Description

Hendrickson PRIMAAX EX 232, PRIMAAX EX 462, PRIMAAX EX 692, PRIMAAX EX 262, PRIMAAX EX 522 2012 Service Manual

If you’re chasing air leaks or pinion angle on a PRIMAAX EX without factory specs, you’re wasting time and risking a comeback. I’ve seen guys reuse U-bolt locknuts because some aftermarket PDF told them it was fine. That gets expensive. This 80-page Hendrickson PRIMAAX EX 232, PRIMAAX EX 462, PRIMAAX EX 692, PRIMAAX EX 262, PRIMAAX EX 522 2012 Service Manual is the real deal. Published in 2012, it covers those five models plus the Kenworth-specific PRIMAAX versions. Print it, dog-ear it, get it greasy. It’s built for the bench, not the coffee table.

Torque Specifications: Why Page 66 Matters

Section 9 is where most of you will live. Page 66 lists every torque spec for fasteners on this suspension—U-bolt locknuts, torque rod bolts, frame hanger bolts, everything. I don’t care how good you think your memory is. Use the manual. I’ve pulled more than one axle because a U-beam came loose from undertorqued D-pin nuts. The spec is there. Use it.

Preventive Maintenance Intervals and Component Inspection

Section 6 lays out Hendrickson’s recommended inspection intervals. You get areas of inspection on page 28, then a table on page 29 telling you when to check what. Component inspection covers U-bolt locknuts (page 32), torque rods (page 33), air fittings (page 34), and shocks (page 34). If you’re in a fleet shop, you’ll want to copy those pages for your PM sheets. They’re that specific.

Component Replacement: U-beam Assembly and D-Pin Bushing

Section 8 runs from page 41 to page 64. It covers every wearable part on this suspension. Need to swap a U-beam assembly? Pages 47-50 walk you through it, including the cross tube removal. D-Pin bushing replacement starts on page 51. The manual even tells you which special tools from Section 4 you’ll need—like bushing driver set. No guessing.

What Alignment Adjustments Does This Manual Cover?

Section 7 is your alignment chapter. Ride height adjustment (page 36), lateral alignment (page 36), axle pinion angle (page 36), the whole nine yards. There’s a drive axle alignment inspection procedure on page 37, then step-by-step adjustments starting page 38. If you’re fighting driveline vibration, the pinion angle adjustment on page 40 is where you start. That’s OEM procedure, not some forum post.

3 Critical Sections for the Shop Floor

Section 1 (Introduction) reminds you to use only Hendrickson Genuine parts—read it. Section 3 is the safety notice; don’t skip it. Section 10 is a troubleshooting guide starting page 78. If you’ve got an odd noise or ride height issue, it gives you a diagnostic path. I keep a tab on that section in my copy.

Page 2 confirms this is LIT NO 17730-263, Revision C, dated March 2012. That’s the factory document, not a reprint. Don’t trust aftermarket copies of this manual—they miss torque specs and part numbers. This PDF is the original OEM file.

For other drivetrain components, like checking how alignment affects a Manual Transmission, this manual’s specs give you the foundation. And when you’re chasing a vibration that feels like a Manual Transmission issue, the torque rod bushing inspection on page 45 might save you a full teardown.

Frequently Asked Questions

Does this manual cover the PRIMAAX EX 262S/522S?

Yes, pages 22-23 cover those models.

What torque specs are included?

Section 9 (page 66) lists all fastener torques. You need to use them—I’ve seen frame hangers come loose because someone guessed. The spec includes U-bolt locknuts, torque rod bolts, shock absorber fasteners, and more. If you don’t have this page, you’re working blind. I’ve had a customer bring a rig in with a loose support beam because the previous shop used a generic torque chart. That’s a safety issue. Hendrickson publishes these specs for a reason—they’re tested for that exact joint. Page 66 covers everything from the frame hanger to the bottom cap. Don’t skip it.

Is this from Hendrickson directly?

Yes, this is the official factory service manual, lit no. 17730-263, revision C, dated March 2012.

Can I use this for preventive maintenance?

Section 6 covers preventive maintenance intervals and component inspection steps including U-bolt locknuts and air fittings. If you’re running a fleet, you’ll want those PM interval tables.

Related Manuals:

• Hendrickson HAS Tandem/Single 1999 Service Manual Review
• Hendrickson AIRTEK STEERTEK Freightliner Western Star Sterling 2010 Service Manu
• Hendrickson SOFTEK STEERTEK AIRTEK 2011 Service Manual

This is the manual you want on your tablet or printed on the bench. Access the Factory Manual now—no more guessing, no more comebacks.