Description

Overview

The Hendrickson air spring is a complete reversible-sleeve assembly with a plastic piston for compatible INTRAAX and VANTRAAX trailer suspensions. It supports the trailer through changing loads while allowing controlled axle movement and maintaining the suspension’s operating ride height. This 8709-family variant is sold individually as one complete unit.

Features

• Complete rubber bellows and plastic piston assembly
• Single rolling-lobe design for trailer air suspension
• Matches identified 8709-family replacement references
• One complete air spring supplied per purchase

Specifications and Materials

The assembly combines the flexible rubber bellows, upper mounting section and moulded plastic piston as one replacement unit. The piston construction, mounting arrangement and suspension ride-height requirement are important selection details.

Part number: SP558709-KP.

See the Hendrickson INTRAAX suspension overview

Compatibility and Fitment

Compare the old markings, overall diameter, compressed and extended heights, upper stud pattern, lower piston mounting and required ride-height spacer before ordering. The main mismatch risk is selecting a similar INTRAAX or VANTRAAX air spring with a different piston, mounting arrangement or suspension height requirement.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. AS1R8709C, 566ER870924, 566ER870936, RML78709CP, 64624, 101015P453, 64645, 1010515P460, S21800, 4528709L, 4528709, 3528709, W013588709, W013588751, W014558742, 1R13159, S20900, C20900, C21800, 1R13249, G2298709200, MAF8709, AS8453, 8460, AS87510, SP0057M

Related Parts

Check the related service part below against the suspension assembly before ordering.

Compliance and Safety

Exhaust the suspension air pressure and support the trailer securely before removing the old unit. Inspect the mounting plate, spacer, fasteners and air connection, then pressurise the suspension gradually and check for leaks, clearance and correct ride height. Do not mix different air spring designs across the same suspension group.

Trailer Applications

This Hendrickson air spring suits identified INTRAAX AAT23K, AAT25K, AAT30K, AANT23K and AAEDT30K configurations, along with VANTRAAX HKA 180, HKA 200, HKA 250 and HKANT 40K, 46K and 50K trailer suspension systems.

Cross-reference and Suitability

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

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