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Cat Excavator Boom Cylinders

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Cat Excavator Boom Cylinders parts list
Image Fits Model Description Part # Price Product Details
Cat Boom Cylinder for 320C – 2043614 See Details 320C Boom Cylinder 2043614
From $4,469.00
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Cat Boom Cylinder for 325C, 325D, 325D FM, 325D L – 2959400 See Details 325C, 325D, 325D FM, 325D L Boom Cylinder 2959400
From $6,628.00
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Cat Cylinder / Boom Cylinder for 330, 330 FM L, 330 L – 7Y4906 See Details 330, 330 FM L, 330 L Boom Cylinder 7Y4906
From $7,473.00
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Cat Boom Cylinder for 345C, 345C L, 345D, 345D L & More – 3891041 See Details 345C, 345C L, 345D, 345D L, 345D L VG, 349D, 349D L, 349D2, 349D2 L Boom Cylinder 3891041
From $8,922.00
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Boom Cylinder for Caterpillar 345C, 345D, 349D, 349D L Excavators See Details 345C, 345C L, 345D, 345D L, 345D L VG, 349D, 349D L Boom Cylinder 225-4523
From $6,750.00
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Cat Boom Cylinder for 385B, 385C, 385C L – 1559068 See Details 385B, 385C, 385C L Boom Cylinder 1559068
From $20,390.00
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Cat Boom Cylinder for 390F L, 385C, 385C L, 390D & More – 3629780 See Details 390F L, 385C, 385C L, 390D, 390D L, 390F, MH3295 Boom Cylinder 3629780
From $20,714.00
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Cat Boom Cylinder Rod Assembly for 320C – 1772575 See Details 320C Boom Cylinder Rod Assembly 1772575
From $1,175.00
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Cat Boom Cylinder Rod Assembly for 330, 325B L, 330B, 330B L & More – 7Y4914 See Details 330, 325B L, 330B, 330B L, 330B LN, W330B MH Boom Cylinder Rod Assembly 7Y4914
From $3,268.00
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Cat Boom Cylinder Tube for 325B, 330B, 330C, 330C L – 3119508 See Details 325B, 330B, 330C, 330C L Boom Cylinder Tube 3119508
From $5,957.00
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Cat Boom Cylinder Seal Kit for 320C, 318C L, 318C LN – 2478998 See Details 320C, 318C L, 318C LN Boom Cylinder Seal Kit 2478998
$48.00
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Cat Boom Cylinder Seal Kit for 330, 1390, 2, 2590 & More – 2481168 See Details 330, 1390, 2, 2590, 322B L, 325B L, 330B L, 541, 551, 552, TK741, TK751, TK752 Boom Cylinder Seal Kit 2481168
$63.00
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Cat 320C-320E Boom & 323D-330D Bucket Cylinder Seal Kit 2478790 – 85mm Rod x 120mm Bore See Details 320C, 320D, 320D FM, 320D FM RR, 320E, 320E L/LN/LRR/RR, 323D L/LN/SA, 323E L, 324D L, 325D, 325D L, 330D L, 345C L Cylinder Seal Kit 85mm 2478790
$54.00
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Cat 320D, 325D, 325D L, 328D LCR, 329D, 329D L Excavator Boom Cylinder Seal Kit 2344566 See Details 320D, 325D, 325D L, 328D LCR, 329D, 329D L Excavator Boom Cylinder Seal Kit 4560200
$76.00
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Cat 330C, 330C L, 330D, 330D L, 330D LN, 336D L Excavator Boom Cylinder Seal Kit 2304001 See Details 330C, 330C L, 330D, 330D L, 330D LN, 336D L Excavator Boom Cylinder Seal Kit 2304001
$115.00
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Cat excavator Boom Hydraulic Cylinder Tube for 318C, 319C – 2003395 See Details 318C, 319C Boom Cylinder Tube 2003395
From $2,668.00
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Cat Boom Cylinder for 320B. 320C – 2897865 See Details 320B, 320C Boom Cylinder 2897865
From $4,624.00
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Replacement boom cylinders, cylinder groups, tubes, rod assemblies, and seal kits for Caterpillar hydraulic excavators, covering new and used components across 320, 325, 330, 345, 385, and 390 series machines.

Fits Models At A Glance

  • 320 Series: 320C, 318C L, 318C LN
  • 325 Series: 325B, 325B L, 325C, 325D, 325D FM, 325D L
  • 330 Series: 330, 330 FM L, 330 L, 330B, 330B L, 330B LN, 330C, 330C L, W330B MH
  • 345 Series: 345C, 345C L, 345D, 345D L, 345D L VG
  • 349 Series: 349D, 349D L, 349D2, 349D2 L
  • 385/390 Series: 385B, 385C, 385C L, 390D, 390D L, 390F, 390F L, MH3295

Key Notes

  • Application: Boom lift and lowering hydraulic actuation
  • Component Types: Complete cylinder groups, tubes, rod assemblies, seal kits
  • Condition: New and used options available by model
  • Fitment: Verify part number against machine serial and configuration

Why Choose Broken Tractor

  • ✅ Deep Caterpillar excavator hydraulic inventory across generations
  • ✅ Fast shipping from Louisiana and Ohio warehouses
  • ✅ Knowledgeable support to confirm correct fitment

Frequently Asked Questions

What boom cylinder fits a Cat 330 excavator?

Broken Tractor offers boom cylinder 7Y4906 for the Cat 330, 330 FM L, and 330 L excavators. For later 330 machines, we also carry boom cylinder tube 3119508 for the 330B, 330C, and 330C L, plus rod assembly 7Y4914 for the 330, 330B, 330B L, and 330B LN. Fitment can change with serial number and configuration, so match your existing part number before ordering.

Which Cat excavator models do your boom cylinders fit?

We carry boom cylinders and boom cylinder components for Cat 318C, 320B, 320C, 325B, 325C, 325D, 330, 330B, 330C, 345C, 345D, 349D, 349D2, 385B, 385C, 390D, and 390F excavators, including many L and LN versions. Each product lists its exact fitment. Confirm the part number against your machine serial before you buy.

Should I replace the whole Cat excavator boom cylinder or just reseal it?

It depends on which parts of the cylinder are worn. Broken Tractor offers complete boom cylinders, boom cylinder tubes, rod assemblies, and seal kits, so you can replace only the components you need. A seal kit addresses the seals, while a damaged rod or tube calls for a rod assembly, a tube, or a complete cylinder.

What boom cylinder seal kit fits a Cat 320C excavator?

We carry two boom cylinder seal kits that fit the Cat 320C. Seal kit 2478998 fits the 320C, 318C L, and 318C LN, and seal kit 2478790 fits 320C through 320E boom cylinders with an 85 mm rod and 120 mm bore. Check your cylinder part number or rod and bore size to choose the right kit.

Are your Cat excavator boom cylinders new or used?

Broken Tractor offers both new and used boom cylinder options, and which one is offered depends on the model. Because boom cylinder fitment depends on machine serial number and configuration, match your part number before ordering. For help confirming the correct cylinder, call our parts team at (800) 909-7060.

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Product: Category: Cat Excavator Boom Cylinders Brand: Head Title: Cat Excavator Boom Cylinders | Broken Tractor