Description

Overview

Slack Adjuster Return Spring BPW 152mm

Slack Adjuster Return Spring BPW 152mm helps pull the slack adjuster back to its neutral position after each brake application. That supports full brake release and helps reduce brake drag when the original spring has stretched, weakened, or corroded. This spring suits BPW and similar S-cam drum brake layouts where an external return spring is specified, provided the length, coil diameter, and hook style match what you remove.

Features

• 152mm overall length for common BPW-style setups
• 25mm outside diameter to suit typical bracket clearances
• Helps the slack adjuster return cleanly after braking
• Quick service item during routine brake inspections

Specifications and Materials

• To suit: BPW and compatible applications
• Overall length: 152mm
• Outside diameter: 25mm
• Component type: slack adjuster return spring

Part number: FB7379.
Additionally, use the BPW brake cylinder service manual for general service context when checking drum brake hardware.

Compatibility and Fitment

Confirm the free length, coil diameter, wire thickness (if you can measure it), and both hook ends against the spring you remove. Also check the slack adjuster, clevis pin, camshaft bushes, and S-cam free movement so a new spring does not hide a sticking linkage.

This cross-reference listing means this part is a suitable replacement for the part numbers and applications shown. Some changes in installation may be required. 05.397.26.03.0, 0539726030, 055060, BP3456, FL19.6855A, WT3456

Compliance and Safety

Brake work is safety-critical. Depressurise the air system and safely support the trailer before you start. After fitment, confirm the wheel rotates freely, check brake adjustment, and recheck after a short bedding run. If the opposite side spring looks tired, replace springs in pairs on the same axle to keep return tension consistent.

Trailer Applications

Commonly used on BPW and similar heavy trailer drum brake systems that use an external slack adjuster return spring. It also suits preventative servicing where brake release feels slow, uneven, or inconsistent, as long as the spring form and mounting points match.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Therefore, use cross-references as a search aid only, then confirm by physical spring shape and mounting points before ordering.

Why Choose ICS Trailers

ICS Trailers stocks common foundation brake hardware for heavy trailers and can help you confirm fitment from measurements and photos. You can also bundle related brake service items to cut downtime.

Browse Foundation Brakes at ICS Trailers to match related brake hardware.