Hendrickson Truck Parts Catalog

PRIMAAX ® EX – Freightliner • Western Star Vehicles

REAR SUSPENSIONS

■ Technical Notes The following information is intended to assist in determining which suspension is equipped on the vehicle.As an example, Figure 1 identifies the suspension rating and capacity. Refer to Literature No. SP-164 for FIREMAAX EX, available online at www.hendrickson‑intl.com.

SUSPENSION RATING CAPACITY •

FIGURE 1

Small Clamp Group Axle Size

Large Clamp GroupAxle Size

DANA AXLE

MERITOR AXLE

AXLE

134 mm (5.3")

150.1 mm (5.9")

140 mm (5.5")

134.8 mm (5.3")

140 mm (5.5")

117 mm (4.6")

Suspension Model: PRIMAAX EX 23K•46K•69K | 26K S•52K S•78K S S – designates Small Clamp Group

Suspension Model: K 26K•52K•78 PRIMAAX EX

U-bolts

4¼"

5 9 16 / "

6¼"

D-Pin

AIR SPRINGS •TRANSVERSETORQUE RODS

PRIMAAX EX 23K 46K 69K • •

PRIMAAX EX 26K 52K 78K • •

PRIMAAX EX 26KS 52KS 78KS • •

Air SpringAssembly

ULTRA ROD ® Transverse Torque Rod Assembly

TRAAXROD ® Transverse Torque Rod Assembly

TRAAX ROD Transverse Torque Rod Assembly

ULTRA ROD Transverse Torque Rod Assembly

NOTES: Quantities specified are shown for a tandem suspension.Adjust quantities for single or tridem suspensions. Quantities of service kit components may vary from amount shown in lists. * Item included in kit/assembly only, part not sold separately. ** Transverse Torque Rods are mandatory for the PRIMAAX EX suspensions regardless of axle spacing. See Literature Nos. 59310‑‑004 and 59310-058 for more information.TRAAX ROD bushings are non-serviceable, the entire torque rod assembly requires replacement.Visit the TRAAX ROD website www.traaxrods.com for more information. *** S-cam is not required for disc brakes. **** Alternate configuration of the QUIK-ALIGN fasteners.The locknuts located inboard will allow additional clearance for wider tires or tires with chains.Tightening is still required ONLY on the locknut. ***** As originally equipped by the vehicle manufacturer. NOTE: For Severe Service kits, See Page 413.

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