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JD 450, 550 Series Dozer Rock Guards

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JD 450, 550 Series Dozer Rock Guards parts list
Image Fits Model Description Part # Price Product Details
John Deere Dozer Track Rock Guard, Front Right Hand AT209641 See Details 450H*, 550H* Track Rock Guard, Front Right Hand AT209641
$255.00
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John Deere Dozer Rock Guard Set -- PV6611 | Broken Tractor See Details 450C, 450D, 450E, 455E, 550, 550B, 555 (5 Bottom Rollers) Rock Guard Set (5 Rollers) PV6611
From $2,006.00
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John Deere 450C, 450D, 450E, 455E, 550, 550B, 555, 550B Dozer Right Side Rock Guard -- AT79598 See Details (450C, 450D, 450E, 455E, 550, 550B, 555, 550B With 5 Bottom Rollers) Right Side Rock Guard AT79598
$490.00
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John Deere 450C, 450D, 450E, 455E, 550, 550B, 555, 550B Dozer Left Side Rock Guard -- AT79599 See Details (450C, 450D, 450E, 455E, 550, 550B, 555, 550B With 5 Bottom Rollers) Left Side Rock Guard AT79599
$490.00
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John Deere 450C, 450D, 450E, 455E, 550, 550B, 555, 550B Dozer Track Guard Spacer -- 28H3265 See Details (450C, 450D, 450E, 455E, 550, 550B, 555, 550B With 5 Bottom Rollers) Spacer 28H3265
$32.00
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John Deere Dozer Track Rock Guard Set -- PV6612 | Broken Tractor See Details (450G, 455G With 5 Bottom Rollers) Rock Guard Set PV6612
From $1,965.00
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Rock Guard Bolt & Nut for JD 450C, 455E & More See Details (450C, 450D, 450E, 455E, 550, 550B, 555, 550B With 5 Bottom Rollers) Bolt and Nut 19H3373
$25.00
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0 John Deere Dozer Track Rock Guard (Right Hand) -- AT135464 | Broken Tractor See Details (450G, 455G With 5 Bottom Rollers) Right Side Rock Guard AT135464
$445.00
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John Deere 455G, 450G Dozer Left Side Rock Guard -- AT135465 See Details (450G, 455G With 5 Bottom Rollers) Left Side Rock Guard AT135465
$445.00
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Rock Guard Spacer for John Deere 450G, 455G & 550G Dozer See Details 450G, 455G, (550G After Serial Number 771617) Spacer T121001
$32.00
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John Deere Dozer Rock Guard Bolt and Nut -- 19H3623- | Broken Tractor See Details 450G, 455G, 450H, 450J, 450K, 550G, 550H, 550J, 550K Bolt and Nut 19H3623-
$11.00
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John Deere Dozer Track Rock Guard Set -- PV6613 | Broken Tractor See Details 450G Long Track, (550G After Serial Number 771617 With 6 Bottom Rollers) Rock Guard Set PV6613
From $2,015.00
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John Deere 450G, 550G Dozer Right Side Rock Guard -- AT143013 | Broken Tractor See Details 450G Long Track, (550G After Serial Number 771617 With 6 Bottom Rollers) Right Side Rock Guard AT143013
$500.00
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John Deere 450G, 550G Dozer Left Side Rock Guard -- AT143012 | Broken Tractor See Details 450G Long Track, (550G After Serial Number 771617 With 6 Bottom Rollers) Left Side Rock Guard AT143012
$500.00
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John Deere Dozer Track Rock Guard Set -- PV6618 | Broken Tractor See Details 450H (After Serial Number 925919), 550H (After Serial Number 925919), 450J, 550J, 450K, 550K (After Serial Number F305398) Rock Guard Set PV6618
From $2,375.00
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John Deere Dozer Left Rock Guard -- AT306100 | Broken Tractor See Details 450H s/n 925919-, 550H s/n 925919-, 450J, 550J, 450K, 550K s/n F305398 Left Rock Guard AT306100
$566.00
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John Deere Dozer Right Rock Guard -- AT306101 | Broken Tractor See Details 450H s/n 925919-, 550H s/n 925919-, 450J, 550J, 450K, 550K s/n F305398 Right Rock Guard AT306101
$566.00
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John Deere Track Rock Guard, Front Left for 450H and 550H Dozers See Details 450H, 550H (Early) Track Rock Guard, Front Left AT209436
$255.00
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Track rock guards, guard sets, spacers, and mounting hardware for John Deere 450 and 550 series crawler dozers, covering left, right, and complete assemblies across C, D, E, G, H, J, and K generations.

Fits Models At A Glance

  • 450C-E / 550-555 Series: 450C, 450D, 450E, 455E, 550, 550B, 555
  • G Series: 450G, 455G, 550G
  • H Series: 450H, 550H
  • J Series: 450J, 550J
  • K Series: 450K, 550K

Key Notes

  • Application: Shields track rollers and undercarriage from rock and debris intrusion.
  • Configuration: Left, right, complete sets, spacers, and bolt/nut hardware available.
  • Fitment Variation: Roller count and serial number breaks affect correct part selection.
  • Sides: Left and right hand guards sold to match machine orientation.

Why Choose Broken Tractor

  • ✅ Fitment verified by series and serial number
  • ✅ Fast shipping from two US warehouses
  • ✅ New and quality used dozer parts available

Frequently Asked Questions

What rock guard fits a John Deere 450C or 550B dozer?

Broken Tractor carries a complete Rock Guard Set (SKU PV6611) for the 450C, 450D, 450E, 455E, 550, 550B, and 555 with 5 bottom rollers. We also offer the right hand guard (SKU AT79598) and left hand guard (SKU AT79599) separately if you only need one side. Match your side and roller count before ordering.

How do I know if I need a 5 bottom roller or 6 bottom roller rock guard on my 450G or 550G?

Roller count and serial number breaks determine the correct guard on the G series. The set for 450G and 455G with 5 bottom rollers is SKU PV6612, while the set for the 450G Long Track and 550G after serial number 771617 with 6 bottom rollers is SKU PV6613. Count your bottom rollers and check your serial number, then match the fitment listed on each product.

Which rock guard fits a 450H or 550H dozer by serial number?

There is a serial number break on the H series. Early 450H and 550H machines use the front left guard (SKU AT209436) and front right guard (SKU AT209641), while 450H and 550H after serial number 925919 use the set (SKU PV6618) or the left (SKU AT306100) and right (SKU AT306101) guards. Confirm your serial number before ordering to get the correct part.

Do you sell left and right rock guards separately for John Deere dozers?

Yes, Broken Tractor offers left and right hand rock guards sold individually so you can match your machine orientation. For example, the J and K series use left SKU AT306100 and right SKU AT306101. We also carry complete sets when both sides are needed.

What hardware and spacers are available for John Deere dozer rock guards?

We carry rock guard bolt and nut hardware along with track guard spacers. The bolt and nut SKU 19H3623 fits 450G, 455G, 450H, 450J, 450K, 550G, 550H, 550J, and 550K, and SKU 19H3373 fits the earlier 450C through 555 group. Spacers include SKU 28H3265 for the C and E series and SKU T121001 for the 450G, 455G, and 550G after serial number 771617. If you are unsure which parts you need, call our parts team at (800) 909-7060.

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Product: Category: JD 450, 550 Series Dozer Rock Guards Brand: Head Title: JD 450, 550 Series Dozer Rock Guards | Broken Tractor