An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

Home : Articles
Would you stake your life, right now, on the condition of your equipment?
NEWS | March 4, 2021

HIMAR: Frame Rail Check

This article initially appeared in PS 789 (Aug 18), p. 38-39. 
The HIMARS chassis’ TM 9-2320-450-13&P in IETM EM0259 (Sep 16) has an error in Step 11 of the Weekly PMCS. This is the correct criteria for frame rail damage:
Frame Rail Inspection Correction

Bend Evaluation
1. Put a straight edge against the bottom of the frame rail.
Bend Evaluation
Bend evaluation with straight edge
2. Measure damage depth at the widest point.
2.	Measure damage
Measure damage
3. Look for cracks, tears, sharp bends or flattened areas that indicate metal-to-metal contact. 
4. Use this criteria: 
  • under 12mm, no restriction.
  • 12-30mm, monitor and inspect after operations.
  • 30-40mm, no off-road driving and contact AMCOM LAR.
  • 41mm or greater, deadline vehicle and contact LAR for depot repair of frame rails.     
For any launchers with bent frame rails with damage over 30mm, inspect motor mounts and bump stops. *Check leaf springs around U-bolts and mounting brackets. Also check leaf springs for cracks. Check spring and cab latch mounting bracket for damage or cracking.*
 Inspect for damage or cracking
Inspect for damage or cracking
Don’t forget to perform the shock inspection like it says in the after operation PMCS in TM 9-2320-450-13&P.

Replace shocks that show any signs of damage following the instructions in the TM. Make sure the front shocks have been changed within the last two years.
Replace damaged shocks
Replace damaged shocks

Good shocks help prevent bent frame rails.

Check shocks after operations and replace every 2 years
**Also, don’t forget to check motor mounts for cracks and damage. Pay attention to the front ones as they get abused if the frame rails are damaged.**

This correction will be made in the next change to TM 9-2320-450-13&P.
Note: The sentences that appear between * and ** are changes or additions to the original article.
Want to get better search results faster? 
Click the link below to access our "how to" guide
After entering a keyword, you must hit or click the Search bar/box below for the function to work.
Simply hitting Return won't yield results.
Note about links to archive articles

If you come across a link to a pre-2014 PS Magazine issue or article that uses LOGSA in the web address (URL), use this link instead:
For issues/articles from 2014 and after, click on the Archive/Index tab in the top menu of this website.

BE ADVISED: With the migration to Army365, emails in older articles may still reflect an address. To update, change the domain to