior protection and performance: Designed to deliver reliable braking under extreme temperatures while supporting the safety and efficiency of the braking system
- Recommended applications: Suitable for ABS, disc, and drum brake systems; surpasses SAE J1703, FMVSS 116, and ISO 4925 DOT 3 specifications
- High quality blend of polyethylene glycol ethers and additives
- Compatible with all brake system rubber components and other brake fluids
- Prevents seal hardening or softening
- Protects against rust and corrosion
- Provides excellent lubricity
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