Description

Overview

The Hendrickson S-25319 Air Spring from Sampa replaces the complete rolling-lobe assembly on selected INTRAAX and VANTRAAX trailer suspensions. It combines a rubber bellows, steel lower piston and internal bumper, rather than a bellows-only service component.

The assembly features two upper mounting positions and four lower mounting positions, with a 370mm maximum outside diameter and 320mm specified height. Its steel piston and mounting configuration distinguish it from other Hendrickson air spring variants.

Features

• Complete rolling-lobe air spring with steel piston.
• Integrated bumper for the specified suspension configuration.
• Two upper mounting positions and four lower mounting positions.
• Parallel bottom mounting alignment.

Specifications and Materials

• Manufacturer: Sampa
• Component: Complete air suspension spring
• Type: Rolling lobe
• Construction: Rubber bellows with steel piston
• Internal bumper: Yes
• Maximum outside diameter: 370mm
• Specified height: 320mm
• Minimum operating height: 7.5″ (190.5mm)
• Maximum operating height: 24.1″ (612.1mm)
• Top plate diameter: 11.31″ (287.3mm)
• Top mounting centres: 5.5″ (139.7mm)
• Top plate stud/hole quantity: 2
• Bottom plate diameter: 10.24″ (260.1mm)
• Bottom mounting centres: 7.87″ (199.9mm)
• Bottom mounting hole/stud quantity: 4
• Bottom plate material: Steel

Part number: SP551063-K.

For suspension identification and air spring mounting arrangements, refer to the Hendrickson INTRAAX suspension parts guide

Compatibility and Fitment

This air spring suits selected Hendrickson INTRAAX AAT23K, AAT25K, AAT30K, AANT23K and AAEDT30K suspensions, along with compatible VANTRAAX HKANT and HKA applications.

Before fitting, compare the existing piston, top studs, bottom mounting centres and suspension identification. Different air springs can share similar bellows dimensions while using different piston and mounting configurations.

The following cross-reference numbers identify verified equivalent or replacement parts for this exact application. Confirm the selection-critical fitment details against the part being replaced before fitting.

S-25319, C-25319, 11 10.5D-21 S 1063, 75269, 1R14-152, HENS25319, 566CT75269, 566ER4152, AB1R14-232, 45547152

Related Parts

The following separately available components support servicing of the air spring and its mounting arrangement.

Compliance and Safety

Before removal, support the trailer securely and release air pressure from the suspension. Inspect the mounting plates, studs, air connections and surrounding suspension components.

During installation, follow the applicable Hendrickson mounting procedure. Then restore air pressure gradually and check for leaks, correct suspension height and clearance throughout suspension travel.

Trailer Applications

The steel-piston assembly suits compatible Hendrickson-equipped semi-trailers, including freight, tanker, tipper and other heavy transport applications using the specified INTRAAX or VANTRAAX suspension arrangements.

Cross-reference and Suitability

This part cross-references to the following verified equivalent or replacement part numbers:

Why Choose ICS Trailers

When replacing a Hendrickson S-25319 Air Spring, matching the steel piston and mounting positions matters as much as the bellows dimensions. ICS Trailers can assist with comparing your original assembly against the required suspension configuration and identifying accompanying mounting components.

• Choose the complete steel-piston assembly when both the bellows and piston require replacement.
• Send through the existing air spring markings, suspension model or mounting measurements if you need assistance identifying the correct replacement.

Browse more Suspension