Description

Overview

Caliper booster housing seal 42mm keeps the booster housing on Knorr SB, SK and SN air disc brake calipers sealed against dust and water. This protection helps the caliper keep working reliably on heavy trucks and trailers. Additionally, the seal lets technicians renew the booster interface during caliper overhaul without replacing the complete brake assembly.

Features

This caliper booster housing seal 42mm sits between the service brake caliper and the air booster to maintain a tight seal around the 42mm opening. The simple profile makes it easy to seat correctly during service. This ease of fit helps prevent leaks and contamination around the booster nose. In addition, the compact design suits confined axle spaces where access around the disc brake caliper is limited.

Specifications and Materials

Part number: FB2934.
This caliper booster housing seal 42mm suits Knorr SB, SK 6/7 and SN 6/7 series air disc brake calipers and ADB22X applications where a 42mm booster housing seal is specified. Additionally, seals in this position typically use oil resistant elastomer compounds so they can tolerate braking heat, dirt and common cleaning products. For further technical background on air disc brake service for these calipers, you can refer to this manufacturer service data resource

Compatibility and Fitment

This caliper booster housing seal 42mm suits Knorr SB, SK 6/7, SN 6/7 and ADB22X air disc brake calipers that use a 42mm booster housing interface. However, workshops should always confirm the seal diameter, caliper model and booster style against existing components before installation. This check helps avoid incorrect fitment on truck or trailer axles.

Compliance and Safety

Correct sealing at the booster housing helps keep moisture and contaminants away from the caliper guide and piston areas. Consequently, the brake can deliver more consistent response over its service life. Furthermore, technicians should follow the brake manufacturer service data, safe jacking procedures and torque settings when removing the booster and refitting the housing seal. This approach supports reliable braking performance after the vehicle returns to service.

Trailer Applications

Workshops commonly fit this caliper booster housing seal 42mm on European style trailers and dollies that run Knorr SB, SK and SN series disc brakes. Consequently, fleets can hold this seal as a small, low cost spare to support planned caliper overhauls. In addition, it helps cover urgent on road repairs on prime movers and trailers that share these caliper types.

Cross-reference and Suitability

Suppliers do not list specific cross reference part numbers for this caliper booster housing seal 42mm. Technicians should instead match the seal to the existing brake caliper by model designation and measured booster housing diameter to confirm suitability.

Why Choose ICS Trailers

ICS Trailers focuses on heavy trailer brake parts so you can source caliper components that suit common on road equipment. Moreover, the team selects parts that align with local trailer fleets and workshop practices to simplify ordering and reduce downtime during brake overhauls. For more disc brake hardware and overhaul components, you can browse Foundation Brakes at ICS Trailers